Plant phosphorus and rice yield in an Ultisol of the humid forest zone in West Africa
作者:
K. L. Sahrawat,
M. P. Jones,
S. Diatta,
期刊:
Communications in Soil Science and Plant Analysis
(Taylor Available online 1998)
卷期:
Volume 29,
issue 7-8
页码: 997-1005
ISSN:0010-3624
年代: 1998
DOI:10.1080/00103629809370002
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Little attention has been devoted to calibrating plant tissue tests for phosphorus (P) in the field for upland rice in West Africa, although information is needed for improving crop production through efficient P nutrition. A field experiment was conducted under rainfed conditions in the 1994 season to establish the relationships between plant P content and grain yield of upland rice grown on an Ultisol, having a range in extractable P, in the humid forest zone of Ivory Coast. The critical limit of P content in the whole rice plant tops at the tillering stage, at 90% relative grain yield, was found to be 2 g kg‐1P for the four upland rice cultivars tested. Total P uptake in the biomass was significantly correlated with rice grain (r=0.81, n=20) and straw (r=0.79) yields of the cultivars.
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