With the increase of multiple cropping index and yield, inappropriate fertilization and other reasons, the content of available potassium in soil has decreased in recent years. For cotton, the lack of potassium in the soil will not only reduce cotton production, but also reduce the quality of cotton fiber, causing economic losses to cotton farmers. The symptoms of potassium deficiency in cotton were mainly mottled cotton, and the plants were dwarf, weak and uneven. In the absence of potassium and nitrogen fertilizers, the symptoms were dry cobundation of leaves and early fall off, and some also caused leaf blight. Symptoms develop from bottom to top, from margin to center. The lack of potassium in the lower part of the fruit branch development is poor, the bell is small and small, the middle fruit branch is slightly carried out, the fruit section is still less, and the normal pagoda plant type contrast; early early ringing significantly reduced, delayed premature aging, a large reduction in output, Poor quality of cotton fiber. In order to avoid the symptoms of potassium deficiency, cotton field should pay attention to increase potassium fertilizer, so that combination of basal and top dressing. With organic fertilizer as the base fertilizer, in the soil with severe potassium deficiency, the proportion of potash fertilizer should be appropriately increased in the base fertilizer, and top dressing and foliar spray fertilizer should be applied in time. The phenomenon of potassium deficiency in cotton is relatively common, but it is generally not until late in the performance of the cotton, but it is too late to apply potash fertilizer at the time. Therefore, in the peak stage of cotton fertilizer (boll stage), not only topdressing nitrogen fertilizer, but also But also to topdressing potassium fertilizer (potassium chloride or potassium sulfate), while spraying foliar fertilizer potassium fertilizer. Phyllanthus Emblica L,Extract Of Fructus Cynanchum,Phyllanthus Emblica Extract,Rhizoma Glycyrrhizae Extract NANJING ZELANG MEDICAL TECHONOLOGY CO., LTD , https://www.hawfitness.com