Título:	Dry matter decomposition of cover crops in no-tillage cotton system.
Autoria:	SILVA FILHO, J. L. da BORIN, A. L. D. C. FERREIRA, A. C. de B.
Afiliação:	JOAO LUIS DA SILVA FILHO, CNPA; ANA LUIZA DIAS COELHO BORIN, CNPA; ALEXANDRE CUNHA DE B FERREIRA, CNPA.
Ano de publicação:	2018
Referência:	Revista Caatinga, v. 31, n. 2, p. 264-270, abr./jun. 2018.
Conteúdo:	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.
Thesagro:	Algodão Gossypium Hirsutum Plantio Direto Brachiaria Guandu Cajanus Cajan
NAL Thesaurus:	Cotton No-tillage Urochloa ruziziensis Pigeon peas
ISSN:	0100-316X
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPA)