• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 2
  • Tagged with
  • 2
  • 2
  • 2
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Fitossociologia de ?reas enriquecidas com o palmiteiro Euterpe edulis (martius) em paisagens alteradas da Mata Atl?ntica / Phytosociology of enriched areas with the palm cabbage plantation. Euterpe edulis (Martius) in modified views from Atlantic Forest .

Pinheiro, Marco Aur?lio Soares 30 August 2008 (has links)
Submitted by Sandra Pereira (srpereira@ufrrj.br) on 2018-01-25T12:42:16Z No. of bitstreams: 1 2007 - Marco Aur?lio Soares Pinheiro.pdf: 727221 bytes, checksum: 4a4a5210bea956397c8eb8b3c6ed9487 (MD5) / Made available in DSpace on 2018-01-25T12:42:16Z (GMT). No. of bitstreams: 1 2007 - Marco Aur?lio Soares Pinheiro.pdf: 727221 bytes, checksum: 4a4a5210bea956397c8eb8b3c6ed9487 (MD5) Previous issue date: 2008-08-30 / The present study was developed at Santuary of Silvester Life, Serra da Conc?rdia, Valen?a (RJ), aiming to collect informations which can subsidize the handling and the preservation of Euterpe edulis at the Atlantic Forest; to study the floristics and the structure of a secondary forest, which was submited to enrichment; to valuate the E. edulis development in a plantation of enrichment, and to confirm the viability of development of palm cabbage culture in impacted forestal remainings. Were used collecting of floristic and phytosociological facts in two parcels of 20x50m. It was estimated the viability of plantation of enrichment with E. edulis by analysing the growth in two parcels of 20x50m. It was established four classes of size of exposed stirps (C1= up to 0,5m; C2 from 0,5 to 1,5m; C3 from 1,3 to 3,0m and C4 from 3,0m on and with circumference at chest level (CAP) > 15cm). Each parcel was devided in ten subparcels of 10x10m, in which all palm cabbage plantation of (C4 class) had their CAP measurings and exposed etirps height taken.In each subparcel of 10x10m it was allocated a subparcel of 4,0x4,0m, where the individuals of the classes C1,C2 and C3 have had their measurings of diameter of colon, CAP and height of stirps taken. All palm cabbage were identified with aluminium plate printed in low relief and fixed with copper nails.The parcel 1 can be found at the bottom of the region nearby a stream, while the parcel 2 can be found almost 50m above the first parcel. It has been done two measurings in an interval of six months and, at the and of this period, it had been estimated the percentage of survival and of changing of class. The analyses of growth in each sample, and also between one another was done by the non parametric test of Kruskal-Wallis. The fragment was characterized by the index of similarity and diversity, by Margalef with some other seven remainings of Atlantic Forest with different degrees of impactation and distincts successional stages. It was also compared some abiotic characteristics between the fragments. The individuals of C1; C2 and C3 from parcel1 were significantly grown, speaking about the diameter of colon. The individuals of the same classes of parcel 2 have not had an expressive growth, but there have had a significative growth in height of exposed stirps for these classes. The C4 from parcel 1 were grown concerning to the CAP, but those one of the parcel 2 didn?t. Speaking about the height of stirps in both of the parcels, the growth was very significative. The percentage of survival were about 95,8% and 100% in the parcels 1 and 2, respectively. / O presente estudo foi desenvolvido no Santu?rio de Vida Silvestre, Serra da Conc?rdia, Valen?a (RJ), com o objetivo de coletar informa??es que possam subsidiar o manejo e a conserva??o de Euterpe edulis na Floresta Atl?ntica; estudar