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钾是植物的重要养分之一。由于土壤中存在着不同的矿物,因而产生钾的释放和固定,但这一过程受到很多因素的影响,其中水分状况是重要因素之一。多年来水分状况对钾素释放、固定影响的问题,受到了土壤研究者的注意,但是,到目前为止仍无一致的结论,例如Omuetiand等认为。用风干土测定的交换性钾能很好反映土壤供钾状况,而Luebs等则认为,以用新鲜潮湿土测定为好。为了更好的反映土壤当季的供钾水平,合理使用钾肥,以及发挥土壤钾素的潜力,因此这一问题的研究是有实践意义的,现将研究结果报告如下。
Potassium is one of the important nutrients in plants. Due to the presence of different minerals in the soil, which results in the release and fixation of potassium, the process is affected by many factors, of which moisture status is one of the important factors. The issue of the effects of moisture on potassium release and fixation over many years has attracted the attention of soil researchers, but so far no consistent conclusions have been reached, as Omuetiand et al. The exchangeable potassium determined by dry-earth soil can well reflect the status of potassium supply in the soil, while Luebs et al. Hold that it is better to use fresh moist soil. In order to better reflect the seasonal potassium supply level of the soil, the rational use of potash fertilizer and the potential of soil potassium, the study on this issue is of practical significance. The research results are reported as follows.