Made available in DSpace on 2014-06-11T19:30:26Z (GMT). No. of bitstreams: 0 Previous issue date: 2006-12-21Bitstream added on 2014-06-13T21:01:05Z : No. of bitstreams: 1 farinelli_r_dr_botfca.pdf: 666519 bytes, checksum: 0ab66dde449f4b31b9043d97dd6078ce (MD5) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / O feijão é um dos alimentos produzidos em maior quantidade em todo território nacional, sendo intensa a busca por cultivares produtivas, adaptadas ao local de cultivo e com características culinárias. Assim, desenvolveu-se um trabalho de pesquisa na Fazenda Experimental Lageado, pertencente à Faculdade de Ciências Agronômicas, campus de Botucatu (SP), com o objetivo de avaliar o comportamento de genótipos de feijoeiro, quanto às características agronômicas e tecnológicas visando obter informações sobre aqueles que apresentem melhor desempenho produtivo e qualidade de grãos. O experimento foi desenvolvido em três safras, correspondendo a época da seca 2005, das águas 2005 e época da seca 2006. O delineamento experimental utilizado foi o de blocos casualizados, com 24 tratamentos, representados pelos genótipos de feijoeiro (grupo comercial carioca e preto), com quatro repetições. Todos os genótipos de feijoeiro apresentaram desempenho agronômico e tecnológico satisfatório, destacando-se os genótipos Gen 96A28-P7-1-1-1-1, Pérola, OP-S-16, OP-NS-331, Gen 96A28-P4-1-1-1-1 e CNFC 8065 quanto ao número de vagens por planta, massa de 100 grãos, renda e conseqüentemente maior produtividade de grãos. Também sobressaíram-se os genótipos Gen 96A10 e CNFC 9484 em relação ao teor de proteína bruta, tempo de cozimento e capacidade de hidratação dos grãos de feijão. / The common bean is one of foods produced in bigger amount in all national territory, being intense the search for yield cultivars, adaptability and desirable technological characteristics. The research was carried out on the Experimental Lageado Farm, which belongs to FCA/UNESP, campus of Botucatu (SP), with objective of evaluating the behavior of common bean genotypes, how the agronomic and technological characteristics aiming at to select those that better yield performance and quality of grains. The experiment was developed in three harvests, having corresponded the dry growing season 2005, summer 2005 and dry 2006. The experimental design used was randomized blocks, with 24 treatments, represented for the common bean genotypes, with four replications. All the common bean genotypes had presented satisfactory agronomic and technological performance, being distinguished the genotypes Gen 96A28-P7-1-1-1-1, Pérola, OP-S-16, OP-NS-331, Gen 96A28-P4-1-1-1-1 e CNFC 8065 how the number of pods for plant, 100 grains mass, rend and yield. Also had been distinguished the genotypes Gen 96A10 and CNFC 9484 in relation the protein content, cooking time and hydration capacity of the grains.

Orientador: Leandro Borges Lemos / Banca: Carlos Alexandre C. Crusciol / Banca: Domingos Fornasieri Filho / Banca: Sérgio Augusto Morais Carbonell / Banca: Orivaldo Arf / Resumo: O feijão é um dos alimentos produzidos em maior quantidade em todo território nacional, sendo intensa a busca por cultivares produtivas, adaptadas ao local de cultivo e com características culinárias. Assim, desenvolveu-se um trabalho de pesquisa na Fazenda Experimental Lageado, pertencente à Faculdade de Ciências Agronômicas, campus de Botucatu (SP), com o objetivo de avaliar o comportamento de genótipos de feijoeiro, quanto às características agronômicas e tecnológicas visando obter informações sobre aqueles que apresentem melhor desempenho produtivo e qualidade de grãos. O experimento foi desenvolvido em três safras, correspondendo a época da seca 2005, das águas 2005 e época da seca 2006. O delineamento experimental utilizado foi o de blocos casualizados, com 24 tratamentos, representados pelos genótipos de feijoeiro (grupo comercial carioca e preto), com quatro repetições. Todos os genótipos de feijoeiro apresentaram desempenho agronômico e tecnológico satisfatório, destacando-se os genótipos Gen 96A28-P7-1-1-1-1, Pérola, OP-S-16, OP-NS-331, Gen 96A28-P4-1-1-1-1 e CNFC 8065 quanto ao número de vagens por planta, massa de 100 grãos, renda e conseqüentemente maior produtividade de grãos. Também sobressaíram-se os genótipos Gen 96A10 e CNFC 9484 em relação ao teor de proteína bruta, tempo de cozimento e capacidade de hidratação dos grãos de feijão. / Abstract: The common bean is one of foods produced in bigger amount in all national territory, being intense the search for yield cultivars, adaptability and desirable technological characteristics. The research was carried out on the Experimental Lageado Farm, which belongs to FCA/UNESP, campus of Botucatu (SP), with objective of evaluating the behavior of common bean genotypes, how the agronomic and technological characteristics aiming at to select those that better yield performance and quality of grains. The experiment was developed in three harvests, having corresponded the dry growing season 2005, summer 2005 and dry 2006. The experimental design used was randomized blocks, with 24 treatments, represented for the common bean genotypes, with four replications. All the common bean genotypes had presented satisfactory agronomic and technological performance, being distinguished the genotypes Gen 96A28-P7-1-1-1-1, Pérola, OP-S-16, OP-NS-331, Gen 96A28-P4-1-1-1-1 e CNFC 8065 how the number of pods for plant, 100 grains mass, rend and yield. Also had been distinguished the genotypes Gen 96A10 and CNFC 9484 in relation the protein content, cooking time and hydration capacity of the grains. / Doutor

