Influencia da temperatura de cultivo e doses de fósforo no solo na composição bioquímica de sementes de soja

• Autor(a) principal: Paula, Solange Aparecida de
• Data de Publicação: 2011
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/309
• topic: Fósforo; Soja; Temperatura; Phosphorus; Soybean; Temperature; CNPQ::CIENCIAS BIOLOGICAS::BIOQUIMICA::QUIMICA DE MACROMOLECULAS::PROTEINAS

Soybeans, a grain of high nutritional value is used as the basis for several products, so there is a growing demand for soybean cultivars with specific quality characteristics. The search for new alternatives to increase the productivity of soybeans and soy with a high nutritional value has been a constant goal of researchers and producers. The responses of the crop to the soil application of phosphorus are well defined, this nutrient is of great importance in the development of the same, implying their use in increasing the yield. Fertilization of soybeans can be influenced by several factors, including climatic conditions, the nutrient content in soil and crop management. In order to evaluate the effects of phosphorus and temperature on the quality of soybeans was conducted this research. Treatments consisted of seven levels of phosphorus (15, 30, 60, 120, 240, 480 and 960 ppm), using a randomized block design with three replications. These characteristics were: Raffinose content of oligosaccharides, phytic acid content, fatty acid content and phytase activity of myo-inositol 3 - phosphate synthase both in two stages of grain development. The variables phytic acid, raffinose oligosaccharides, palmitic acid, oleic acid, linoleic acid, linolenic acid phytase activity in the seed and mature seed 40 days, activity of myo-inositol 3-phosphate synthase in two stages, suffered a significant interaction between doses of phosphorus triple x cultivar and temperature. Sucrose, raffinose and stearic acid had a significant effect only for the interaction between cultivars and temperature. With these results we conclude that the use of appropriate fertilization coupled with the knowledge of growing conditions and cultivar can be used is a tool to obtain cultivars with improved characteristics for use of soybean in the diet.