I. Climate reasons This summer, rainfall in northern China is much more than normal, and continuous rainfall is accompanied by continuous cloudy days, resulting in a significant drop in temperature. After a sunny day, it encounters high temperatures. The high temperature causes a disorder in the physiological metabolism of cowpeas. At this time, it is the autumn flowering period of kidney beans. It is easy to cause the cowpea to grow slowly, fall and fall, beans are short and deformed. The optimum growth temperature of cowpea is between 20°C and 25°C. The temperature is too low. The flower buds of cowpea can not be normally differentiated, so that the beans appear short and so on. Second, improper planting management If the planting density and fertilization are improper, it will cause short and deformed kidney beans. Cowpea planting density should not be too dense, plant spacing 35 cm, row spacing of 50 cm is appropriate, generally about 2 kg per mu. Apply organic fertilizer at the bottom and pay attention to the reasonable mix of NPK fertilizer. Fertilizer can not be applied too much nitrogen fertilizer, can apply some more phosphate fertilizer, not only to the cowpea plants provide phosphorus, but also promote the formation of rhizobia, increase the yield of beans. Should pay attention to the harvest time, generally start picking about 70 days after sowing. Third, improper medication During the cowpea planting process, reasonable use should be made. In particular, plant growth regulators such as paclobutrazol, chlorpyrifos, and chlormequat should be used rationally, strictly following the instructions for use and the concentration of the liquid at the time, if the concentration is too high. It is easy to cause slow growth of kidney beans, short beans, deformities, and dark colors. Others Disposable silicone laryngeal mask airway Others Disposable Silicone Laryngeal Mask Airway,Medical Laryngeal Mask Airway,Silicone Laryngeal Mask Airway,Disposable Laryngeal Mask Airway Hangzhou Trifanz Medical Device Co., Ltd , https://www.cfzmed.com