a flor?stica e a estrutura de uma floresta secund?ria submetida a enriquecimento; avaliar o desenvolvimento de E. edulis em plantio de enriquecimento e confirmar a viabilidade do desenvolvimento da cultura de palmito em remanescentes florestais impactados. Foram utilizados levantamentos flor?stico e fitossociol?gico em duas parcelas de 20x50m. Avaliou-se a viabilidade do plantio de enriquecimento com E. edulis atrav?s de an?lise de crescimento em duas parcelas de 20x50m. Foram estabelecidas quatro classes de tamanho de estipe exposta (C1=at? 0,5m; C2 de 0,5 a 1,5m; C3 de 1,3 a 3,0m e C4 acima de 3,0m e com circunfer?ncia a altura do peito (CAP) 15cm) Cada parcela foi dividida em dez subparcelas de 10x10m, onde todos os palmiteiros da classe C4 tiveram suas medidas de CAP e altura de estipe exposta tomadas. Em cada subparcela de 10x10m foi alocada uma subparcela de 4,0x4,0m, em que os indiv?duos das classes C1, C2 e C3 tiveram suas medidas de di?metro de colo, CAP e altura de estipe tomados. Todos os palmitos foram identificados com placas de alum?nio impressas em baixo relevo e afixadas com pregos de cobre. A parcela 1 se encontra em regi?o mais baixa, pr?xima ao c?rrego, enquanto que a parcela 2 se localiza cerca de 50m acima da primeira parcela. Foram feitas duas medi??es com intervalo de seis meses e, ao final deste per?odo, foram calculados os percentuais de sobreviv?ncia e de mudan?a de classe. A an?lise do crescimento em cada amostra, e tamb?m entre elas, foi feita atrav?s do teste n?o param?trico de Kruskal-Wallis. Caracterizou-se o fragmento atrav?s do ?ndice de similaridade e diversidade de Margalef com outros sete remanescentes de Mata Atl?ntica com diferentes graus de impacta??o e est?gios sucessionais distintos. Tamb?m foram comparadas algumas caracter?sticas abi?ticas entre os fragmentos. Os indiv?duos de C1, C2 e C3 da parcela 1 cresceram significativamente quanto ao di?metro de colo. Os indiv?duos das mesmas classes da parcela 2 n?o tiveram crescimento significativo, mas houve crescimento significativo em altura de estipe exposta para estas classes. Os C4 da parcela 1 cresceram quanto ao CAP, mas os da parcela 2, n?o. Quanto ? altura de estipe, em ambas as parcelas o crescimento foi significativo. Os percentuais de sobreviv?ncia foram de 95,8% e 100% nas parcelas 1 e 2, respectivamente.
2

CRESCIMENTO DE PLANTAS JOVENS DE Euterpe edulis Martius EM RESPOSTA A DIFERENTES DOSES DE FÓSFORO / GROWTH OF Euterpe edulis Martius YOUNG PLANTS DUE TO DIFFERENT PHOSPHORUS DOSES

Lima, Letícia Schlichting Hostin 28 February 2005 (has links)
Conselho Nacional de Desenvolvimento Científico e Tecnológico / The knowledge about palm (Euterpe edulis Mart.) mineral nutrition are important in the commercial scale of biomass of this specie, but there is a lack about nutritional necessities from the nursery to the production phase. The phosphorus is found in small concentrations in forest soils, affecting the vegetal species growth and production. So, the objective of this study was to evaluate the effect of phosphorus doses in the growth of young palm plants, as well as, determine the content of macro and micronutrients from the below and above ground biomass through a tissue analysis. The assay was conducted in a greenhouse. The seeds of Euterpe edulis Mart. were collected in the county of Venâncio Aires-RS. The substrate was Yellow-Reddish Argisoil collected on the first superficial layer (0 20 cm). As complement fertilizer were add 10mg Kg -1 of N and 12,5mg Kg-1 of K., the sources were (NH4)SO4 and KCL, respectively.Polypropylene vases with the capacity of 2,0 dm3 were used, which were sealed, to minimize the loss of water and nutrients. The statistical design was completely