First, re-apply flower bell fertilizer, make up the topping fertilizer, and do a good job of foliar spraying in the later stage. Re-apply two flower bell fertilizers, the first time in the initial flowering period (July 5 to 10), apply 15 kg of ternary compound fertilizer with a potassium content of more than 15% per mu, 20 kg of urea, and one cotton plant. The side is 35 cm deep at the side of the ditch; the second time around July 20, 45% of the ternary compound fertilizer per acre is 15 kg, 25 kg of urea, on the other side of the first application of the bell fertilizer 35 cm from the cotton plant Ditching deep. At the end of July, the top fertilizer was applied, and 12.5 kg of urea per mu was applied. On the side of the first application of the bell fertilizer, the ditch was applied 40 cm away from the cotton plant. After entering August, due to the weakening of root system absorption of cotton plants, foliar fertilization should be adopted to supplement the plants with nutrients. It can be sprayed with 1% urea and 0.2% potassium dihydrogen phosphate mixture, or 1% of three. The leaf compound spray of the compound fertilizer solution is sprayed once every 7 days and sprayed 3-5 times continuously.
Second, timely irrigation and drainage. When the flowering bell is in drought, it should be poured with high-yield water. In the case of continuous dry weather, watering should be done every 7 days or so, in order to meet the large demand for moisture in the standard cotton. In case of flooding, the water in the cotton field should be quickly removed to maintain the proper water content of the soil. In the initial flocculation period, it is necessary to insist on watering, but the water volume should not be too large, so as to avoid the plants being greedy and late, it is generally only necessary to water the semi-ditch water.
Third, moderate pruning. As long as the water and fertilizer conditions are sufficient, the vegetative shoots, alfalfa and alfalfa buds of the standard cotton may form a bell, and are an important component of the yield, and generally do not require pruning. In the super high-yield plots, in order to shape the ideal plant type and population structure, the weakest vegetative shoots at the bottom of the plant can be removed after the buds, and 2-3 strong vegetative shoots are retained per plant, and each vegetative shoot grows 3 - 5 secondary fruit branches (around around July 15), hit the top of the vegetative shoots. When the main stem grows 18-20 fruit branches (about around July 25), the main stem is hit.
Fourth, light control and diligent adjustment. At the initial flowering stage, 1.5-2 grams of squamous amine is used to spray 15 kilograms of water on the leaf surface to prevent the plant from growing too fast; 10 days after the main stem is topped, 2-3 grams of acetaminophen per acre is sprayed with 20 kilograms of water. To prevent the occurrence of invalid flower buds and axillary buds.
Fifth, disease prevention and treatment of insects. When there is a sporadic disease plant in the field, it should be immediately removed and taken out of the field for deep burial, and the diseased hole should be sprayed with liquid medicine. The cotton plants around the disease center should immediately spray fungicides and foliar fertilizers to control the spread of the disease and improve the disease resistance of the cotton plants. For blind elephants, red spiders and volts, the pesticides should be selected to control them in a timely and effective manner. For the third and fourth generations of cotton bollworms, the resistance to the late standard cotton is reduced. When there are more than 6 larvae in the 100th larvae, Should be prevented 1-2 times.
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