文献类型： 外文期刊
第一作者： Qian, P
作者： Qian, P;Schoenau, JJ;Li, G
作者机构：
期刊名称：COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS （ 影响因子：1.327； 五年影响因子：1.315 ）
ISSN： 0010-3624
年卷期： 1998 年 29 卷 5-6 期
页码：
收录情况： SCI
摘要： We examined soil potassium (K) supply capacity as related to wheat response to K fertilization, using a cation exchange membrane (CEM) burial technique to measure potential K supply rate. A growth chamber experiment was conducted to determine soil and plant response relationships. Canadian Prairie Spring wheat (Triticum aestivum 'Biggar') was grown on three soils of different initial K fertility with three rates of added K. Wheat response to K fertilization was well related to the amount of exchangeable K and K supply rate in the soil. Soils with high initial K supply rate demonstrated an adequate K release rate which was associated with low response to added K fertilizer. A soil K supply rate less than 5 mu g cm(2) hr(-1) represented soil K supply power that is less than optimal for wheat nutrition.
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