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磷酸二氢钾(KH_2PO_4)是一种高效的磷钾复合肥料,在多种作物上应用都获得一定的增产效果和经济效益。为了进一步探索蚕豆根外喷施磷酸二氢钾的增产作用,于1979～1985年连续7年分别在彭桥和崇寿两地进行了小区对比试验和大面积示范试验。现将主要结果归纳如下。
Potassium dihydrogen phosphate (KH_2PO_4) is an efficient phosphorus and potassium compound fertilizer, which has been applied in a wide range of crops to achieve certain stimulation effects and economic benefits. In order to further explore the effect of spraying potassium dihydrogen phosphate on broadleaf roots, we conducted plot comparison experiments and large-area demonstration experiments in Pengqiao and Chongshou for seven consecutive years from 1979 to 1985. Now the main results are summarized as follows.