CRITICAL-LEVEL OF DTPA EXTRACTABLE ZN FOR WHEAT IN ALKALINE SOILS OF SEMIARID REGION OF PUNJAB, INDIA

被引:12
作者
BANSAL, RL
TAKKAR, PN
BHANDARI, AL
RANA, DS
机构
[1] Department of Soils, Punjab Agricultural University, Ludhiana
来源
FERTILIZER RESEARCH | 1990年 / 21卷 / 03期
关键词
alkaline soils; Critical level of Zn; wheat; Zn-deficiency;
D O I
10.1007/BF01087426
中图分类号
S15 [土壤学];
学科分类号
0903 ; 090301 ;
摘要
Field experiments were conducted at 32 locations, chosen for their wide range in DTPA extractable Zn, to determine the critical deficiency level of Zn for predicting response of wheat to Zn application. Soil application of 5.6 kg Zn ha-1 significantly increased the grain yield in deficient soils. Soil extractable Zn was significantly related with per cent grain response and absolute grain yield. Both the graphical and statistical methods of Cate and Nelson indicated the critical level to be 0.75 mg kg-1 soil of DTPA extractable Zn. This level gave a predictability value of 82 per cent. © 1990 Kluwer Academic Publishers.
引用
收藏
页码:163 / 166
页数:4
相关论文
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