First, choose the appropriate variety of saline-alkali land due to high groundwater level, soil viscosity, low organic matter content, soil barren, should choose salt-resistant, resistant varieties such as: GK ~ 12. Second, pre-planting soil treatment Autumn cultivation of cotton land, after soil drying, soil disinfection, and increase the porosity of the soil, after the winter to carry out multiple pressure, so that the land is flat, the soil is uniform, and Apply to the base fertilizer, apply 2 square meters of soil miscellaneous fertilizer per 667 square meters, sow the spring of next year to carry out repeated pressure, so that the soil is preserved, and apply 10kg of diammonium phosphate per 667 square meters as seedling fertilizer. III. Seed treatment before sowing For the cotton seed to be sown, the cotton seed is treated with dilute sulfuric acid. The ratio of cottonseed to sulphuric acid is 5:1. The cottonseed and sulphuric acid are mixed and mixed, and the sulphuric acid and impurities on the seed are cleaned with water immediately after use. The seeds are smooth and then dressed with pesticides. That is, 40% of arsenic and 40% of carbofuran, which can prevent and control underground pests and aphids in the seedling stage. Fourth, the sowing date should be selected before and after April 5 each year, line spacing 45cm30cm, covering the depth of seed 3 to 5 times. After sowing, close the treatment with oxaloammonium, and then cover the film, shovel a shallow ditch at a position approximately 17cm away from the cotton sowing line, then spread the mulch to the ground, embed the membrane edge in the trench, and compact the edges after burying the soil. Membrane surface pressure semi-diameter every 1m, to prevent the wind to remove the film temperature loss, covered with a laminator, high efficiency and good effect. After 80% of the seeds are unearthed, the seedlings shall be placed in a timely manner. The holes shall not be too large. The diameter of the holes shall be 3 to 4cm. After the soil is broken, the edges of the film holes shall be compacted with fine soil so as to prevent air leakage and reduce the effect of warming and protecting the soil. Burn seedlings. Fifth, the management of the growth period 1. Simplified pruning, to simplify the middle tillage cotton appears 3 to 4 fruit branches, the vegetative branches and cotyledons below the first fruit branch removed. Should retain the main stem leaves (formerly earthworm stems in the end), to facilitate the growth of the main stem and the production of organic nutrition; early hit the top can improve the population lighting conditions, adjust the plant nutrient distribution direction, control the top growth advantage, so that nutrients to the fruit branch direction, Increase the bell and bell weight in the middle and lower parts to increase the amount of frost before flowers. The general principle is: when not waiting for the branch, branch to see growth; to Fengjing, axillary buds, old leaves, empty branches time in late July to early August, the general cultivator 3 times as well, 3 times the time for Dingmiao, During the initial budding period and the budding period, localities can adjust the cultivator time according to the rainfall and weed growth during the year. To ensure the quality of cultivator, prevent ploughing, cultivator depth 3 ~ 4cm. 2. When the first flower bud appears in the chemical control, spray 1 time every 15 days to reduce the amount of ammonium nitrite plus 2% urea or 1% diammonium phosphate dilute solution, the first time to reduce the first time 1g/667 square meters of amine, after each spray One dose increase 1g, so spray 3 to 5 times so that the cotton strain is controlled at 50 ~ 70cm, so that a large increase in Fusian peach, and the cotton strain is robust. VI. Pest Control The main insect pests in cotton include roundworm, red spider, and cotton bollworm. The disease is mainly cotton leaf spot leaf spot, which can be used to control 1500 times of anti-influx, 2000 times of quinone, and 3000 times of deltamethrin.
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