This study aimed to evaluate the partial substitution of concentrate for gliricidia silage (Gliricidia sepium) in diets of lambs during growth on nutrient intake, daily weight gain, and feed conversion. Were used 27 Santa Inês lambs not castrated, weaned, with an average initial live weight of 14.5 kg and aged approximately four months from the flock of Embrapa Semiárido‟. The animals were subjected to four treatments in relation to dry matter substitution, 1 - corn silage (60%) + concentrate (40%) 2 - corn silage (60%) + gliricidia silage (13.3% ) + concentrate (26.7%), 3 - corn silage (60%) + gliricidia silage (26.7%) + concentrate (13.3%) and 4 - corn silage (60%) + silage Gliricídia (40%). The experimental design was randomized with four treatments and variable number of 19 repetitions and the experimental unit was one lamb. The live weights were similar among the four different treatments in the initial weighing, showing a significant difference only in the final weight, where the lambs that were fed with diets containing concentrate, regardless of the level, showed similar or higher performance (P> 0.05) than lambs receiving only gliricidia. The daily weight gain of lambs was higher for those fed concentrate than other treatments. For body weight before and after fasting, treatments that consumed concentrate were higher (P <0.05) than the treatment without addition of concentrate, except for the exclusive treatment between the silage and the treatment they consumed fewer concentrated in body weight during fasting (P> 0.05) Losses in the fasting were not different (P> 0.05) between treatments. The hot and cold carcass weight were higher (P <0.05) for the treatment that did not consume gliricidia silage and in the treatment that consumed 26.7% concentrate related to the treatment that consumed silage gliricidia, and the treatment consumed 13.3% of concentrate. The hot and cold carcass yield were different (P <0.05) between treatments, where the two treatments who consumed more concentrate showed higher values than the others. Regarding the commercial cuts of carcasses treatments consuming concentrate had higher absolute weights, however, in the percent of weight, there was no significant difference (P> 0.05). / Objetivou-se avaliar a substituição do concentrado pela silagem de Gliricídia (Gliricidia sepium) em dietas de cordeiros em fase de crescimento sobre o consumo de matéria seca, ganho de peso, conversão alimentar . Foram utilizados 27 cordeiros da raça Santa Inês, não castrados, recém desmamados, com peso médio inicial de 14,5 kg e com idade aproximada de quatro meses, oriundos do rebanho da Embrapa Semiárido. Os animais foram submetidos a quatro tratamentos em relação a matéria seca, sendo estes: 1 - silagem de milho (60%) + concentrado (40%); 2 - silagem de milho (60%) + silagem de gliricídia (13,3%) + concentrado (26,7%); 3 - silagem de milho (60%) + silagem de gliricídia (26,7%) + concentrado (13,3%) e Tratamento 4 - silagem de milho (60%) + silagem de gliricídia (40%). O delineamento utilizado foi o Inteiramente Casualizado com 4 tratamentos e com número variável de repetições, sendo a unidade experimental o cordeiro. Os pesos foram iguais entre os diferentes tratamentos nas pesagens iniciais, apresentando diferença significativa apenas no peso final, onde os cordeiros que foram alimentados com a dieta contendo concentrado, independente do nível, apresentaram rendimento semelhante (P>0,05) e superior (P<0,05) a dieta que recebeu apenas gliricídia. Os ganhos médios de cordeiros foram maiores (P<0,05) para os animais que receberam concentrado em relação aos demais tratamentos. Para peso vivo antes e depois do jejum, os animais dos tratamentos que consumiam concentrado, obtiveram pesos maiores (P<0,05) que o tratamento onde os animais não consumiam concentrado. As perdas no jejum não foram diferentes (P>0,05) entre os tratamentos. Os pesos de carcaça quente e fria foram maiores (P<0,05) para os animais do tratamento que não consumia silagem de gliricídia e para os cordeiros do tratamento que consumia 26,7% de concentrado em relação ao tratamento que consumia silagem de gliricídia, sendo que o tratamento que consumia 13,3% de concentrado, não apresentou diferença dos demais (P>0,05). Os rendimentos de carcaça quente e fria, tanto de fazenda quanto comercial, apresentaram diferença significativa (P<0,05) entre os tratamentos, onde os dois tratamentos onde os animais consumiam mais concentrado apresentaram valores maiores que os demais. Em relação aos cortes comerciais, carcaças oriundas de tratamentos que ingeriam concentrado tiveram pesos absolutos mais elevado para os cortes, entretanto, em relação ao peso percentual, não existiu diferença significativa (P>0,05).

