Choose good breed. When you grow cotton, you first need to choose a good seed. The best selection of hybrid cotton varieties, its high yield and good quality. The first is to select the varieties that have been approved; the second is the varieties that have been planted locally; the third is that the provincial Department of Agriculture has introduced varieties of approvals; the fourth is the selection of high-resistance (resistance-resistant and insect-resistant) varieties; and the fifth is the use of northern varieties. It is recommended to plant hybrid cotton F1 generation varieties such as high-yield-type Xiangzamian No. 16 and early peach-type Yahuamian 7. Self-retained hybrid cotton seeds cannot be reused. Replanting will reduce yield and quality.
Nursery transplanting. Good cotton varieties must be transplanted through seedlings to produce high yields and good quality. Live cotton has strong growth potential, high plant height, strong nutrient growth, and low yield. It is advisable that the daily average temperature of the nursery is stable at more than 12°C, that is, from late March to early April, the cotton seedlings in the early morning are susceptible to freezing, and the growth period is too short to reduce the yield. When raising the seedlings, first prepare the north-south seedbed and the nutrient soil, and use a newspaper to prepare a nutrition bowl of 8 to 10 cm in diameter. Fill the bowl with nutrient soil and place it on the seedbed, and put 1 to 2 seeds per pod. Small arch greenhouse insulation seedlings. When growing more than 3 true leaves for about 40 days, they are transplanted. Nursery period should pay attention to pest control and spraying foliar fertilizer to cultivate strong seedlings. When transplanting, the spacing is 100 centimeters, the spacing between plants is 50 centimeters, and 1300 plants are planted per acre.
Fertilizer management. There are two periods of cotton fertilization, ie, post-transplantation seedling and bud fertilizer. Miao Fei applies 10 kg of urea per acre. Once for 15 days after planting, urea applied 3 kg of urea; one time before budding after branching, 7 kg of urea was applied. Fertilizer planted with 50 kg of fertilizer or 40% of compound fertilizer per acre, applied in a ditch, and covered with soil to prevent the fertilizer from evaporating. Cotton is afraid of water, water will appear rotten root rotten peach phenomenon. The main measure is to drain the ditch, each with a width of 30 cm.
Pick leaf topping. The branches and leaves of cotton are lush and affect fruit setting. When the first bud appears, the buds of the buds without buds below the first fruit branch should be removed. By the end of July and early August, the main branches of the plants and the leaves on the branches must be removed. Prevent further extension of consumption of nutrients. When topping, cut empty branches (less flowering branches) and remove the lower yellow leaves to increase the photosynthesis of cotton fields and promote the large and full bolls.
Cultivated coverage. When the plant has 3 to 4 fruit stalks, cultivating is carried out, with a depth of about 20 cm. The roots are deepened and the lateral roots are increased. The timely use of thatch, straw, and litter to cover cotton land after cultivator can prevent soil compaction and provide favorable ventilation and water conservation.
Prevent pests. The cotton seedling stage is mainly blight and ground tiger; bud stage is mainly anthrax, red spider, cotton aphid, cotton bollworm, cockroach and so on. The use of high-efficiency and low-toxicity pesticides in the prevention and control, and the use of frequency-vibration insecticidal lamps for insect pests can be achieved.
Harvest timely. Most of the cotton plants have 2 flowers that are full of bolls for the start of the picking period. Sunny days should be chosen before 9 o'clock in the morning. Grab sunny days later each week. Stop picking cotton that is not fully boiled, so as not to affect the quality and reduce the selling price. When a family grows more than 2 varieties, they should separate flowers, flowers, flowers and cotton, and do not mix and mix with the sun.
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