Propriedades de pasta e concentração de amido resistente em duas variedades de féculas de raízes de mandioca em diferentes estágios de desenvolvimento

The objective of this work was to analyze the profiles of the concentrations of resistant starch and respective properties of paste of two cassava varieties with different development stages. For the evaluation of the profile of the concentration of resistant starch and paste properties, the starches of the cassava varieties were used IAC 576/70 and Fécula Branca, which were collected with different times of cultivation (10, 11, 12, 13, 14 and 15 months), and the use of these times were according the crop of cassava variety IAC 576/70. For the analysis of paste property the apparel was used RVA and for analysis of resistant starch the enzymatic method was used. The results showed for the paste properties happened significant differences among the two varieties of cassava starch, and in some months they there wasn't differences, and as the results of resistant starch happened differences among the starches the months of July and August, and as for the different development stages only the starch of Fécula Branca that happened significant differences.

Impactos do manejo de um sistema plantio direto no crescimento e produtividade do arroz de terras altas e feijão de inverno em sucessão e nos atributos do solo

Pós-graduação em Agronomia - FEIS

Estabelecimento do capim-massai em consórcio com milho AG-1051 e Bt, em áreas infestadas pelo percevejo castanho das raízes.

The system consortium of grain crops with forage plants allows the establishment of pastures resistant, vigorous and lower cost in areas infested with stink bug brown root. Maize has favorable characteristics for intercropping as high plant height and insertion height of the studs, allowing the crop to occur without interference of forage plants. Furthermore, the production system in consortium with Bt corn reduced the infestation of Spodoptera frugiperda and was not affected by Scaptocoris carvalhoi (Hemiptera: Cydnidae), The Panicum maximum cv. Massai allowed a consortium with excellent corn and pasture provided a vigorous and excellent leaf mass distribution and very deep roots in the soil. Grain yield for Bt corn was higher and significant (P <0.05), compared to other treatments. The use of Lorsban (1.5 liters / ha) and Thiodan (2.0 liters / ha) was highly effective (P <0.05) in the control of Spodoptera frugiperda and Scaptocoris carvalhoi (Hemiptera: Cydnidae).

Índice de clorofila em plantas de arroz de terras altas submetidas a estresse por alumínio e aplicação de silício

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Influência do comprimento do pino de fibra de vidro na resistência à fratura de raízes fragilizadas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Influência do comprimento do pino de fibra de vidro na resistência à fratura de raízes fragilizadas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Rastrojo de arroz (Oryza sativa L.) en sistemas de siembra directa : alternativas de manejo

Los objetivos principales del presente trabajo fueron: a) Estudiar cuál es el uso adecuado de las distintas herramientas para mejorar la mineralización del rastrojo de la cosecha de arroz (Oryza sativa L.) bajo siembra directa y b) Determinar, para períodos cortos, la cantidad de rastrojo depositado superficialmente y su tiempo de mineralización al utilizar las distintas técnicas de manejo del mismo. Los tratamientos fueron: cosechadora con desparramador deflector (T1DD), cosechadora sin desparramador triturador (T2SDT), cosechadora con desparramador centrífugo de caucho (T3DC) y cosechadora con desparramador metálico (T4DM). Alternativas implementadas: a) desmalezado b) rolo cuchilla y c) quemado de rastrojo. En las primeras dos alternativas, se aplicaron tres dosis de urea. Los resultados principales fueron: a) La T2SDT produjo, una mayor deposición de material en el centro de la máquina (21680 kg ha-1), b) la distribución de rastrojo de la (T3DC) fue más uniforme que para los otros tratamientos. Las principales conclusiones fueron: 1) Los desparramadores centrífugos de caucho y metálico produjeron mejor distribución del material, 2) El uso de desmalezadora o rolo cuchilla sobre rastrojo de los tratamientos T3DC y T4DM aceleró la mineralización de los mismos. 3) Las dosis de urea causó poco incremento en la mineralización del rastrojo.