In August, it was the time from cotton bloom to boll opening. It is a crucial period for Baofu Peach and Zhengqiu Peach. The main task of cotton field management is to improve the ventilation and light conditions of the cotton fields, maintain the vitality of the root system, prevent the late-maturing of the greediness, and prevent premature aging.
1, top dressing top dressing fertilizer
The cotton field that grows normally and replants the flower and bell fertilizer is usually supplemented with a top dressing before and after the tenth day. For the cotton fields with more early belling, in order to meet the needs of a large number of bolls for nutrients and increase the boll weight, it is usually necessary to supplement the top dressing. At the same time, for the early liberation of bolls too much, relying on the late bell production of cotton fields, in order to fight Qiu Tao, usually need to apply a second cap top dressing, top dressing fertilizer is usually applied around August 5 and August 20 About 5 kg of urea per mu can be applied. Apply after the rain or in conjunction with the irrigation surface.
2, pay attention to late watering
August is the peak of cotton bells. At this time, the temperature is still very high, the light is strong, and the water consumption is large. After fall in the region along the Yangtze River, it is prone to autumn drought, which often cannot meet the demand of cotton for water. Therefore, attention should be paid to the development of drought.
3, pruning
The pruning of this period, in addition to the top of the heart, continued to remove the crazy branches, axillary buds, but also to fight a group tip. In the local cotton area, it is usually necessary to punch the middle and lower groups of cotton fields in mid-August. The upper fruit branch can reach the side of the heart more than five fruit sections.
4, pest control
In late August, the bollworm, Spodoptera litura, and spider mites are usually in their infancy. Can be used separately 48% Water 60 ml water 50 kg spray. 15% Daban Ling 20 ml watered 50 kg spray. In August, individual cotton plants were larger, so the amount of water used per mu must not be reduced. When asked to fight drugs, "two turns and one buckle, four sides penetrated through," choose the afternoon after 4 pm to fight drugs the best, focusing on the back spray.
5, picking rotten bell
In heavily enclosed cotton fields and in periods with heavy rain in the later period, a large number of rotten bells often occur, seriously affecting the yield and quality. In the cultivation measures, it is an effective method to prevent the rotten bells by choosing a small amount of cut off the empty empty fruit branches, appropriately widening the row spacing, and changing the water from the dry cotton fields to raising the soil. Large-scale production, promote the timely picking of rotten bells. Generally, cotton bolls of more than 45 days are basically mature. Therefore, in case of continuous rainy weather in late August, the bell shell has faded, yellowed, or has begun to have dark spots removed in time and dried in time for more than 40 days. Cotton.
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