The main goal of cotton's later management is to promote cotton maturity, early voicing, premature aging, and lack of greed.
Do a good job in pruning First, for the lush foliage of the cotton fields, the main stem can be removed from the old leaves, empty branches. The second is to eradicate axillary buds in a timely manner and adhere to the principle of axillary buds. The third is to hit the top of the group, and the group tips of the lower, middle and upper fruit shoots are generally destroyed in several stages. Fourthly, when the cotton fields or rainwater with particularly severe cover is high, it is necessary to carry out 2 or 3 pushes and ridges to promote the maturity of the bolls and reduce the decay of the bolls.
Foliar spray fertilizer to prevent premature aging Cotton should be managed late to prevent premature aging, should be sprayed through the leaves to meet the nutritional needs of cotton. Foliage spray fertilizer should be sprayed with 1.2% urea, 0.3% of potassium dihydrogen phosphate, 0.2% of zinc sulfate, and 0.1% to 0.2% of boric acid before the multi-element fertilizer mixture is sprayed several times; % of diammonium solution or 0.3% of potassium dihydrogen phosphate solution, spray 50 kg of fertilizer solution per acre, spraying once every 7 to 10 days, in order to achieve the purpose of preventing premature aging to promote premature.
Artificial chemical ripening
At the end of September and early October, choose sunny days, and use 40% of ethephon 150-200 ml per mu water spray 50 kg to promote early maturity. In case of rainy weather in the later period, the mature bolls with a bell period of more than 40 days can be taken off and soaked in a 0.5% to 1% ethephon solution. After the maximum daily temperature is below 20°C, the plastic film can be used to cover the temperature. , After the full effect of the efficacy of drug drying, can get normal boll bolls. In order to ensure efficacy, the ethephon solution should be used with it and it must not be mixed with alkaline pesticides.
Timely harvesting and production of high-yield bolls Cracking and opening of boll 7 days or so to pick the best, so that "four net, two do not close." "Four nets" means that the cotton bolls on the cotton plants are picked up, the cotton flaps in the cotton shells are removed, the ground cotton bolls are picked, and the impurities in the cotton wool are removed. "Two nos." ie not completely cracked Mature bolls are not harvested, and dew-free bolls on the battings are not harvested. In addition, the “three wires†pollution was strictly eliminated, and “three wires†were chemical fiber, hair, and hemp.
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