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Provedor de dados:  PAB
País:  Brazil
Título:  Phosphorus utilization by corn as affected by green manure, nitrogen and phosphorus fertilizers
Autores:  Silva,Edson Cabral da
Franzini,Vinícius Ide
Villanueva,Felipe Carlos Alvarez
Data:  2012-08-01
Ano:  2012
Palavras-chave:  Zea mays
Cover crop
Isotopic dilution
Resumo:  The objective of this work was to evaluate the utilization by corn plants of P from triple superphosphate fertilizer labeled with 32P (32P‑TSP), and of P from soil as affected by N rates and by the green manures (GM) sunn hemp (Crotalaria juncea) and millet (Pennisetum glaucum). The experiment was carried out using pots filled with 5 kg Oxisol (Rhodic Hapludox). A completely randomized design was used, in a 4x4x2 factorial arrangement, with four replicates. The treatments were: four P rates as TSP (0, 0.175, 0.350, and 0.700 g P per pot); four N rates as urea (0, 0.75, 1.50, and 2.25 g N per pot); and sunn hemp or millet as green manure. The additions of N and P by the GM were taken into account. After grain physiologic maturation, corn dry matter, P contents, accumulated P, and P recovery in the different treatments were measured. 32P‑TSP recovery by corn increased with N increasing rates, and decreased with increasing rates of 32P‑TSP. The mineral fertilizer provides most of the accumulated P by corn plants. The recovery of 32P‑TSP by corn was 13.12% in average. The green manure species influence the assimilation of 32P‑TSP by the plants.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  Embrapa Secretaria de Pesquisa e Desenvolvimento

Pesquisa Agropecuária Brasileira
Relação:  10.1590/S0100-204X2012000800016
Formato:  text/html
Fonte:  Pesquisa Agropecuária Brasileira v.47 n.8 2012
Direitos:  info:eu-repo/semantics/openAccess

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