Zinc tolerance in wheat cultivars as affected by varying levels of phosphorus

被引:13
|
作者
Imtiaz, Muhammad [1 ]
Alloway, Brain John
Memon, Muhammad Yousuf
Khan, Parvez
Siddiqui, Saleem-ul-Haq
Aslam, Muhammad
Shah, Syed Khursheed Hussain
机构
[1] Nucl Inst Agr, Div Soil Sci, Tandojam 70060, Sindh, Pakistan
[2] Univ Reading, Dept Soil Sci, Reading, Berks, England
关键词
cultivars; efficiency; micronutrients; phosphorus; uptake; zinc;
D O I
10.1080/00103620600710363
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
The effect of zinc-phosphorus (Zn-P) interaction on Zn efficiency of six wheat cultivars was studied. The higher dry matter yields were observed when Zn was applied at 5 mu g g(-1) soil than with no Zn application. Phosphorus applications also increased dry matter yield up to the application of 25 mu g P g(-1) soil. The dry matter yield was significantly lower at the P rate of 250 mu g g(-1) soil. At the Zn-deficient level, the Zn-efficient cultivars had higher Zn concentrations in the shoots. Zinc concentrations in all cultivars increased when the P level in the soil was increased from 0 to 25 mu g P g(-1) soil except for the cv. Durati, in which Zn concentrations decreased with increases in P levels. However, when ZnxP interactions were investigated, it was observed that at a Zn-deficient level, Zn concentrations in the plant shoot decreased with each higher level of P, and more severe Zn deficiency was observed at P level of 250 mu g g(-1) soil.
引用
收藏
页码:1689 / 1702
页数:14
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