High quality cultivation techniques of Color Ecological Cotton

The introduction of green, brown and other natural ecological cotton by Cao County Institute of Special Economic Animals and Plants in Shandong Province has achieved high economic benefits. It has been rapidly promoted locally. In order to obtain high yield and high quality of colored cotton, the following field management should be done well in the later stage.

1. Pouring autumn water well, spraying chemicals to keep bolls watered well, spraying chemicals to keep bolls, preventing premature senescence of cotton, reducing boll shedding, increasing boll weight, improving seed maturity and fiber quality, have significant effects. The concrete method is: adopt small ditch irrigation root water, at the same time with cotton boll-keeping element whole plant spraying.

2. Fine pruning can improve the ventilation and light transmission conditions of cotton field, reduce unnecessary consumption of cotton plant nutrients, facilitate more bolls, big bolls, more bolls and smooth bolls, improve cotton yield and increase economic benefits of cotton planting. Specific practices: timely remove the upper part of the cotton plant, the middle and the top of the fruit branch invalid bud; weak branches should be hit at any time; the lower part of the cotton plant loss of function of the old leaves and all empty branches, redundant buds are all knocked out to prevent rotten bolls (do not beat the leaves on the fruit branch). And to do a good job of pushing the plant together, the method: step on the base of the cotton plant to one side with your foot, so that the two rows of cotton plants are put together, and the ventilation channel between the rows is empty. After an interval of 5 to 7 days, the two rows of cotton plants close together are pushed open to restore the original state, so as to promote the maturity of cotton bolls and reduce rotten bolls.

3. Spraying fertilizer and medicine to prevent premature senescence. For cotton fields without fertilizer and premature senescence, timely apply 1%~2% urea solution and vitality solution for mixed spraying; for cotton fields with excessive growth, spray 2%~3% calcium superphosphate leaching solution or 0.3% potassium dihydrogen phosphate solution. Spraying starts from late August, spraying once every 7 ~10 days, spraying 2 ~3 times continuously.

4. Hardly control pests and diseases to ensure a bumper harvest. In view of the characteristics of insect conditions, focus on the treatment of three generations of cotton bollworm and bell disease. The old larvae were killed artificially, and the young larvae were cleaned up with drugs, so as to reduce the base number of the fourth generation cotton bollworm as much as possible. It can be sprayed with "Kaiwei 168" or "Kaiwei 198" or 40% phoxim EC 600ml/hm2, plus 20% triadimefon EC 600ml, mixed with 750kg water, to control other pests and late boll disease, and ensure high yield and harvest of cotton.

5. To accelerate the ripening and reduce the flowers after frost, the chemical "ethephon" is used to spray the cotton peaches with about 40 days of growth and the cotton fields with excessive growth and greediness and late ripening, so as to promote the early ripening and early opening of cotton bolls, reduce the flowers after frost and improve the economic benefits. 40%"ethephon" water solution 2.25kg/hm2 ~3.01kg/hm2 mixed with 600kg ~ 750kg water was sprayed on the whole field.