First, a clear application of boron. First, after the application of boron fertilizer in cotton, it can effectively prevent the cotton flower from becoming unrealistic; secondly, it can improve the state of oxygen supply in the cotton rhizosphere, promote healthy growth, and enhance the absorption capacity of fertilizer and water; third, it can promote the smooth transportation of carbohydrates produced from the leaves to Other organs; four can improve genitals, promote flower bud differentiation, increase the rate of ringing; five can increase cotton yield, cotton fields with mild boron deficiency can increase production by more than 5%, serious cotton deficiency in cotton fields can increase production by about 10%. Second, identify the symptoms of boron deficiency. The first is that after cotton enters the bud stage, there is a ring of infiltration on the petiole, and the more the new leaf in the middle and upper part, the more obvious is the ring zone. Bud leaves are easy to open, like insect pests, exacerbated; second is a serious shortage of boron in the cotton field, the old cotton leaf petiole ring dark green deepened, the old leaf veins prominent, leaves crisp, new leaves become smaller, leaf surface Shrinkage, reverse curl; Third, fruit branches shortened, sometimes fruit branches and leaf branches in the main stem staggered Health; Fourth, fewer flowers, small flowers. Poor opening of flower mouth, pollen viability decreased, resulting in buds without flowers or flowers but not real; Fifth, young bell is small, less peach, bell light weight, bell-shaped sharp hook. Of course, the symptoms of boron deficiency in various cotton fields are somewhat different. Third, carefully choose boron fertilizer. The boron fertilizer currently sold on the market is mainly borax. According to the sampling and determination by the quality inspection authorities, most of them are not up to standard, and the pure boron content is only about 6%. Even the standard pure boron content is only 10.9%. The high content of Sonic boron, pure boron content of 20.5 ~ 21.6%. The boron content of boron is up to 15%. Therefore, the production of boron and Sonic boron is preferred. As for borax, boric acid, etc., it is necessary to use authentic standards. Fourth, pay attention to boron technology. First, to understand the status of boron deficiency in soils, the difference is severe, moderate or light boron deficiency or potential boron deficiency. Red soil and red soil are highly leaching and have a wide range of boron deficiency. Some soil boron is fixed and insoluble. Some soils have high organic matter content and boron is adsorbed, presenting potential boron deficiency. Some soils use too much lime to reduce the boron content. These different categories should be applied to boron; Second, to the cotton fields that are seriously deficient in boron, in addition to the application of boron in the base fertilizer, they must also be topdressed with boron, moderate or light boron-deficient cotton fields, and only need to apply boron fertilizer; To determine the amount of boron applied. Generally, the base fertilizer has about 250 grams of boron per acre, and the amount of severely deficient boron is doubled. B fertilizer is not applied in the base fertilizer. Each mu should be combined with the application of bud fertilizer or flower bell fertilizer to maintain 200 to 250 grams of boron. Fertilizer is applied in the bud stage, flowering stage, and boll season with 0.1~0.2% of Sorborone each time. Holding boron can be mixed with compound fertilizer, etc. Sonic boron can be applied alone or in combination with pesticides and urea. Customized Wound Drainage Reservoir,Wound Drainage Closed System,Wound Suction Drainage System,Wound Drainage Reservoir Kit K-MED Co., Ltd. , https://www.kmedasia.com