Key points of field management measures in flower and bell cotton
2021-05-26 14:03:27
The main direction of the field management during the flowering and bolling period is to promote promotion, promote control and integration, compete for the establishment of three peaches, increase the boll weight, precocity and premature aging, and prevent rotten bells.
1. The period of reapplying peach and peach fertilizers is a crucial period for determining the yield and quality of cotton. It is a time when both vegetative growth and reproductive growth are prosperous. It is the time when the maximum amount of fertilizer and water is needed. Therefore, it is necessary to re-apply the floral fertilizer and Filling peach. General requirements of a single plant with a 5-point coin size Qingling Shi Shihua fertilizer, Mushi 45% compound fertilizer 35 kg, or urea 15-20 kg plus 10 kg of potash. 15-20 days after the application of peach fertilizer, Mushi urea 10 kg, potassium chloride 7.5 kg, after the rain append.
Second, pruning and topping water and fertilizer adequate, axillary bud clusters of cotton plants should be timely wipe buds in order to reduce nutrient consumption and improve ventilation and light conditions, more bells, less fall off. For the cotton with extremely thin density and ridges and ridges, each plant can leave 1-2 leaf branches properly, which can not only save labor but also increase yield. Before and after the beginning of the fall, request the branches to be unequal (20-22 fruiting branches per plant), when they are not waiting for the branch (last August 10th), lightly beat the top, hit the top, and remove the newly born leaves. can.
Third, soil protection against lodging last year after the beginning of a few consecutive heavy rain, resulting in cotton lodging several times, severely reduced production. We must learn profound lessons from the beginning of Shi Leifei, combine digging four ditch, and do a good job of earth-cultivation. After 2-3 times of earth-cultivation, the height of cultivated soil reaches the height of the first fruit branch.
Fourth, comprehensive prevention and control of pests
In July, August and September, the occurrence of cotton pests and diseases was mainly caused by cotton bollworm, red bollworm, red spider, and yellow wilt disease. For the control of cotton bollworm, red spider. One must do a good job attracting moths, the use of sex attractants, lights, branches to the moth can be; the second to be combined with pruning to remove the eggs; Third, timely control of spraying, when the number of eggs per hundred up to 30 or more larvae For more than five heads, it is necessary to spray Wanling and other high-efficiency, low-toxic and low-residue chemical pesticides; For Starscream to find a lap, find a little hit and control its spread in time.
Fifth, continue to do a good job of chemical control, with 1-2 grams per acre with water spray agent for half a month, until the top.
6. To promote the return of straw to the field and before the closure of cotton fields, the use of 500-1000 pounds of wheat straw or other crop straws per acre of cotton fields can significantly reduce the evaporation of water in cotton fields, reduce the growth of weeds, and reduce the soil temperature. Soil structure, fertility, clean environment.
Seven, we must pay attention to timely drought, when even sunny 7-10 days, the top 3-4 leaves of cotton plants, wilting at noon until 3-4 o'clock in the afternoon still does not return to normal, to immediately drought. Use morning and evening furrow irrigation or water drought.
1. The period of reapplying peach and peach fertilizers is a crucial period for determining the yield and quality of cotton. It is a time when both vegetative growth and reproductive growth are prosperous. It is the time when the maximum amount of fertilizer and water is needed. Therefore, it is necessary to re-apply the floral fertilizer and Filling peach. General requirements of a single plant with a 5-point coin size Qingling Shi Shihua fertilizer, Mushi 45% compound fertilizer 35 kg, or urea 15-20 kg plus 10 kg of potash. 15-20 days after the application of peach fertilizer, Mushi urea 10 kg, potassium chloride 7.5 kg, after the rain append.
Second, pruning and topping water and fertilizer adequate, axillary bud clusters of cotton plants should be timely wipe buds in order to reduce nutrient consumption and improve ventilation and light conditions, more bells, less fall off. For the cotton with extremely thin density and ridges and ridges, each plant can leave 1-2 leaf branches properly, which can not only save labor but also increase yield. Before and after the beginning of the fall, request the branches to be unequal (20-22 fruiting branches per plant), when they are not waiting for the branch (last August 10th), lightly beat the top, hit the top, and remove the newly born leaves. can.
Third, soil protection against lodging last year after the beginning of a few consecutive heavy rain, resulting in cotton lodging several times, severely reduced production. We must learn profound lessons from the beginning of Shi Leifei, combine digging four ditch, and do a good job of earth-cultivation. After 2-3 times of earth-cultivation, the height of cultivated soil reaches the height of the first fruit branch.
Fourth, comprehensive prevention and control of pests
In July, August and September, the occurrence of cotton pests and diseases was mainly caused by cotton bollworm, red bollworm, red spider, and yellow wilt disease. For the control of cotton bollworm, red spider. One must do a good job attracting moths, the use of sex attractants, lights, branches to the moth can be; the second to be combined with pruning to remove the eggs; Third, timely control of spraying, when the number of eggs per hundred up to 30 or more larvae For more than five heads, it is necessary to spray Wanling and other high-efficiency, low-toxic and low-residue chemical pesticides; For Starscream to find a lap, find a little hit and control its spread in time.
Fifth, continue to do a good job of chemical control, with 1-2 grams per acre with water spray agent for half a month, until the top.
6. To promote the return of straw to the field and before the closure of cotton fields, the use of 500-1000 pounds of wheat straw or other crop straws per acre of cotton fields can significantly reduce the evaporation of water in cotton fields, reduce the growth of weeds, and reduce the soil temperature. Soil structure, fertility, clean environment.
Seven, we must pay attention to timely drought, when even sunny 7-10 days, the top 3-4 leaves of cotton plants, wilting at noon until 3-4 o'clock in the afternoon still does not return to normal, to immediately drought. Use morning and evening furrow irrigation or water drought.
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