A timely picking
After cotton bolls, it is generally picked every 5~7 days. If picking is too early, the cotton fiber is not yet fully matured, and the yield and quality are reduced. When the cotton is picked by the wind, it will reduce the fiber tension, the color will be polluted, and the cotton quality will also be reduced. Therefore, the cotton boll opening stage must be timely and precise. Slurry, improve cotton fiber quality and grade.
Second, beware of rain
When the mature cotton wool is exposed to rain, the pigments of the cotton husk, cotton leaf, and wrapper will contaminate the cotton fiber, causing the white cotton fiber to appear yellow, red, gray spots. If you encounter continuous rain, it will also cause mild deterioration. Therefore, we must keep abreast of the weather changes, pay attention to the weather forecast, and grab the cotton before the rain.
Third, do a good job of "four points"
When picking cotton, it is necessary to extract the good flowers, frozen petal cotton and landing cotton, separate them from the sun, and store them separately. They must not be mixed together for the purpose of classification and sale. When drying the cotton, avoid drying on the concrete floor and the drying table. Apply breathable bamboo curtains and bamboo baskets to separate the sun in different grades to ensure the cotton grade.
Fourth, spray ripening
In the late stage of cotton boll opening, mature ripening bells are ripened with pesticides to enable them to receive flowers in advance. This will not only reduce the damage of autumn rain, but also increase the quality of cotton by more than 20%, and it can also pull stalks 5 to 7 days in advance to facilitate seeding of the Xiaochun crops. Ripening method: Applying time, it is necessary to grasp that most of the cotton bolls in the late cotton field grow to more than 40 days, cotton fiber has basically matured, and the maximum daily temperature is above 20°C. Otherwise, the quality of the fiber will be reduced and the effect of spraying will be affected. Apply pesticides, use 40% ethephon 150 grams per mu of cotton fields, watered 60 kilograms, or use 20% grams of traceless water agent 125 ~ 150 ml, watered 25 ~ 30 kg, fully stirred and sprayed on the cotton plant Leaf and middle and upper bells can be sprayed once. Three days after spraying, the leaves began to fall off, and the dehydration of the bells started to spew. It should be noted that the rain should be selected from 10 am to 2 pm in the sunny days and the rain should be sprayed once after spraying. Breeding of fine varieties of cotton is not allowed to ripen with drugs. Cottonseeds that have been cooked with drugs cannot be used as seed.
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