Data/hora: 05/06/2024 13:57:25

Biblioteca(s): | Embrapa Arroz e Feijão.
Data corrente: | 17/10/2013
Data da última atualização: | 26/03/2014
Autoria: | FAGERIA, N. K.; MOREIRA, A.; SANTOS, A. B. dos.
Afiliação: | NAND KUMAR FAGERIA, CNPAF; ADONIS MOREIRA, CNPSO; ALBERTO BAETA DOS SANTOS, CNPAF.
Título: | Phosphorus uptake and use efficiency in field crops.
Ano de publicação: | 2013
Fonte/Imprenta: | Journal of Plant Nutrition, New York, v. 36, n. 13, p. 2013-2020, Nov. 2013.
ISSN: | 0190-4167
DOI: | 10.1080/01904167.2013.816728
Idioma: | Inglês
Conteúdo: | Phosphorus (P) is required by crop plants for many physiological and biochemical functions. Knowledge of phosphorus uptake and its use by crop plants is essential for adequate management of this essential nutrient. A field experiment was conducted during four consecutive years to determine P uptake and use efficiency by upland rice, dry bean, corn and soybean grown in rotation on a Brazilian Oxisol. Plant samples were taken at different growth stages during the growth cycle of each crop for phosphorus analysis. Phosphorus concentration (content per unit dry matter) significantly decreased in a quadratic fashion with the advancement of plant age in four crop species. Phosphorus concentration was higher in legumes compared to cereals. Phosphorus uptake in shoot, however, significantly increased in an exponential quadratic fashion with the advancement of plant age of crop species. At harvest, P uptake was higher in grain compared to shoot, indicating importance of this element in improving crop yields. Phosphorus use efficiency (grain or straw yield per unit P uptake) was higher in cereals compared to legumes. The P use efficiency for grain production was 465 kg kg&#8722;1for upland rice, 492 kg kg&#8722;1for corn, 229 kg kg&#8722;1for dry bean and 280 kg kg&#8722;1for soybean. The higher P use efficiency in cereals was associated with higher yield of cereals compared to legume species
Thesagro: | Cultivo anual; Fósforo.
Thesaurus Nal: | Phosphorus.
Categoria do assunto: | P Recursos Naturais, Ciências Ambientais e da Terra
Registro original: | Embrapa Arroz e Feijão (CNPAF)
Exemplares: | CNPAF - (32358-1) - UPC - AP - DD - 2013.059 -  - 2013.059 - DIS