Physical and chemical characterization of three nectarine cultivars in the zona da mata of Minas Gerais
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Brazilian Journal of Sustainable Agriculture
Abstract
O objetivo do trabalho foi avaliar o desempenho agronômico do milho nos sistemas orgânico e tradicional em plantio direto durante três anos agrícolas consecutivos. Os tratamentos avaliados foram: PDT1 (plantio direto tradicional sem adubação); PDT2 (plantio direto tradicional + adubação mineral + herbicida); PDT3 (plantio direto tradicional + adubação com composto orgânico + herbicida); PDO1 (plantio direto + adubação com composto orgânico + roçada); PDO2 (plantio direto + adubação com composto orgânico + consórcio com feijão-de-porco na densidade de três plantas por metro linear + roçada); PDO3 (plantio direto + adubação com composto orgânico + consórcio com feijão-de-porco na densidade de seis plantas por metro linear + roçada); e PDO4 (plantio direto + adubação com composto orgânico + consórcio com feijão-de-porco deixado na área, ciclo de 190 dias, na densidade de seis plantas por metro linear + roçada). Conclui-se que o consórcio do feijão-de-porco com o milho, na maior densidade, proporcionou incremento na produtividade de grãos; sendo esse consórcio eficiente para reduzir a massa seca das plantas daninhas; o prolongamento do ciclo da leguminosa proporcionou aumento da matéria seca no sistema e provavelmente maior sincronia entre a disponibilidade de N e a demanda das plantas de aveia preta.
The purpose of this work was to evaluate the agricultural performance of the corn in the organic and traditional systems of no-tillage cultivation during three consecutive agricultural years. The treatments evaluated were: PDT1 (traditional no-tillage cultivation without fertilization); PDT2 (traditional no-tillage cultivation + mineral fertilization + herbicide); PDT3 (traditional no-tillage cultivation + fertilization with organic compounds + herbicide); PDO1 (no-tillage cultivation + fertilization with organic compounds + mowing); PDO2 (no-tillage cultivation + fertilization with organic compounds + intercropping with jack-bean at the density of 3 plants per linear meter + mowing); PDO3 (no-tillage cultivation + fertilization with organic compounds + intercropping with jack-bean at the density of 6 plants per linear meter + mowing);and PDO4 (no-tillage cultivation + fertilization with organic compounds + intercropping with Jack-bean left in the area, cycle of 190 days, at the density of 6 plants per linear meter + mowing). It was concluded that the intercropping of the jack-bean with the corn at the highest rate provided increment in the grains productivity; this intercropping was efficient to reduce the dry mass of the weed: the prolongation of the legume cycle provided increase of the dry matter in the system and probably a higher synchrony between the availability of N and the demand from the plants of black oat.
The purpose of this work was to evaluate the agricultural performance of the corn in the organic and traditional systems of no-tillage cultivation during three consecutive agricultural years. The treatments evaluated were: PDT1 (traditional no-tillage cultivation without fertilization); PDT2 (traditional no-tillage cultivation + mineral fertilization + herbicide); PDT3 (traditional no-tillage cultivation + fertilization with organic compounds + herbicide); PDO1 (no-tillage cultivation + fertilization with organic compounds + mowing); PDO2 (no-tillage cultivation + fertilization with organic compounds + intercropping with jack-bean at the density of 3 plants per linear meter + mowing); PDO3 (no-tillage cultivation + fertilization with organic compounds + intercropping with jack-bean at the density of 6 plants per linear meter + mowing);and PDO4 (no-tillage cultivation + fertilization with organic compounds + intercropping with Jack-bean left in the area, cycle of 190 days, at the density of 6 plants per linear meter + mowing). It was concluded that the intercropping of the jack-bean with the corn at the highest rate provided increment in the grains productivity; this intercropping was efficient to reduce the dry mass of the weed: the prolongation of the legume cycle provided increase of the dry matter in the system and probably a higher synchrony between the availability of N and the demand from the plants of black oat.