Lettuce is becoming an increasingly important vegetable, both as a fresh market product and a ready-to use vegetable, especially in urban areas of South Africa. Nutrient solution concentration is one of the most practical and effective ways of controlling and improving the yield and nutritional quality of crops for human consumption. However, optimal fertilizer concentration for leafy vegetables also depends on the prevailing environmental conditions. This study was carried out to determine the effects of different nutrient solution concentrations and growing seasons on growth, yield and quality of leafy lettuce. The trial was conducted in a black and white shade net structure and the nutrient concentration treatments were 1.0, 2.0, 3.0, and 4.0 mS.cm-1. Measurements taken included: leaf number, leaf area, fresh leaf mass, dry leaf mass, dry root mass, as well as chlorophyll content. The sensory evaluation procedure was only done on plant samples grown during summer and winter seasons. The results showed that growth was less affected by nutrient concentration than by growing season. Regardless of the nutrient concentration, plants grown in summer reached maturity quicker as compared to plants grown in winter. Generally, leaf number, leaf area, leaf area index, fresh leaf mass, dry leaf mass and dry root mass did not significantly increase with increasing nutrient concentrations and therefore, yield was not influenced by nutrient concentrations. Quality was influenced by nutrient concentrations during the summer-autumn seasons where increasing nutrient concentration induced increased chlorophyll content of the leaves. During the winter-spring seasons this phenomenon was not significant. The study demonstrated that growth, yield and quality of lettuce were not significantly influenced by nutrient solution concentrations of 1.0, 2.0, 3.0 and 4.0 mS.cm-1. The sensory evaluation also showed no significant differences on the colour (quality) and flavor of the lettuce samples grown during summer and winter seasons and unfortunately it was not done during autumn and spring seasons. Irrespective of the nutrient solution concentration, growth was influenced by growing season because plants grown during summer reached maturity quicker as compared to plants grown during the other seasons. / Dissertation (MInstAgrar)--University of Pretoria, 2012. / Plant Production and Soil Science / unrestricted

Five subtropical perennial grass species, Cenchrus ciliaris, a Cynodon hybrid, Digitaria eriantha subsp. eriantha, Panicum maximum and Pennisetum clandestinum, were subjected to four levels of water availability in a small plot trial under a rainshelter during the summer growing seasons of 1996/97 and 1997/98. This work was carried out on the Hatfield Experimental Farm of the University of Pretoria, Pretoria, South Africa. The average yields for the tufted species (C. ciliaris, D. eriantha and P. maximum) were lower in the 1997/98 than the 1996/97 season. C. ciliaris, however, produced the highest average yields in both seasons. The average yields of the Cynodon hybrid and P. clandestinum (creeping grasses) reacted differently, in that the average yields were higher in the 1997/98 than 1996/97 season. The dry matter yields of all five grass species at slight water deficits, were not significantly different from yields under conditions of no water shortages, when the soil profile was brought to field capacity at the beginning of the growing season. The implication hereof is, that dry matter yields can be maintained, in conditions where slight water deficits occur, if there is some water stored in the soil profile. C. ciliaris, a notable drought tolerant species, produced yields (11.7-20.0 t ha-1) under non-control conditions (W1, W2 and W3) which were comparable to yields obtained from traditionally irrigated grasses such as the Cynodon hybrid (12.0-15.8 t ha-1) and P. clandestinum (5.6-11.8 t ha-1), under control conditions (W4). P.clandestinum, D. eriantha and P. maximum tended to be better adapted to wetter conditions, while the Cynodon hybrid was also able to produce good yields under both water limiting and non-limiting conditions. Water use efficiency, regardless of the grass species, tended to be better under non-control conditions. Grasses were thus able to produce more dry matter per unit of water under conditions where water became scarce. In vitro dry matter digestibility was not negatively affected by water scarcity, while crude protein content more often than not seemed to be better under control conditions. This could be due to the uptake meganism of nutrients, in which water plays a vital role. The number of stoma per unit area was more under control than water limiting conditions. The expression of the different structures on the leaf surfaces, were not altered by the level of water availability. In the absence of water shortages, the growth rates of C. ciliaris, D. eriantha and P.maximum, were almost twice those of the Cynodon hybrid and P. clandestinum, as measured at the end of two growth cycles in an irrigated field trial. In a pot trial, under glasshouse conditions, with C. ciliaris, the Cynodon hybrid and P.clandestinum, both the level of water availability, and the level of nitrogen were varied. Regardless of species and level of nitrogen, water was still used more efficiently under non-control conditions. Higher levels of nitrogen did, however, improve water use efficiency regardless of level of water available. As with higher levels of available water, higher levels of nitrogen also improved yields. In this trial, the Cynodon hybrid and C. ciliarisalso out-yielded P. clandestinum.<,/p> In summary it can be said that C. ciliaris and the Cynodon hybrid are adapted to warm growing conditions in producing high yields regardless of the level of water available. D. eriantha, P. maximum and P. clandestinum would produce better in such growing conditions if water was not as limiting. Regardless of the species, the plants were able to use water more efficiently under non-control conditions, while in Vitro digestibility was not negatively affected by water limiting conditions. Due to the uptake mechanism of nutrients, water limiting conditions may, however, decrease the crude protein content of the grass plants. Higher levels of nitrogen had a positive impact on dry matter yields and water use efficiency. / Thesis (PhD)--University of Pretoria, 2005. / Plant Production and Soil Science / unrestricted