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近年来随着化肥产量的增加,施用化学氮肥、磷肥数量增多,一些地方出现了土壤钾素供应不足的现象。为合理施用和发挥钾肥的增产作用,现将我们近年的钾肥试验结果归纳于后,供参改。一、钾肥效果与土壤种类的关系土壤由于成土母质不同,对钾肥的效果反应也是不同的。如由含钾较低的玄武岩风化的土壤比由含钾较高的花岗岩和片麻岩风化成的土壤对钾肥的效果反应明显。土壤中含白云母、长石较高的比含黑云母高的钾肥效果显著。根据我们对全省主要土壤的266个土样分析,由紫色砂页岩风化的几类土壤全钾及有效钾含量都较丰富。岷江灰色新冲
In recent years, with the increase of fertilizer production, the application of chemical nitrogen fertilizer, the increase in the number of phosphate fertilizer, potassium deficiency in some places appeared the phenomenon of the soil. In order to reasonably apply and exert the stimulation effect of potash fertilizer, the results of potash test in recent years are summed up for reference. First, the relationship between potash effect and soil types Soil as a result of different soil parent material, the effect of potassium on the response is different. For example, basal weathered soils with lower K than that of potash weathered by higher K-containing granites and gneisses responded significantly to the effect of potash. The soil contains muscovite, feldspar higher than the biotite containing high potassium fertilizer effect is remarkable. Based on our analysis of 266 soil samples from major soils in the province, total potassium and available potassium were weathered in several types of soils weathered by purple sand shale. Minjiang gray new red