randomized with 8 treatments and 8 replicates, totalizing 64 plots. The treatments were quantitative and equidistant, constituted by: T1- control (soil without P); T2-90mg Kg-1; T3-180mg Kg-1 ; T4-270mg Kg -1;T5-360mg Kg-1; T6-450mg Kg-1; T7-540mg Kg-1; T8-630mg Kg-1 of P, respectively, using CaHPO4 as salt. The phosphorus was mixed to the soil before the sowing. After 12 months after sowing, the following variables were evaluated: above ground height, stem diameter, above ground biomass, below ground biomass, total biomass and roots length. The nutritional analysis from below and above ground biomass was done to obtain the amount of macro and micronutrients. The results show that the growth of young palm plants was achieved to the analyzed parameters, except stem diameter and root length, ranging between 450 and 540 mg de P kg-1 to the above ground height, above ground biomass and total biomass, and between 360 and 450 mg de P kg-1 to the below ground biomass. Due to the macro and micronutrients amount in the above and below ground biomass, the following sequence was established: N > Ca > K > Mg > P>S; Fe > Mn > Zn > B > Cu ; N > Ca > Mg > S > K > P; Fe > Mn > Zn > B > Cu. / Os conhecimentos de nutrição mineral de palmiteiro (Euterpe edulis Mart.) são importantes na produção em escala comercial desta espécie, no entanto faltam dados sobre sua demanda nutricional desde a fase de viveiro até a fase de produção. O fósforo encontra-se em baixa concentração nos solos tropicais, afetando o crescimento e a produção das espécies vegetais. Assim, os objetivos deste trabalho foram avaliar o efeito de dosagens de fósforo no crescimento de plantas jovens de palmiteiro, bem como, determinar o teor de macro e micronutrientes do sistema radical e aéreo destas plantas pela análise de tecidos. O ensaio foi conduzido em casa de vegetação. As sementes de Euterpe edulis Martius foram coletadas no município de Venâncio Aires, RS. O substrato utilizado foi solo do tipo argiloso-vermelho-amarelo coletado na camada superficial (0-20 cm).Como adubação complementar, foram adicionados 10mg Kg -1 de N e 12,5mg Kg-1 de K. As fontes utilizadas foram (NH4)SO4 e KCL, respectivamente.Foram utilizados vasos de polipropileno, com capacidade de 2,0 dm3 , os quais foram vedados, visando minimizar a perda de água e nutrientes. O delineamento experimental utilizado foi o inteiramente casualizado com 8 tratamentos e 8 repetições, totalizando 64 parcelas contendo uma planta cada. Os tratamentos foram quantitativos e eqüidistantes, constituídos por: T1-testemunha (solo sem adição de P); T2-90mg Kg-1; T3-180mg Kg-1 ; T4-270mg Kg -1;T5-360mg Kg-1; T6-450mg Kg-1; T7-540mg Kg-1; T8-630mg Kg-1 de P, respectivamente, utilizando CaHPO4 como sal. O fósforo foi misturado ao solo antes de ser feita à semeadura. Decorridos 12 meses da semeadura, foram avaliadas as seguintes variáveis: altura da parte aérea, diâmetro do colo, biomassa aérea, biomassa radical, biomassa total e comprimento de raízes. A análise nutricional da biomassa aérea e radical foi realizada visando a obtenção dos teores de macro e micronutrientes. Os resultados indicam que o crescimento de plantas jovens de palmiteiro (E. edulis) foi alcançado para os parâmetros avaliados, exceto diâmetro do colo e comprimento do sistema radicular, ocorrendo entre as dosagens 450 e 540 mg de P Kg-1, para altura da parte aérea, biomassa aérea e biomassa total, e entre 360 e 450 mg de P Kg-1para biomassa radical. Em relação aos teores de macro e micronutrientes na biomassa aérea e radical estabeleceu-se a seguinte seqüência respectivamente: N > Ca > K > Mg > P>S; Fe > Mn > Zn > B > Cu ; N > Ca > Mg > S > K > P; Fe > Mn > Zn > B > Cu.

Page generated in 0.0483 seconds