Data/hora: 08/06/2024 11:46:55

Biblioteca(s): | Embrapa Arroz e Feijão; Embrapa Soja.
Data corrente: | 04/02/2014
Data da última atualização: | 18/02/2014
Autoria: | FAGERIA, N. K.; BALIGAR, V. C.; MOREIRA, A.; MORAES, L. A. C.
Afiliação: | NAND KUMAR FAGERIA, CNPAF; V. C. BALIGAR, USDA - ARS; ADONIS MOREIRA, CNPSO; LARISSA ALEXANDRA CARDOSO MORAES, CNPSO.
Título: | Soil phosphorous influence on growth and nutrition of tropical legume cover crops in acidic soil.
Ano de publicação: | 2013
Fonte/Imprenta: | Communications in Soil Science and Plant Analysis, New York, v. 44, n. 22, p. 3340-3364, 2013.
DOI: | 10.1080/00103624.2013.847954
Idioma: | Inglês
Conteúdo: | In tropical regions, use of cover crops in crop production is an important strategy in maintaining sustainability of cropping systems. Phosphorus (P) deficiency in tropical soils is one of the most yield-limiting factors for successful production of cover crops. A greenhouse experiment was conducted to evaluate influence of P on growth and nutrient uptake in 14 tropical cover crops. The soil used in the experiment was an Oxisol, and P levels used were low (0 mg P kg?1), medium (100 mg P kg?1) and high (200 mg P kg?1). There was a significant influence of P and cover crop treatments on plant growth parameters. Phosphorus X cover crops interaction for shoot dry weight, root dry weight and root length was significant, indicating different responses of cover crops to variable P levels. Based on shoot dry weight efficiency index (SDEI), legume species were classified into efficient, moderately efficient or inefficient groups. Overall, white jack bean, gray mucuna bean, mucuna bean ana and black mucuna bean were most P efficient. Remaining species were inefficient in P utilization. Macro- and micronutrient concentrations (content per unit dry weight of tops) as well as uptakes (concentration x dry weight of tops) were significantly (P < 0.01) influenced by P as well as crop species treatments, except magnesium (Mg) and zinc (Zn) concentrations. The P x crop species interactions were significant for concentration and uptake of all the macro and micronutrients analyzed in the plant tissues, indicating concentrations and uptake of some nutrients increased while others decreased with increasing P levels. Hence, there was an antagonistic as well as synergetic effect of P on uptake of nutrients. However, uptake of all the macro and micronutrients increased with increasing P levels, indicating increase in dry weight of crop species with increasing P levels. Overall, nutrient concentration and uptake in the top of crop species were in the order of nitrogen (N) > potassium (K) > calcium (Ca) > Mg > sulfur (S) > P for macronutrients and iron (Fe) > manganese (Mn) > zinc (Zn) > copper (Cu) for micronutrients. Interspecific differences in shoot and root growth and nutrient uptake were observed at varying soil P levels.
Thesagro: | Cobertura vegetal; Fósforo; Microelemento; Raíz; Solo; Solo ácido.
Thesaurus Nal: | Cover crops; Plant micronutrients; Root growth; Shoots.

Categoria do assunto:

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P Recursos Naturais, Ciências Ambientais e da Terra

Registro original: | Embrapa Arroz e Feijão (CNPAF)

Exemplares:

CNPSO - (35049-1) - UPC - AP - PP - 12129 -  - 12129 - DIS
CNPAF - (32482-1) - UPC - AP - DD - 2013.086 -  - 2013.086 - DIS