Genotypic variation for potassium uptake and utilization efficiency in wheat

被引：4

作者：

Zhang G. ^{[1
]}

Chen J. ^{[1
]}

Tirore E.A. ^{[1
]}

机构：

[1] Agronomy Department, Zhejiang Agricultural University, Hangzhou

来源：

Nutrient Cycling in Agroecosystems | 1999年 / 54卷 / 1期

关键词：

Genotypic variability; Nutrition; Potassium; Uptake efficiency; Utilization efficiency; Wheat;

D O I：

10.1023/A:1009708012381

中图分类号：

学科分类号：

摘要：

Pot and field experiments were carried out in order to study the genotypic variation in potassium uptake and utilization by winter wheat (T. aestivum L). Fifty-eight genotypes showed variation in K concentration, accumulation and potassium efficiency ratio (KER) in a field experiment. KER had significant positive correlation with grain weight per spike and harvest index (HI), and significantly negative correlation with stem K concentration at maturity. In a subsequent field experiment, three out of four genotypes, Yunmei 5, 94-18 and 94-6 differed in their KER, and had significantly higher grain yield with K application (K1) than without K application (K0). The 4th genotype Zhemei 1 showed no response to K. The yield increase due to K application was mainly due to the improvement in spike development from tillers. K concentration and accumulation in the plant varied between genotypes, K levels and plant parts. Among various plant parts, stem contained the highest K concentration and had the highest K accumulation at maturity, and changed considerably with the K level, while other plant parts remained relatively unchanged. All four genotypes had smaller KER in K1, as compared to K0, but there existed some difference in KER reduction among genotypes.

引用

页码：41 / 48

页数：7

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