Ciclagem de nutrientes por plantas de cobertura e produtividade de soja e arroz em plantio direto
Carregando...
Data
2013-09
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
The objective of this work was to evaluate nutrient cycling by cover crops and its influence on
the performance of the rotation between upland rice and soybean. The crops were sown under no‐tillage, in a
Rhodic Haplustox, in the Cerrado region of the state of Goiás, Brazil. The cover crops were sown mechanically,
also under no‐tillage, after the harvest of soybean (3/25/2008) and rice (4/7/2009). A randomized complete
block design was used, split‐plotted in time, with four replicates. The treatments consisted of the following
cover crop species, besides fallow: Urochloa ruziziensis, U. brizantha, Pennisetum glaucum and U. ruziziensis
+ Cajanus cajan. The evaluation of the remaining nutrient in straw was performed at 0, 15, 30, 60, 90, and
120 days from the desiccation date of the cover crops. Urochloa ruziziensis and U. brizantha were the most
efficient in the accumulation and release of nutrients, especially potassium. Urochloa ruziziensis is the most
suited species for use as a cover crop previous to upland rice cultivation under no‐tillage. However, none of the
cover crop species significantly affect soybean grain yield.
Descrição
Palavras-chave
Brachiaria brizantha, Rotação de culturas, Brachiaria ruziziensis, Arroz de terras altas, Pennisetum glaucum, Sucessão de culturas, Brachiaria brizantha, Crop rotation, Crop succession, Brachiaria ruziziensis, Pennisetum glaucum, Upland rice
Citação
PACHECO, Leandro Pereira; BARBOSA, Juliano Magalhães; LEANDRO, Wilson Mozena; MACHADO, Pedro Luiz Oliveira de Almeida; ASSIS, Renato Lara de; MADARI, Beata Emoke; PETTER, Fabiano André. Ciclagem de nutrientes por plantas de cobertura e produtividade de soja e arroz em plantio direto. Pesquisa Agropecuária Brasileira, Brasília, v. 48, n. 9, p. 1228-1236, set. 2013.