How to increase the emergence rate and keeping rate of cotton in spring

The main reasons for the low emergence rate of cotton and the low seedling maintenance rate are poor quality of land preparation: mainly because the land is uneven and the lyrics are not uniform. In some places, the dry soil layer is too thick, which results in the failure of planting seedlings after sowing. Long-term membrane cotton planting: Causes too much residual film on the surface of the soil, which can cause some seeds to sow directly on the mulch in the soil during seeding, and they cannot sprout. Or some of the seeds are rooted on the residual film just after emergence and cause dead seedlings. Climatic reasons: Cotton seed germination requires a certain temperature and humidity, if the wind falls after a sowing or a long time of rain and humidity, it will inevitably affect the emergence. If the method of film-on-demand is used first, the rain within 1 week after sowing will cause soil compaction on the surface of the sowing hole and affect seedling emergence. Artificial seedlings are not timely: In the planting method after the first sowing, the seedlings will not be able to emerge normally after being transplanted. In the spring, the weather is fickle: After encountering strong winds, droughts, and low temperature and rain, the weather is irresistible, and it is easy to die. Pests and diseases: Plant diseases and insect pests at the seedling stage of cotton can also cause dead seedlings.

Measures to improve the rate of seedling emergence and maintenance of cotton increase the quality of soil preparation: spring sowing of cotton ensures that the plough depth is not less than 25 cm, tillage is uniform, and surface formation is smooth after cultivation. On the virtual reality, no clear dark rubbish or debris, long-term use of mulching film to pick up the net residue film, a good environment for the seed to grow, improve the emergence rate. Select high-quality seeds: In the selection of varieties, the selection should not only be good, but also high-quality varieties, only high-quality seeds, in order to ensure the germination rate and improve the emergence rate. To improve the quality of sowing: The general open spring sowing in the middle and late April sowing is the most suitable period, plastic film cotton can be advanced to early April, require appropriate sowing, sowing depth of about 3 cm. Pay close attention to weather changes: Prepare for disaster prevention and disaster reduction and strive to minimize the damage caused by natural disasters. Prevention of pests and diseases: The main diseases of cotton seedlings are root disease and leaf disease. Seedling root disease mainly includes blight, anthrax, and red rot. Seedling leaf diseases mainly include black spot, stem blight, and angular spot. The main pests in cotton seedlings include cotton aphid, thrips, ground tiger, red spider, and stink bug. The disease can be used 50% carbendazim WP 500 to 800 times, or 70% thiophanate 800 to 1000 times, or 65% dexamethasone 500 to 800 times spray, spray 1 time every other week, a total of 2 spray ~3 times. Aphids and spider mites can be treated with 50% anti-inflavored WP 1000 times or 10% imidacloprid 3000 times. Prevention and control of ground tigers can be trapped and sprayed with 50% phoxim 1500 times solution.

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