Data/hora: 07/06/2024 14:20:35

Biblioteca(s): | Embrapa Arroz e Feijão.
Data corrente: | 31/10/2013
Data da última atualização: | 21/01/2019
Autoria: | FAGERIA, N. K.; FERREIRA, E. P. B.; BALIGAR, V. C.; KNUPP, A. M.
Afiliação: | NAND KUMAR FAGERIA, CNPAF; ENDERSON PETRONIO DE BRITO FERREIRA, CNPAF; V. C. BALIGAR, USDA; ADRIANO MOREIRA KNUPP, CNPAF.
Título: | Growth of tropical legume cover crops as influenced by nitrogen fertilization and rhizobia.
Ano de publicação: | 2013
Fonte/Imprenta: | Communications in Soil Science and Plant Analysis, New York, v. 44, n. 21, p. 3103-3119, 2013.
ISSN: | 0010-3624
DOI: | 10.1080/00103624.2013.832283
Idioma: | Inglês
Conteúdo: | Tropical legume cover crops are important components in cropping systems because of their role in improving soil quality. Information is limited on the influence of nitrogen (N) fertilization on growth of tropical legume cover crops grown on Oxisols. A greenhouse experiment was conducted to evaluate the influence of N fertilization with or without rhizobial inoculation on growth and shoot efficiency index of 10 important tropical cover crops. Nitrogen treatment were (i) 0 mg N kg&#8722;1 (control or N0), (ii) 0 mg N kg&#8722;1 + inoculation with Bradyrhizobial strains (N1), (iii) 100 mg N kg&#8722;1 + inoculation with Bradyrhizobial strains (N2), and (iv) 200 mg N kg&#8722;1 of soil (N3). The N × cover crops interactions were significant for shoot dry weight, root dry weight, maximal root length, and specific root length, indicating that cover crop performance varied with varying N rates and inoculation treatments. Shoot dry weight is considered an important growth trait in cover crops and, overall, maximal shoot dry weight was produced at 100 mg N kg&#8722;1 + inoculation treatment. Based on shoot dry-weight efficiency index, cover crops were classified as efficient, moderately efficient, and inefficient in N-use efficiency. Overall, the efficient cover crops were lablab, gray velvet bean, jack bean, and black velvet bean and inefficient cover crops were pueraria, calopo, crotalaria, smooth crotalaria, and showy crotalaria. Pigeonpea was classified as moderately efficient in producing shoot dry weight.
Thesagro: | Fertilizante nitrogenado; Planta de cobertura; Rhizobium; Solo.
Categoria do assunto: | P Recursos Naturais, Ciências Ambientais e da Terra
Registro original: | Embrapa Arroz e Feijão (CNPAF)
Exemplares: | CNPAF - (32370-1) - UPC - AP - DD - 2013.061 -  - 2013.061 - DIS