棉花的施钾效果,已有不少产棉单位和科技人员作过研究,在常年早衰的老棉区,合理施用钾肥已成为进一步提高产量的重要手段。根据近年调查,本省棉区由于缺钾而引起早衰的棉田约在10～30%左右,影响到这些棉田产量的进一步提高。缺钾棉田,在苗期就反映出棉叶缺钾症,以后逐渐扩大,到七月中下旬,由于土温上升,土壤有效钾释放量增加,缺钾症常可停止发展,有时还可恢复正常,但进入花铃期后, There are many cotton producing units and scientific and technical personnel who have studied the effect of potassium fertilization in cotton. In the old cotton area of ​​premature senescence, the rational application of potash fertilizer has become an important measure to further increase the yield. According to recent surveys, cotton fields in the province’s cotton fields that cause premature aging due to potassium deficiency are estimated at about 10 to 30%, affecting the further improvement in yields of these cotton fields. Potassium deficiency cotton field, at seedling stage reflects the cotton leaf potassium deficiency, and then gradually expanded to mid to late July, due to soil temperature increased soil available potassium release increased potassium deficiency can often stop the development and sometimes recovery Normal, but after entering the flower ring,