Data/hora: 25/06/2024 11:41:22

Biblioteca(s): | Embrapa Arroz e Feijão.
Data corrente: | 30/01/2006
Data da última atualização: | 14/05/2022
Autoria: | FAGERIA, N. K.; BALIGAR, V. C.; BAILEY, B. A.
Afiliação: | NAND KUMAR FAGERIA, CNPAF.
Título: | Role of cover crops in improving soil and row crop productivity.
Ano de publicação: | 2005
Fonte/Imprenta: | Communications in Soil Science and Plant Analysis, v. 36, n. 19/20, p. 2733-2757, 2005.
DOI: | https://doi.org/10.1080/00103620500303939
Idioma: | Inglês
Conteúdo: | Cover crops play an important role in improving productivity of subsequent row crops by improving soil physical, chemical, and biological properties. The objective of this article is to review recent advances in cover crops practice, in the context of potential benefits and drawbacks for annual crop production and sustained soil quality. Desirable attributes of a cover crop are the ability to establish rapidly under less than ideal conditions, provide sufficient dry matter or soil cover, fix atmospheric nitrogen (N), establish a deep root system to facilitate nutrient uptake from lower soil depths, produce organic matter with low-residue carbon/nitrogen (C/N) ratio, and absence of phytoxic or allelopathic effects on subsequent crops. Cover crops can be leguminous or nonleguminous. Leguminous cover crops provide a substantial amount of biologically fixed N to the primary crop, as well as ease of decomposition due to their low C/N ratio. Legume cover crops also possess a strong ability to absorb low available nutrients in the soil profile and can help in increasing concentration of plant nutrients in the surface layers of soil. Some nonleguminous cover crops having high N scavenger capacity compared with leguminous crops and sometimes, the growth of these scavenging grass cover crops is limited by N deficiency, growing grass/legume mixtures appears to be the best strategy in obtaining maximum benefits from cover crops.
Palavras-Chave: | Biological activities; Qualidade do solo; Sustainable system.
Thesagro: | Matéria Orgânica.
Categoria do assunto: | P Recursos Naturais, Ciências Ambientais e da Terra
Registro original: | Embrapa Arroz e Feijão (CNPAF)
Exemplares: | CNPAF - (23226-1) - UPC - AP - DD - 2005 -  - 2005 - DIS