A large portion of Earth¿s terrestrial surface is subject to arid climatic water stress. As in these regions the hydrological cycle and the vegetation dynamics are tightly interconnected, a coupled modeling of these two systems is needed to fully reproduce the ecosystems¿ behavior over time and to predict possible future responses to climate change. In this thesis, the performance of three parsimonious dynamic vegetation models, suitable for inclusion in an operational ecohydrological model, are tested in a semi-arid Aleppo pine forest area in the south-east of Spain. The first model considered, HORAS (Quevedo & Francés, 2008), simulates growth as a function of plant transpiration (T), evaluating environmental restraints through the transpiration-reference evapotranspiration ratio. The state variable related to vegetation is R, relative foliar biomass, which is equivalent to FAO crop coefficient (Allen et al., 1998), but not fixed in time. The HORAS model was then abandoned because of its unsatisfactory results, probably due to a poor simulation of evaporation and transpiration processes. As for the other two models, WUE-model and LUE-model, the state variable is the leaf biomass (Bl, kg dry mass m-2 vegetation cover). Both models simulate gross primary production (GPP), in the first case as a function of transpiration and water use efficiency (WUE), in the second case as a function of absorbed photosynthetically active radiation (APAR) and light use efficiency (LUE). Net primary production (NPP) is then calculated taking into account respiration. The modelling is focused particularly on simulating foliar biomass, which is obtained from NPP through an allocation equation based on the maximum leaf area index (LAI) sustainable by the system, and considering turnover. An analysis of the information offered by MODIS EVI, NDVI, and LAI products was also performed, in order to investigate vegetation dynamics in the study site and to select the best indices to be used as observational verification for models. MODIS EVI is reported in literature (Huete et al., 2002) to be highly correlated with leaf biomass. In accordance with the phenological cycle timing described for the Aleppo pine in similar climates (Muñoz et al., 2003), the EVI showed maximum values in spring and minimum values in winter. Similar results were found applying the aforementioned WUE- and LUE- models to the study area. Contrasting simulated LAI with the EVI series, the correlation coefficients rWUE = 0.45 and rLUE = 0.57 were found for the WUE-model and LUE-model respectively. Concerning NDVI, its own definition links this index to the ¿greenness¿ of the target, so that it appears highly linked to chlorophyll content and vegetation condition, but only indirectly related to LAI. Photosynthetic pigment concentrations are reported to be sensitive to water stress in Aleppo pine (Baquedano and Castillo, 2006) so, to compare the models¿ results with NDVI, the simulated LAI was corrected by plant water-stress. The resulting correlation coefficients were rWUE = 0.62 and rLUE = 0.59. Lastly, MODIS LAI and ET were found to be unreliable in the study area because very low compared to field data and to values reported in literature (e.g. Molina & del Campo, 2012) for the same species in similar climatic conditions. The performance of both WUE- and LUE- models in this semi-arid region is found to be reasonable. However, the LUE-model presents the advantages of a better performance, the possibility to be used in a wider range of climates and to have been extensively tested in literature. / Pasquato, M. (2013). Comparison of parsimonious dynamic vegetation modelling approaches for semiarid climates [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/34326 / TESIS

Sagebrush-dominated ecosystems are being transformed by wildfire, rangeland improvement techniques, and exotic plant invasions. These disturbances have substantial effects on the composition and structure of native vegetation, but the effects on ecosystem C and N dynamics are poorly understood. To examine whether differences in dominant vegetation affect the quantity and quality of plant organic matter inputs to soil, ecosystem C and N pools and rates of plant turnover were compared among historically grazed Wyoming big sagebrush, introduced perennial crested wheatgrass, and invasive annual cheatgrass communities. Since low soil moisture during the summer may inhibit the microbial colonization of plant detrital inputs and result in C-limitations to microbial growth, soils were treated with an in situ pulse of plant detritus prior to the onset of the summer dry-season, and rates of soil C and gross N cycling were compared between treated and untreated soils. Finally, because plant detritus is the dominant form of labile C input to soil microbes over a large portion of the year, the decomposition of 13C-labeled annual grass detritus was used to determine the importance of plant detritus versus soil organic matter as microbial substrate. Results revealed large differences in ecosystem C and N pools, and in the quantity of plant C and N inputs to soil among vegetation types, but differences in soil C and N cycling rates were more subtle. Plant biomass pools were greatest for sagebrush stands, but plant C and N inputs to soil were greatest in cheatgrass communities, such that rates of plant C and N turnover appeared to be accelerated in disturbed ecosystems. Earlier release of plant biomass to soil detrital pools stimulated N availability to a greater extent than C availability relative to untreated soils, and this effect could not be predicted from the C:N stoichiometry of plant detritus. Finally, in situ decomposition of cheatgrass detritus was rapid; however, there was no clear evidence of a time-lag during summer in microbial colonization of recently released plant detritus, and microbial consumption of plant detritus did not result in N-limitations to microbial growth.

The relative competitive abilities of Agropyron desertorum and Agropyron spicatum were compared using Artemisia tridentata transplants as indicator plants. Although these two tussock grasses have similar shoot growth forms and shoot physiological characteristics, they have substantial differences in their competitive abilities. Artemisia had lower survival, growth, reproduction, and water potential when transplanted into neighborhoods of A. desertorum than in neighborhoods of A. spicatum. Plant attributes associated with the differences in competitive ability were explored. Agropyron desertorum and~ spicatum have remarkably similar potential growth rates at warm soil temperatures. In a prolonged cold soil temperature treatment in the greenhouse, A. desertorum had a 66% greater aboveground relative growth rate than A. spicatum. These differences, however, were not apparent for early spring tiller growth rates in the field. Distinct differences in timing of root growth were found between the two tussock grasses. Aqropyron desertorum exhibited greater root growth during winter and early spring and invaded disturbed soil space more rapidly than A. spicatum, especially if the disturbance occurred soon after the snow had melted. Similarly, A. desertorum proliferated its roots in zones of nutrient enrichment created early in the spring sooner than A. spicatum. No differences in root growth were found between species in zones of nutrient enrichment that were created later in the growing season. Despite differences in early spring root growth, water extraction and radiophosphorus acquisition early in the spring were similar for the two grass species. Later in the spring, A. desertorum extracted more water and radiophosphorus than A. spicatum. Differences in resource extraction between the two species in a specific soil layer occurred weeks before A. spicatum, but not A. desertorurn, had obtained maximum root length. Early root growth probably provides A. desertorum an important head start over A. spicatum in soil exploration each growing season. Differences in resource extraction, however, do not become apparent between the two species of Agropyron until plant demand exceeds soil supply rate to the roots.

The distribution of male and female plants was examined in five dioecious, wind pollinated species representing five plant families and two classes (gymnosperms and angiosperms). The arid to semiarid habitats occupied by these species in northern Utah were stratified for sampling into two categories: chronically xeric and seasonally moist. Results show that for all species, males prevail on xeric microsites, while females dominate the more moist parts of each local environment. Habitat partitioning between the sexes is a strategy that maximizes seedset of females and pollen dispersal of males; it also tends to minimize intraspecific competition between the sexes.

No description available.

Usualmente la producción de sedimentos en suspensión (Qss) de un río es calculada utilizando datos de caudales medios diarios o mensuales. Considerando que la mayor Qss ocurre durante los eventos de lluvias y también que los caudales medios no son capaces de representar adecuadamente los máximos caudales, principalmente en zonas de alta variabilidad climática, la forma usual de cálculo de Qss puede subestimar esta producción. En este sentido, esta investigación buscó analizar la influencia de la variabilidad temporal de los datos de caudales en el cálculo de la producción de sedimentos. Adicionalmente fue analizada el uso de diferentes tipos de curvas de sedimentos: (i) para todo el periodo de estudio, (ii) por años hidrológicos y (iii) asociación por épocas características (húmedas, semi-húmedas y secas). El estudio fue realizado en la subcuenca del río Torata, ubicada en una zona semiárida al sur del Perú, entre 2100 y 5200 m de altitud con pendiente promedio de 21.0% y alta variabilidad climática, en especial la precipitación que se ve reflejado en los caudales, ya que en un lapso de horas puede variar de 4 a 34 m3/s. El error entre la descarga prevista y estimada para el periodo de estudio (2001-2012) utilizando los diferentes tipos de curvas fue (i) -65.85%, (ii) -15.36% y (iii) -8.74%, presentando mejora en el coeficiente de eficiencia de Nash-Sutcliffe de 0.248 para 0.500. Los resultados mostraron que la diferencia entre la descarga de sedimentos en suspensión total para el periodo calculado con caudales medias mensuales y diarias fue de -92% y -62%, ambos en comparación de producción para valores medios horarios. También fue constatado que el 99.7% de la producción de sedimentos ocurre en temporada de lluvias, inclusive, un único evento de lluvia llegó a producir 80% de la producción anual. Los resultados de esta investigación ponen en manifiesto la importancia de utilizar registros de caudales con escalas pequeñas de tiempo (minutos, horas), que puedan representar la alta variabilidad de los caudales característicos de zonas semiáridas. / The usual methods that calculate the suspended sediment flux (Qss) of rivers employ discharge mean values daily or monthly. As most of the sediments are transported during overflow events and a mean value smooths the flood peak discharge, mainly in high climatic variability areas, the usual method to evaluate the Qss might underestimate the production of river sediments. This paper reports on an analysis of the gauge influence of temporal variability on the sediment yield estimation. Additionally, the use of different types of sediment rate curves was analyzed for (i) the whole time-series data, (ii) per hydrological year, and (iii) per hydrological pattern characterization (flood, intermediary and drought). A study case was conducted in the Torata river sub-catchment, a Peruvian semi-arid area located between altitudes of 2100 and 5200 meters and whose average slope is 21%. The high climatic variability is expressed by the huge river flow amplitude, which ranges from 4 to 34 m3/s in a few hours. The errors for the sediment yield from 2001 to 2012 estimated by the different sediment rating curves were (i) -65,85%, (ii) -15,36% and (iii) -8,74%, with a 0,248 to 0,500 Nash-Sutcliffe efficiency coefficient improvement. The differences between the sediment yield in total suspension for the period calculated monthly and daily were -92% y and -62%, respectively, in comparison with the production for hourly average values. Results show that 99,7% of the sediment are produced during the flood season and a single overflow event could represent 80% of the annual sediment discharge flow. This research highlights the importance of collecting and using discharge data of a short time interval (minutes or hours) to compute and represent the overflow peaks typical of semiarid regions.

