Data/hora: 05/06/2024 17:19:25

Biblioteca(s): | Embrapa Agricultura Digital; Embrapa Arroz e Feijão.
Data corrente: | 31/10/1994
Data da última atualização: | 24/06/2020
Autoria: | FAGERIA, N. K.; WRIGHT, R. J.; BALIGAR, V. C.; CARVALHO, J. R. P. de.
Afiliação: | NAND KUMAR FAGERIA, CNPAF; R. J. WRIGHT, USDA; V. C. BALIGAR, USDA; JOSE RUY PORTO DE CARVALHO, CNPAF.
Título: | Upland rice response to potassium fertilization on a Brazilian oxisol.
Ano de publicação: | 1990
Fonte/Imprenta: | Fertilizer Research, Dordrecht, v. 21, p. 141-147, 1990.
Idioma: | Inglês
Conteúdo: | Even though K is an essential nutrient, the response of upland rice to K fertilization under field conditions has not been adequately documented. This research was conducted to examine the influence of K fertilization on yield of upland rice (Oryza sativa L.). In the first three years, K was broadcast at rates of 0, 42, 84, 126 and 168 kg K ha-1. In the last two years K was banded at rates of 0, 25, 50, 75 and 100 kg K ha-1. The experiment was conducted on an Oxisol (Typic Haplustox) during five consecutive years. Potassium significantly increased grain yields and dry matter production but response varied from cultivar to cultivar and year to year. Drought and panicle neck blast played an important role in limiting upland rice yield response to K fertilization. Potassium application rates associated with maximum grain yield varied from 83 to 127 kg K ha-1 when K was broadcast and from 47 to 67 Kg K ha-1 when K was banded. Previous broadcast K, favorable weather and blast resistant cultivars probably contributed to higher yields with K banding in the fourth and fifth growing seasons.
Palavras-Chave: | Adubação potássica; Arroz de sequeiro; Fertilization; Soil K level; Upland rice.
Thesagro: | Arroz; Cerrado; Oryza Sativa; Oxisol; Potássio.
Thesaurus Nal: | potassium.

Categoria do assunto:

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F Plantas e Produtos de Origem Vegetal

Registro original: | Embrapa Arroz e Feijão (CNPAF)

Exemplares:

CNPTIA - (3028-1) - EMB - SP - PP -  -  - 1996.00055 - DES
CNPTIA - (3028-2) - EMB - AP - DD -  -  -  - DIS
CNPAF - (6889-1) - UPC - AP - PP - 1990 -  - 1990 - DIS