Cotton Planting Knowledge (Five) Field Management Of Cotton Boll Opening Period

　　 Boll opening stage In general, cotton fields should be prevented from premature decay, and high yield cotton fields should be prevented from late ripening and early maturing.

1. Only a few cotton bolls and bolls are still in the initial stage of watering and filling, most of the bolls are being enriched, and some young bolls are expanding at a high value. This is the key period to increase autumn peach, increase boll weight and improve quality. In case of drought, we must insist on watering. Watering time should not be too late, so as not to cause greedy late ripening. If the fertilizer is removed, 1% urea solution and 0.5% superphosphate solution can be sprayed.

2, reasonable pruning, to promote early maturity, and prevent rotten boll cotton fields from entering the boll opening period, still need to continue to do well in beating old leaves, cutting empty branches, beating heart and other pruning work. Especially for the late growing trend, the late greening cotton fields should be carried out. In order to improve the ventilation and light transmittance conditions, the organic bolus can be supplied centrally to the boll which has been formed, so as to make it mature early, and reduce the rotten bolls.

3, in time, if the old ripe peach is raining continuously in the initial stage, the premature boll will appear in the cotton field. In order to reduce the loss, the cotton bolls with more than 40 days' bells can be picked out in advance. After spraying or soaking with 0.5%-1% ethephon source, the normal boll opening bell can be obtained.

4, timely harvest ensure that the quality of cotton bolls should be collected in 5-7 days after cracking. The interval is too long. Under the sunlight, the fiber will become brittle and strong, and the quality will be affected. To collect flowers, we must achieve "five points", "four net" and "two not to accept". "Five points", that is, the separation of different varieties, seed and general plant separation, frost before the harvest, good flowers and the flower of the flower. Normal maturity and peeled green peach harvest. "Four net" is about to pick up the flowers on the cotton plant. The flesh inside the bell shell is picked up and picked up on the ground. "Two does not accept" that is not fully mature flowers do not rush to accept. The dew on cotton wadding can not be collected for the time being, and every time the flower can strictly fulfill the above requirements, it will ensure high yield and good harvest.

Cotton grades can be improved, and the "three wire" mixing should be strictly prevented in the above process.

Cotton vomiting Flocculation management Grasp "four skillful" (skillfully grasping fat water, smart pruning, skillfully picking rotten bells, skillfully ripening).

1, skillfully grasp fertilizer and water to promote nutrient movement. First, root topdressing. For the early chlorosis of leaves, the cotton fields with early age loss and early aging were sprayed with 1% ~ 2% urea solution for 50~60 kg per mu to extend the functional period of leaves. For cotton fields with overgrowth and greening and late maturing, 0.2% of potassium dihydrogen phosphate solution or 0.3% superphosphate leaching solution can be applied to the leaves to promote nutrient movement and improve the boll opening. The two is to prevent autumn drought.

2, smart pruning, pushing plants to promote maturity. Due to the limitation of temperature, the flowers of bud and White Dew are invalid after the beginning of autumn. The young part of new cotton plants should be removed in time to save not only nutrients but also the four generation of Helicoverpa armigera. In the seriously closed cotton field, because of poor ventilation, 3~5 cotton leaves can be protected by a cotton boll. It is also possible to push the plant to the ridge, and the two rows of adjacent cotton plants will be eight shaped together, and will be pushed to the sides 5~7 days later.

3, pick up the rotten bell to improve the quality. After the cotton picked peach was dipped in 1% of ethephon solution and then dried in air, it could get better cotton.

4, skillfully ripening early boll opening. Spraying at suitable time ethephon Cotton can be released 10 days earlier, and the rate of flower before frost increases by 20% to 30%. During spraying, cotton bolls on top of the cotton plant should be longer than 40 days, and 20 days from the dry frost period. The spraying amount is generally 40% grams per litre and 150 grams, and 50~100 times of water is evenly sprayed. If the spray is early, the temperature is high, the cotton plant is weak, and it can be sprayed about 100 grams per mu. After spraying for 6 hours, it is necessary to re spray when it rains.