Submitted by Ricardo Cedraz Duque Moliterno (ricardo.moliterno@uefs.br) on 2016-10-17T23:44:54Z No. of bitstreams: 1 Disserta??o Amanda.pdf: 2109661 bytes, checksum: 3476eefc68886b52ab99593eb599fe29 (MD5) / Made available in DSpace on 2016-10-17T23:44:54Z (GMT). No. of bitstreams: 1 Disserta??o Amanda.pdf: 2109661 bytes, checksum: 3476eefc68886b52ab99593eb599fe29 (MD5) Previous issue date: 2016-03-18 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / Cereus jamacaruDC. is a species of Cactaceae used in folk medicine, popularly known as mandacaru. This study aimed to identify the metabolites classes quantify the phenolic content and flavonoids, evaluate the antioxidant activity, toxicity and pharmacological potential of chloroform fractions (FC) and hydromethanol (FHM) C. jamacaru root. The extracts were prepared by maceration and fractions are obtained by liquid-liquid partition. The classes of metabolites were detected by thin layer chromatography, in chemical developers. The content of phenolics, and flavonoids were determined by UV-vis spectrometry. The antioxidant activity was evaluated by the radical sequestration methods (DPPH) and ?-carotene/linoleic acid. Acute toxicity and the effect on the central nervous system by route rod test was evaluated. The antinociceptive activity was determined in tests of writhing, formalin and hot plate. The anti-inflammatory activity was carried out by the paw edema induced by carrageenan. The presence of terpenes, steroids, flavonoids, phenolic acids and amino acids was detected in the fractions. FC showed higher content of phenolics and flavonoids, and best antioxidant activity FHM analyzed by methods. Through the toxicological evaluation, it is suggested that the fractions are non-toxic orally. Regarding the antinociceptive activity, fractions reduced (p<0,001) the number of writhes and licking time in the 1? and 2? stage, at all doses tested. Fractions increased heat to the latency time (p<0,01 and p<0,001) at all doses and times observed. The anti-inflammatory activity was detected in fractions (p<0,001) in all the doses and times observed. The fractions did not affect the coordination of the animals, besides their antinociceptive and anti-inflammatory properties, with central action mechanism indicia, also showing the reduction effect of acute inflammatory processes. It is expected from this study, promote greater public awareness for the conservation and sustainable use of this species. / Cereus jamacaru DC. ? uma esp?cie de Cactaceae utilizada na medicina popular, conhecida popularmente como mandacaru.Este estudo teve como objetivo identificar as classes de metab?litos, quantificar o teor de fen?licos e flavonoides, avaliar a atividade antioxidante,toxidade e potencial farmacol?gico das fra??es clorof?rmica (FC) e hidrometan?lica (FHM) da raiz de C. jamacaru. Os extratos foram preparados por macera??o e as fra??esforam obtidas por parti??o l?quido-l?quido. As classes de metab?litos foram detectadas por cromatografia em camada delgada, em reveladores qu?micos. Os teores de fen?licos e flavonoides foram determinados por espectrometria no UV-vis. A a??o antioxidante foi avaliada pelos m?todos de sequestro do radical (DPPH) e ?-caroteno/?cido linoleico. Foi avaliado a toxidade aguda e o efeito sobre o sistema nervoso central pelo teste do rota rod. A atividade antinociceptiva foi apurada nos testes das contor??es abdominais, formalina e placa quente.A atividade anti-inflamat?ria foi realizada pelo teste do edema de pata induzido por carragenina. A presen?a de terpenos, esteroides, flavonoides, ?cidos fen?licos e amino?cidos foi detectada nas fra??es.A FC apresentou maior conte?do de fen?licos e flavonoides, e melhor atividade antioxidante que a FHM pelos m?todos analisados.Atrav?s da avalia??o toxicol?gica realizada, sugere-se que as fra??es s?o at?xicas por via oral. Em rela??o ? atividade antinociceptiva, as fra??es reduziram (p<0,001) o n?mero de contor??es e o tempo de lambida na 1? e 2? fase, em todas as doses testadas. As fra??es aumentaram o tempo de lat?ncia ao calor (p<0,01 e p<0,001) em todas as doses e tempos observados. A atividade anti-inflamat?ria foi evidenciada nas fra??es (p<0,001), em todas as doses e tempos observados.As fra??es n?o afetaram a coordena??o motora dos animais, al?m de possu?rem propriedades antinociceptivas e anti-inflamat?ria, com ind?cios de mecanismo de a??o central, apresentando tamb?m efeito na redu??o dos processos inflamat?rios agudos.Espera-se, a partir desse estudo, propiciar uma maior conscientiza??o da popula??o para a conserva??o e uso sustent?vel desta esp?cie.

