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为了探索过磷酸钙通过棉田绿肥——光叶紫花苕子后耕翻植棉,与过磷酸钙直接施于棉田作基肥,对增产棉花的经济效益,我们在苏北盐土棉区进行了试验研究。兹将研究结果报导于后,以供参考。 一 施用过磷酸钙对绿肥作物的增产效果 棉田绿肥光叶紫花苕子于秋季在棉花行间套种时,每亩用过磷酸钙10斤和20斤作基肥,集中施入播种沟内,植株健旺,单株干物重增加。苗期单株干物重施磷肥的,比不施磷肥的对照增重34.4—59.01%,生长盛期增重37.57—55.56%。于棉花
In order to explore the crosstalk of green manure through the cotton field - the light turnip transplanting cotton transplanting, and the direct application of superphosphate in the cotton field as a base fertilizer, to increase the economic benefits of cotton, we in the northern salt cotton area were studied . I hereby report the results for reference. A superphosphate application of green manure crop yield-enhancing effect of cotton green leaves of light purple prickly heat in the autumn intercropping intercropped cotton, per acre with superphosphate 10 pounds and 20 pounds as a base fertilizer, concentrated into the planting groove, the plant healthy , Dry weight per plant increased. In the seedling stage, the weight of dry matter per plant was increased by 34.4-59.01% compared with the control without phosphate fertilizer, and the growth weight was 37.57-55.56% during the growth period. In cotton