How to increase the ratio of cotton to peach
The types of shedding of cotton buds are physiologically shedding, pests and diseases are shed, and mechanical damage is lost. From the aspect of physiological shedding, the first is excessive application of fertilizer and water, resulting in prosperous growth, excessive consumption of nutrients in the early stage, and insufficiency of supply in the later period; second, excessive density of cotton fields, serious overgrowth of foliage, low light, photosynthesis decline, and nutrient production. Reduction; Third, some cotton fields lack of boron, resulting in the flowers are not real; Fourth, high temperature and drought, fertilizer and water shortage or high temperature cotton pollen abortion; Fifth, frequent rain, poor pollination. In terms of pests and diseases, the control of cotton blind lice, cotton bollworm, and yellow wilt disease are ineffective, and it is easy to cause a large amount of shedding of bells. In terms of mechanical damage, it is mainly caused by improper operation of people in field management. In addition, the blind application of herbicides in the past two years has caused the phenomenon of shedding of bolls.
Therefore, in order to increase the rate of cotton production, we must adopt integrated measures to strengthen the management of fertilizer and water. The main attack is on Pho, and the fruits of Peach are numerous, and the three peaches are tied together to seize high-yield cotton.
First, apply fertilizer to science. At present, it is the critical period when cotton is used to produce flower and bell fertilizers and peach fertilizer. It is necessary to combine rainfall forecasted in the near future. First, cotton that is still ringing and bolling, should use high-level compound fertilizer 30-50 kg per mu. 30 kg of potash fertilizer; second, the single plant has 2 to 3 peaches, 20 to 30 pounds of urea per acre, potassium fertilizer, 20 kg of potash, and 3 when a single plant has 8 When 10 peaches are harvested, 30 mu of urea will be traced back to each mu. Fourth, the cotton field with severe boron deficiency will be sprayed with boron and other boron fertilizers for 2 to 3 times every 7 days.
Second, improve ventilation and light transmission conditions. In order to enhance the permeability of the cotton field, the light intensity is increased in two ways. First, the whole pruning is done, and the wood branches and axillary buds of the larger cotton fields are completely dispelled, and the cotton with a relatively light density may be left with 1 or 2 Wood branches, removal of the top, retaining two secondary fruit branches; Second, the use of delayed-type plant growth regulators dildoamine or booster spray, per acre due to seedlings system, with 1 ~ 2 grams of salicylamine or help The strength of 4 to 8 milliliters can better control the cotton plant type, prevent premature closure, ensure air and light transmission.
Third, prevent pests. The third-generation H. armigera and L. militaris all occur at different levels, and they must be prevented in time before the peak period. They can use 2% emamectin benzoate wettable liquid, 40% chlorpyrifos, respectively. Lesport creams are used for prevention. Increased potassium fertilization in wilt diseased cotton fields can increase defense and recovery capacity.
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