Título:	Straw degradation and nitrogen release from cover crops under no-tillage.
Autoria:	NASCENTE, A. S. CRUSCIOL, C. A. C. STONE, L. F.
Afiliação:	ADRIANO STEPHAN NASCENTE, CNPAF; CARLOS ALEXANDRE COSTA CRUSCIOL, UNESP, Botucatu-SP; LUIS FERNANDO STONE, CNPAF.
Ano de publicação:	2014
Referência:	Revista Caatinga, Mossoró, v. 27, n. 2, p. 166-175, abr./jun. 2014.
Conteúdo:	Crops used to cover the ground may also release nitrogen into the soil during mineralization. However, it is necessary to identify species that combine fast nutrient release and longer permanence of the straw on the soil surface. The aim of this study was to investigate straw degradation and nitrogen release from cover crops under no-tillage cropping systems. The field trial was performed during two growing seasons in summer (2008/2009 and 2009/2010) in the Cerrado region of Brazil. The experimental design was a randomized block in factorial arrangement. Treatments were the combination of five plants (four cover crops species, 1 - Panicum maximum, 2- Brachiaria ruziziensis, 3. Brachiaria brizantha and 4. Pennisetum glaucum [millet], and fallow as a control) with six sampling times (first six weeks after application of glyphosate on the cover crops). Pennisetum glaucum and fallow showed faster straw degradation and nitrogen release. The cover crops Panicum maximum, Brachiaria brizantha and Brachiaria ruziziensis stood out in biomass production and in the amount of nitrogen in their shoots but had the lowest coefficients of degradation and persisted longer on the soil surface than Pennisetum glaucum and fallow.
Thesagro:	Milheto Planta forrageira Plantio direto Palhada Nitrogênio Planta de cobertura
ISSN:	1983-2125
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPAF)