Data/hora: 04/06/2024 03:30:23

Biblioteca(s): | Embrapa Milho e Sorgo.
Data corrente: | 22/03/2018
Data da última atualização: | 09/05/2018
Autoria: | SILVEIRA, T. C.; PREGORARO, R. F.; KONDO, M. K.; PORTUGAL, A. F.; RESENDE, A. V.
Afiliação: | Thiago C. Silveira; Rodinei F. Pegoraro; Marcos K. Kondo; ARLEY FIGUEIREDO PORTUGAL, CNPMS; ALVARO VILELA DE RESENDE, CNPMS.
Título: | Sorghum yield after liming and combinations of phosphorus sources.
Ano de publicação: | 2018
Fonte/Imprenta: | Revista Brasileira de Engenharia Agrícola e Ambiental, Campina Grande, v. 22, n. 4, p. 243-248, 2018.
DOI: | 10.1590/1807-1929/agriambi.v22n4p243-248
Idioma: | Inglês
Conteúdo: | Phosphate fertilization has increased sorghum yield, but few studies are available on sorghum production and efficient fertilizer management related to liming and phosphorus (P) sources. This work evaluates production, dry matter partitioning and agronomic efficiency (AEI) in successive sorghum cycles after application of limestone and combinations of phosphorus sources. Two cycles were conducted in sequence in the same experimental field, in a 2 x 6 factorial scheme, corresponding to soil with or without liming and six combinations of P2O5 sources: control (0 kg ha-1 P2O5), 100% Itafós natural phosphate (NP), 75% NP + 25% single superphosphate (SS), 50% NP + 50% SS, 25% NP + 75% SS and 100% SS. Pots with capacity for 8 dm3 were used in a randomized block design with four replicates. The first cycle, conducted in the summer/autumn season, reached the highest dry matter production and P accumulation in treatments with higher SS proportions, leading to higher AEI. Subsequently, in the second cycle, conducted considering only the residual phosphate fertilization of the first cycle, highest dry matter production and AEI were obtained in the treatment with 100% or higher proportions of natural phosphate in the presence of liming, most likely due to the gradual release of P.
Palavras-Chave: | Adubação fosfatada; Eficiência agronomica.
Thesagro: | Adubação; Fósforo; Matéria seca; Sorgo.
Categoria do assunto: | S Ciências Biológicas
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/174413/1/Sorghum-yield.pdf
Registro original: | Embrapa Milho e Sorgo (CNPMS)
Exemplares: | CNPMS - (28194-1) - UPC - AP - DD -  -  -  - DIS