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Provedor de dados:  Repositório Alice
País:  Brazil
Título:  Dry matter decomposition of cover crops in no-tillage cotton system.
Autores:  SILVA FILHO, J. L. da
BORIN, A. L. D. C.
FERREIRA, A. C. de B.
Data:  2018-11-20
Ano:  2018
Palavras-chave:  Algodão
Gossypium Hirsutum
Plantio Direto
Brachiaria
Guandu
Cajanus Cajan
Cotton
No-tillage
Urochloa ruziziensis
Pigeon peas
Resumo:  No-tillage cotton systems require soil coverage with cover crop residue for a longer time due to the late cycle of cotton. However, decomposition rates may vary between cover crops, and the adjustment of models to describe it is critical to no-tillage cotton management. Two non-linear regression models, exponential (EM) and Michaelis-Menten (MM), were adjusted to dry matter decomposition of cover crops in a cotton no-tillage system, in Brazil. Three field trials were performed in 2012 for the cover crops Urochloa ruziziensis (brachiaria), Pennisetum glaucum (pearl millet), and Cajanus cajan (pigeon pea). Samples of cover crop were collected at 20, 50, 70, 110, 140, and 170 days after sowing upland cotton to measure dry matter decomposition. MM showed better adjustment than EM for all cover crops. The estimations of half-life parameters were different between the cover crops, suggesting that each cover crop has its own rate of decomposition. For pearl millet, brachiaria, and pigeon pea, the half-life estimation by exponential model was over the MM in 9, 12, and 12 days.

bitstream/item/186451/1/Dry-matter-decomposition.pdf
Tipo:  Artigo em periódico indexado (ALICE)
Idioma:  Inglês
Identificador:  0100-316X

28625

http://www.alice.cnptia.embrapa.br/alice/handle/doc/1099704
Editor:  Revista Caatinga, v. 31, n. 2, p. 264-270, abr./jun. 2018.
Relação:  Embrapa Algodão - Artigo em periódico indexado (ALICE)
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