Data/hora: 16/06/2024 19:13:23

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.; BALIGAR, V. C.; WRIGHT, R. J.; CARVALHO, J. R. P.
Afiliação: | NAND KUMAR FAGERIA, CNPAF; V. C. BALIGAR; R. J. WRIGHT; JOSE RUY PORTO DE CARVALHO, CNPAF.
Título: | Lowland rice response to potassium fertilization and its effect on N and P uptake.
Ano de publicação: | 1990
Fonte/Imprenta: | Fertilizer Research, Dordrecht, v. 21, p. 157-162, Jan. 1990.
DOI: | 10.1007/BF01087425
Idioma: | Inglês
Conteúdo: | Not much is known about the response of lowland rice to K fertilization under Brazilian conditions. A field experiments was conducted during four consecutive years to determine the response of three lowland rice (Oryza sativa L.) cultivars to K fertilization on a Low Humic Gley soil. In the first two years, K was broadcast at rates of 0, 42, 84, 126, and 168 kg K ha-1. In the last two years K rates were reduced to 0, 25, 50, 75, and 100 kg K ha-1 and applied in a band. Potassium significantly (P < 0,01) increased grain yields but the response varied from cultivar to cultivar and year to year. Yield responses to K fertilization were superimposed on a general trend of increasing grain yields across the four growing seasons. Mean grain yields increased 14.3% with broadcast application of K in the first two years and 10.4% with banded application of K in the last two years when compared to the control treatments. Extractable soil K increased with K application rate and decreased with soil depth. Potassium was rapidly removed from the soil and yearly broadcast or banded application of K can be expected to result in a significant increase in grain yield of lowland rice in these soils.
Palavras-Chave: | Adubação potássica; Arroz de várzea; Concentração de potássio; K x cultivar interaction; Lowland rice; Potassium fertilization.
Thesagro: | Arroz; Cerrado; Oryza Sativa; Potássio.
Thesaurus Nal: | Grain yield; Potassium; Potassium fertilizers; rice.

Categoria do assunto:

F Plantas e Produtos de Origem Vegetal
X Pesquisa, Tecnologia e Engenharia

Registro original: | Embrapa Arroz e Feijão (CNPAF)

Exemplares:

CNPTIA - (3029-1) - EMB - SP - PP -  -  - 1996.00058 - DES
CNPTIA - (3029-2) - EMB - AP - DD -  -  -  - DIS
CNPAF - (6890-1) - UPC - AP - PP - 1990 -  - 1990 - DIS