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近几年随着高产耐肥品种的推广和复种指数的提高,氮磷化肥用量日益增多,农作物从土壤中吸收消耗的钾素也不断增加。而另一方面稿秆还田少,有机肥没有相应增长,土壤中钾素大量亏损得不到补充,供求矛盾愈来愈突出。因此,近年来不少地方施用钾肥的效应也愈来愈明显。但目前我省钾肥货源少,供应紧张,为了合理施用好钾肥,充分发挥钾肥的增产潜力,根据我们的试验结果,浅谈以下几点:
In recent years, with the popularization of high-yield varieties with high yield and the improvement of multiple-cropping index, the amount of nitrogen and phosphorus fertilizer is increasing day by day, and the amount of potassium consumed by crop plants is also increasing. On the other hand, there were fewer stalks in the field and no corresponding increase in organic manure. Large amounts of potassium in the soil were not supplemented and the contradiction between supply and demand became more and more obvious. Therefore, in many places in recent years the effect of potassium fertilizer is also more obvious. However, at present, there is little supply of potash fertilizer in our province and the supply is tight. In order to rationally apply potash fertilizer and give full play to the yield potential of potash fertilizer, according to our test results, the following points are briefly discussed: