105 resultados para Sobressemeadura a lanço


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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Agronomia - FEIS

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In tropical regions there is rapid decomposition of plant material deposited on the soil, and the ability to recycle nutrients through this decomposition is one of the most important aspects of cover crops. The aim of this study was to evaluate the yield and nutrient release from forage crops intercropped with maize for silage, and soybean in succession. The study was conducted in the experimental area of Universidade Estadual Paulista, Ilha Solteira campus, Brazil. The experiment consisted of maize for silage intercropped with four forage species (Urochloa brizantha cv. Marandu, Urochloa ruziziensis, Panicum maximum cv. Tanzania, and Panicum maximum cv. Aries) sown in three modalities: in the maize row, together with fertilizer; broadcast at maize sowing; and broadcast in the V4 stage of maize, in a randomized block design in a 4 x 3 factorial arrangement with four replications. The evaluation of nutrient release was performed during the soybean cropping that followed the intercropping by the litter bag method at 30, 60, 90, and 120 days after sowing of soybean. Panicum maximum cv. Tanzania showed higher dry matter yield when sown by broadcasting at maize sowing. Sowing of forages in the maize row, and through broadcasting at maize sowing led to greater dry matter yield for straw formation. Intercropping of maize with forages in the autumn is an alternative for increasing the amount of straw and cycling of macronutrients in a no-till system. Potassium was the nutrient with the greatest accumulation in the forage straws (up to 150 kg ha(-1)), with 100 % release at 90 days after sowing soybean. The forage straws are thus an excellent alternative for cycling of this nutrient. Panicum maximum cv. Tanzania sown by broadcasting at the time of maize sowing showed greater phosphorus cycling (13 kg ha(-1)). Panicum maximum cv. Tanzania broadcast in the V4 stage of maize is the option with least potential for straw production and nutrient cycling, while the other options (forages and sowing modalities) have higher potential for use, at the criteria of machine availability for setting up intercropping with corn.

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The success of conservation systems such as no-till depends on adequate soil cover throughout the year, which is possible through the use of cover crops. For this purpose the species belonging to the genus Urochloa has stood out by virtue of its hardiness and tolerance to drought. Aiming ground cover for the no-till system, the objective was to evaluate the establishment of two species of the genus Urochloa, in three sowing methods, in the weed suppression and the sensitivity of these forages to glyphosate. The study design was a randomized block with a 2 x 3 x 3 factorial arrangement, in which factor A was composed of Urochloa ruziziensis and Urochloa hybrid CIAT 36087 cv. Mulato II, factor B was formed by sowing methods: sown without embedding, sown with light embedding and sown in rows, and factor C was composed of three doses of glyphosate (0.975, 1.625 and 2.275 kg ha(-1) of acid equivalent). For determination of weed suppression, assessment of biomass yield and soil cover was performed, by brachiaria and weeds, at 30, 60, 90, 120 and 258 days after sowing. Visual assessment of the desiccation efficiency at 7 and 14 days after herbicide application was performed. It is concluded that embedding Urochloa seeds stands out in relation to sowing in the soil surface. Urochloa ruziziensis is more efficient in the dry weight yield, weed suppression, in addition to being more sensitive to glyphosate herbicide.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Agronomia - FEIS

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Mode of access: Internet.

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Mode of access: Internet.

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On this paper, I propose a reflexion on the formation of a youth maroon, as a political subject , based on experience, personal expectations and social projects in the construction of a political identity in the community quilombola Capoeiras, which is located in the district of Macaíba (RN). I observed two social situations; the projects of the Pau-furado Youth and the Swingueira Quilombola , those kinds of dances that have as protagonists or as audience the youth people who lives in the community here mentioned, those people that legitimize and innovate in these traditions and roles they play and crucial positions in the construction of ethnic identities and generation within a political community. It seeks to understand the place of youth in this new context of political affirmation and identity. It is, therefore, to understand the diversity in their local youth from different social, cultural, political and economic

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On this paper, I propose a reflexion on the formation of a youth maroon, as a political subject , based on experience, personal expectations and social projects in the construction of a political identity in the community quilombola Capoeiras, which is located in the district of Macaíba (RN). I observed two social situations; the projects of the Pau-furado Youth and the Swingueira Quilombola , those kinds of dances that have as protagonists or as audience the youth people who lives in the community here mentioned, those people that legitimize and innovate in these traditions and roles they play and crucial positions in the construction of ethnic identities and generation within a political community. It seeks to understand the place of youth in this new context of political affirmation and identity. It is, therefore, to understand the diversity in their local youth from different social, cultural, political and economic

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Objetivou-se avaliar e comparar os atributos da carcaça e da carne de novilhos Hereford terminados em ambientes pastoris naturais com ou sem aporte de insumos externos no Sul do Brasil.

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Objetivou-se avaliar as características da carcaça e da carne de novilhos Hereford em diferentes sistemas de terminação. Utilizou-se animais castrados e desmamados, submetidos a três sistemas alimentares