【摘 要】
：
按供钾能力可将四川主要土壤分为五类。第五类最好,第四类次之,其余三类均缺钾,尤以第一类最显著。速效钾80ppm,缓效钾400ppm可视为土壤缺钾的临界值。杂交水稻吸钾量约为小
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按供钾能力可将四川主要土壤分为五类。第五类最好,第四类次之,其余三类均缺钾,尤以第一类最显著。速效钾80ppm,缓效钾400ppm可视为土壤缺钾的临界值。杂交水稻吸钾量约为小麦的三倍,水稻施钾的增产率较小麦大。施钾后,稻麦千粒重平均约增2.17g。杂交水稻的钾肥利用率较小麦高3.5倍。
According to the capacity for potassium can be divided into five major types of soil in Sichuan. The fifth is the best, the fourth is the second, and the remaining three are K, especially the first is the most significant. Available potassium 80ppm, slow-acting potassium 400ppm can be regarded as the critical value of soil potassium deficiency. The amount of potassium absorbed by hybrid rice was about three times of that of wheat, and the rate of yield increase of paddy rice was larger than that of wheat. After potassium application, the average grain weight of wheat and grain increased by about 2.17g. Potassium utilization of hybrid rice is 3.5 times higher than that of wheat.
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