Submitted by Ricardo Cedraz Duque Moliterno (ricardo.moliterno@uefs.br) on 2017-07-19T00:20:38Z No. of bitstreams: 1 DISSERTA??O_MILVIA.pdf: 24309575 bytes, checksum: ea488eca029da38ea2ef27def0f40641 (MD5) / Made available in DSpace on 2017-07-19T00:20:38Z (GMT). No. of bitstreams: 1 DISSERTA??O_MILVIA.pdf: 24309575 bytes, checksum: ea488eca029da38ea2ef27def0f40641 (MD5) Previous issue date: 2015-07-01 / Funda??o de Amparo ? Pesquisa do Estado da Bahia - FAPEB / The environmental dimension into the planning is critical to managing and planning territories. The materialization of the natural heritage, of shapes, anthropogenic uses, occupations and equilibrium states or instability, manifested in the landscape. The interaction nature and society fosters an understanding of the environmental system, given the interdependence of the landscape of the constituent components (physical, biological and human), translate patterns that demonstrate levels of aggradation and / or degradation resulting from human interventions. The vulnerability processes, point degree of exposure and extent of the environmental system in relation to factors interfering elements and processes homeostasis and their resilience, against external impacts and negative imbalances in the natural cycle, which according to ecodynamics (TRICART, 1977), show the picture of stability / instability of biotic components, abiotic and man-made, integrated into the landscape through matter and energy exchanges. In this sense, it analyzed in the survey, environmental vulnerability of the Sisal Territory (Bahia), constituted by the State Law No. 10,705 / 2007, from a systemic perspective of environmental approach. The unit-bounds in 20 municipalities - Araci, Baroque, Biritinga, Candeal, Cansan??o, Concei??o do Coit?, Ichu, Iti?ba, Lamar?o, Monte Santo, Northeast, Burning, Quijingue, Retirol?ndia, Santaluz, Santo Domingo, Serrinha Toucan Teofil?ndia and Valente, which are inserted into the semi-arid, with the occurrence of caatingas, Savannas, pediplanos, trays and representativeness of the River Basin Itapicuru. By using geoprocessing techniques, the organization of georeferenced spatial database with natural and socioeconomic variables, the use of mapping and coverage of land, the field survey and models integrated by fuzzy logic, it became clear that the East Territory Sisal has the largest environmental vulnerability levels, caused by intercropping between lithological composition, soil structure, slope and shape of the terrain, deforestation of biomes and especially agricultural activities of subsistence and extensive cattle, which are constitute a driving force to the degradation of the natural heritage site. / A dimens?o ambiental dentro do planejamento ? fundamental para a gest?o e ordenamento de territ?rios. A materializa??o do patrim?nio natural, das formas, dos usos antr?picos, das ocupa??es e dos estados de equil?brio ou instabilidade, manifesta-se na paisagem. A intera??o natureza-sociedade favorece a compreens?o do sistema ambiental, haja vista que a interdepend?ncia dos componentes constituintes da paisagem (f?sicos, biol?gicos e humanos), traduz padr?es, que demonstram n?veis de agrada??o e/ou degrada??o decorrentes das interven??es antr?picas. Os processos de vulnerabilidade apontam graus de exposi??o e extens?o do sistema ambiental em rela??o aos fatores, elementos e processos de interfer?ncia em sua homeostase e em sua capacidade de resili?ncia, frente a impactos negativos externos e desequil?brios nos ciclos naturais que, de acordo com a ecodin?mica (TRICART, 1977), indicam o quadro de estabilidade/instabilidade dos componentes bi?ticos, abi?ticos e antr?picos integrados na paisagem atrav?s de trocas de mat?ria e energia. Neste sentido, analisou-se na pesquisa, a vulnerabilidade ambiental do Territ?rio do Sisal (Bahia), constitu?do pela Lei Estadual n? 10.705/2007, a partir de uma perspectiva sist?mica de abordagem ambiental. A unidade delimita-se em 20 munic?pios ? Araci, Barrocas, Biritinga, Candeal, Cansan??o, Concei??o do Coit?, Ichu, Iti?ba, Lamar?o, Monte Santo, Nordestina, Queimadas, Quijingue, Retirol?ndia, Santaluz, S?o Domingos, Serrinha, Tucano, Teofil?ndia e Valente, os quais se encontram inseridos no semi?rido, com a ocorr?ncia de caatingas, cerrados, pediplanos, tabuleiros e representatividade da Bacia Hidrogr?fica do Rio Itapicuru. Atrav?s das t?cnicas de geoprocessamento, a organiza??o de banco de dados espaciais georreferenciados, com vari?veis naturais e socioecon?micas, o mapeamento de uso e cobertura das terras, o levantamento de campo e os modelos integrados pela l?gica fuzzy, evidenciou-se que o leste do Territ?rio do Sisal possui os maiores n?veis de vulnerabilidade ambiental, causadas pela consorcia??o entre a composi??o litol?gica, a estrutura dos solos, a declividade e forma do terreno, o desmatamento dos biomas e, principalmente, as atividades agr?colas de subsist?ncia e pecu?ria extensiva, as quais se configuram como for?a motriz ? degrada??o do patrim?nio natural local.

