Cotton Bolling Period Management Technology

Cotton boll opening period generally from late August to early November, which lasted 70-80 days. The main objectives of the cultivation and management during the boll opening period are: to promote the premature maturity of cotton, not premature aging, and not to be greedy. In order to strive for the maturity of all bolls, smooth boils, early maturing and premature aging, we must first do a good job of root preservation and leaf conservation. Second, we must improve the environment and create favorable conditions for boll development and boll opening. First, to promote the main measures for the early maturity of cotton 1. Strengthen pruning and push the plant and ridge opening period if the lush foliage of the cotton field, can be destroyed in the lower leaves of the main stem, empty fruit branches cut, in order to enhance the ventilation of the cotton fields, reduce humidity, At the same time, it can also reduce nutrient uselessness and promote normal boll opening. For cotton fields with particularly severe shading, the adjacent two rows of cotton plants will be pushed to the left and right sides by hand, showing an “eight” shape to increase the ventilation and light transmission between the rows, promote the maturity of bolls, and reduce the loss of rotten bells. 2, foliar spray. Phosphorus spraying time is generally after flowering, with 1%-2% of superphosphate soaking liquid, spraying once every 10 days or so. Phosphorus spraying leaves can promote the nitrogen-containing compounds in the leaves to accelerate the delivery of cotton bolls, accelerate the ripening of cotton bolls, and crack and open the bolls earlier. 3, the application of ripening agent ethephon ethephon can not generally spray prematurely, in our area generally in early October, 40% of ethylene dilute 100-170 ml per mu, 50 kg of water, the whole plant of cotton Spraying can significantly promote precocity and reduce rotten bells. In order to ensure the drug effect when used with the mix, at the same time, can not be mixed with alkaline pesticide spray. Second, prevent premature aging, the main measures of greed prevention against premature aging, greed for youth work, in the birth of cotton before and during the middle term to do a good job. If the cotton decay or greediness is discovered only when bolling starts, some corresponding remedial measures can only be taken. 1, timely spray nitrogen fertilizer. After the urea is sprayed on the leaf blade, it is quickly absorbed, which can increase the nitrogen level of the leaf itself, increase the photosynthesis ability, prolong the functional period of the leaf, and synthesize organic nutrients for the development of bolls to enrich the boll weight. 2. Flood control and drought prevention Pay attention to regulate soil moisture and improve soil ventilation to maintain the vitality of the root system, and strive to raise roots to prevent premature aging. 3, to prevent greed green cotton late greediness to timely eradicate axillary buds, knock down the overlapping leaves, timely spraying of phosphorus and ethephon, so that the cotton leaf nutrient accelerated delivery to the boll, increase boll weight. Third, fine harvesting, flowering floes when the majority of cotton plants already have 1-2 bolling bells, that is, should start harvesting, after every 7-10 days picking once. When picking cotton, the majority of cotton farmers should pay attention to the collection, splitting of drying, collection, sub-rolling, and sub-sale, which has a great effect on improving cotton production and improving fiber quality. China Agricultural Network Editor

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