Data/hora: 15/06/2024 17:58:36

Biblioteca(s): | Embrapa Arroz e Feijão; Embrapa Soja.
Data corrente: | 26/02/2014
Data da última atualização: | 04/06/2014
Autoria: | FAGERIA, N. K.; MOREIRA, A.; MORAES, L. A. C.; MORAES, M. F.
Afiliação: | NAND KUMAR FAGERIA, CNPAF; ADONIS MOREIRA, CNPSO; LARISSA ALEXANDRA CARDOSO MORAES, CNPSO; M. F. MORAES.
Título: | Root growth, nutrient uptake, and nutrient-use efficiency by roots of tropical legume cover crops as influenced by phosphorus fertilization.
Ano de publicação: | 2014
Fonte/Imprenta: | Communications in Soil Science and Plant Analysis, New York, v. 45, n. 5, p. 555-569, 2014.
ISSN: | 0010-3624
DOI: | 10.1080/00103624.2013.861908
Idioma: | Inglês
Conteúdo: | Roots are important organs that supply water and nutrients to growing plants. Data related to root growth and nutrient uptake by tropical legume cover crops are limited. The objective of this study was to evaluate root growth of tropical legume cover crops and nutrient uptake and use efficiency under different phosphorus (P) levels. The P levels used were 0 (low), 100 (medium), and 200 (high) mg kg&#8722;1 of soil, and five cover crops were evaluated. Root dry weight, maximum root length, and specific root length were significantly influenced by P and cover crop treatments. Maximum values of these root growth parameters were achieved with the addition of 100 mg P kg&#8722;1 soil. The P × cover crops interactions for all the macro- and micronutrients, except manganese (Mn), were significant, indicating variation in uptake pattern of these nutrients by cover crops with the variation in P rates. Overall, uptake pattern of macronutrients was in the order of nitrogen (N) > calcium (Ca) > potassium (K) > magnesium (Mg) > P and micronutrient uptake pattern was in the order of iron (Fe) > Mn > zinc (Zn) > copper (Cu). Cover crops which produced maximum root dry weight also accumulated greater amount of nutrients, including N, compared to cover crops, which produced lower root dry weight. Greater uptake of N compared to other nutrients by cover crops indicated that use of cover crops in the cropping systems could reduce loss of nitrate (NO3 &#8722;) from soil?plant systems. Increase in root length and root dry weight with the addition of P can improve nutrient uptake from the soil and lessen loss of macro- and micronutrients from the soil?plant systems.
Thesagro: | Cobertura vegetal; Fertilizante fosfatado; Fisiologia vegetal; Fósforo; Microelemento; Raiz; Solo ácido; Transporte de nutriente.
Thesaurus Nal: | Cover crops; Plant micronutrients; Plant physiology; Root growth; Shoots.

Categoria do assunto:

F Plantas e Produtos de Origem Vegetal
P Recursos Naturais, Ciências Ambientais e da Terra

Registro original: | Embrapa Arroz e Feijão (CNPAF)

Exemplares:

CNPAF - (32525-1) - UPC - AP - DD - 2014.028 -  - 2014.028 - DIS
CNPSO - (35076-1) - UPC - AP - PP - 12135 -  - 12135 - DIS