Affected by the low-temperature and rainy weather in April, the cotton planting in the southern cotton area is generally delayed this year, and the development of cotton seedlings is slow. In addition, due to improper management, seedlings and seedling diseases are severe. According to the growth characteristics of Guoxin Cotton and this year's climate trend, we must now base ourselves on the disaster-preserving harvest, and do the following aspects in cultivation and management.
Shizuka pay attention to increase the application of phosphorus and potassium fertilizer, generally per acre Shinongjiajia 1000-2000 kg, superphosphate 50-60 kg, potassium chloride 10-15 kg, ammonium bicarbonate 20-30 kg. The southern cotton area is usually deficient in boron, and the application of borax 0.5-1 kg and zinc sulfate 1-1.5 kg per mu can be increased.
Early-onset seedlings need to be transplanted early, in early spring in early May as well, wheat in the middle of May cotton, cottonseed Rape and wheat stubble cotton robberies transplanting, not later than May 20th. Before the transplanting, we will send a marrying manure once. When transplanting, 2.5-3.5 kg of compound fertilizer per acre will be planted in the planting hole. You can promote seedling transplanting (1 leaf and 1 heart) in late planting. After planting, timely cultivating and weeding, dig up the drainage ditch. . General cotton field after the seedlings 5-7.5 kg per acre applied to urea, base fertilizer in the phosphorus and potassium fertilizer deficiency can be mixed with nitrogen fertilizer topdressing, high enough base fertilizer can not be applied in high-fertilizer cotton fields.
The density of control plants in China is high. It should be sparsely planted. Usually about 1,300 plants per mu, about 1100 plants per mu in high-yield cotton fields, and less than 1,500 plants per mu in poor soils, the later transplanted plots can be properly planted. .
Reasonably top-dressing bud fertilizer is usually applied after cotton budding, and high-yielding cotton fields can be postponed to Shenglei period. Application of urea 5-10 kilograms per mu, superphosphate 10-15 kilograms, potassium chloride 5-10 kilograms, the best open ditch and organic fertilizer mixture. The yield of Guoxin cotton is mainly composed of Futao and early autumn peach. The flower and bell fertilizer should be applied early. Generally, the early flowering period is appropriate, and the high yield field can be postponed until the lower part is sitting on 1-2 large peaches. Hualing fertilizer is dominated by urea, and the application rate depends on the soil fertility and yield level. Generally, the application rate is 15-25 kg/mu. When the amount of fertilizer in high-yield cotton fields is large, it can be divided into 2 times. The initial flowering period is once, and the flowering bell period is once. The application of top-coating fertilizer should not be excessive too late to prevent late-maturing greediness. The field with de-fertilization is appropriate in early August, and applies urea 5-7.5 kg per acre.
The pruning control uses conventional pruning methods. Chemical control adheres to the principle of “a small number of times†and controls the plant height at 120-130 cm.
Pest control. Strengthen pest control beyond seedling disease and lepidoptera.
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