Submitted by Ricardo Cedraz Duque Moliterno (ricardo.moliterno@uefs.br) on 2018-01-30T22:06:24Z No. of bitstreams: 1 Disserta??o Mileide Coutinho_P?s_Defesa_COMPLETO_VERSAO_FINAL.pdf: 2079669 bytes, checksum: 16f275e93cd170ec8dbe5989847d2cf3 (MD5) / Made available in DSpace on 2018-01-30T22:06:24Z (GMT). No. of bitstreams: 1 Disserta??o Mileide Coutinho_P?s_Defesa_COMPLETO_VERSAO_FINAL.pdf: 2079669 bytes, checksum: 16f275e93cd170ec8dbe5989847d2cf3 (MD5) Previous issue date: 2017-06-20 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / The cultivation of potential fruit species in the semiarid region, using a hydroponic system, arises in an attempt to diversify and boost the economy, especially small and medium producers in this region. However, studies are needed to evaluate the growth, productivity and adaptation of these species. The objective of this study was to evaluate the growth and nutritional profile of Physalis peruviana in a hydroponic floating system, considering different levels of salinity of the water artificially produced with NaCl. The experiment was carried out in a protected environment (greenhouse), where a randomized block design (RBD) was used, with four blocks, being tested five concentrations of salinity: 0; 20; 30; 40 and 60 mM NaCl. At each interval of 10 days, the following measurements were obtained: stem and root lengths, total leaf area and neck diameter and dry matter masses of plants. After 48 days of treatment, in addition to the growth analyzes, the nutrient contents of the leaves were quantified. Data were submitted to analysis of variance and analyzed by means test and regression curves. Leaf nutrient contents were only descriptive. Within the expected, the salinity of the medium restricted the growth of plants of fis?lis. The variables total dry mass (TDM), absolute growth rate (AGR) and number of leaves (NL) were those that suffered the greatest reductions with the increase of the salinity of the medium. In relation to the leaf nutrient profile, it was observed that the higher the Na + and Cl- concentration in the leaves, the lower the K +, Ca2 + and Mg2+ concentrations. According to the data of total dry mass, it was possible to determine the P. peruviana salinity tolerance index (STI), which presented mean values> 70% in most of the experimental period at concentrations of 20 and 30 mM, demonstrating that P. peruviana species is moderately tolerant to salinity. In addition, it was considered in this work that high NaCl levels led to a nutritional imbalance, where sodium ion was the main cause of interferences during growth. / O cultivo de esp?cies frut?feras potenciais na regi?o semi?rida, utilizando sistema hidrop?nico surge na tentativa de diversificar e impulsionar a economia, principalmente de pequenos e m?dios produtores desta regi?o. No entanto s?o necess?rios estudos que avaliem o crescimento, produtividade e adapta??o destas esp?cies. O presente trabalho teve como objetivo avaliar o crescimento e o perfil nutricional da Physalis peruviana em sistema hidrop?nico do tipo floating, considerando diferentes n?veis de salinidade da ?gua produzidos artificialmente com NaCl. O experimento foi realizado em ambiente protegido (estufa), onde foi empregado o delineamento em blocos casualisados (DBC), com 4 blocos, sendo testadas cinco concentra??es de salinidade: 0; 20; 30; 40 e 60 mM de NaCl. A cada intervalo de 10 dias foram obtidas as seguintes medidas: comprimentos do caule e da raiz, ?rea foliar total e di?metro do colo e as massas de mat?ria seca das plantas. Ap?s 48 dias de tratamento al?m das an?lises de crescimento foram quantificados os conte?dos de nutrientes minerais das folhas. Os dados foram submetidos a an?lise de vari?ncia e analisados mediante teste de m?dias e por curvas de regress?o. Os teores dos nutrientes foliares foram apenas descritivos. Dentro do esperado, a salinidade do meio restringiu o crescimento de plantas de fis?lis. As var?veis massa seca total (MST), taxa de crescimento absoluto (TCA) e n?mero de folhas (NF) foram aquelas que sofreram as maiores redu??es com o incremento da salinidade do meio. Em rela??o ao perfil de nutrientes foliares, constatou-se que quanto maior a concentra??o de Na+ e Cl- nas folhas, menores as de K+, Ca2+ e Mg2+. De acordo com os dados de massa seca total foi poss?vel determinar o ?ndice de toler?ncia ? salinidade (ITS) de P. peruviana, que apresentou valores m?dios >70% na maior parte do per?odo experimental nas concentra??es de 20 e 30 mM, demonstrando que a esp?cie P. peruviana ? moderadamente tolerante a salinidade. Al?m disso, considerou-se neste trabalho que altos n?veis de NaCl levaram a um desbalan?o nutricional nas plantas, onde o ?on s?dio foi o principal causador das interfer?ncias durante o crescimento.