1. Pre-broadcast management
Do a good job in cotton field irrigation, fertilization, land preparation, picking up residual film, weeding, and cultivating in time. To irrigate cotton fields before winter in southern Xinjiang, spring irrigation should be carried out in time. Apply enough base fertilizer, including organic fertilizer 1-1.5 m3/mu, nitrogen fertilizer (urea) 15-20 kg/mu, phosphate fertilizer 20-25 kg/mu, and potassium sulfate 3-5 kg/mu.
From the end of March to the beginning of April, when the soil moisture content reaches 70%, the soil will be prepared in a timely and appropriate manner, and the plowing, plowing, cutting, and leveling work should be done to meet the standards of "evenness, leveling, cleanness, moisture, looseness, and brokenness".
Spray trifluralin Herbicide 2-3 days before sowing, with a dosage of about 100 ml per mu, and add 20-30 kg of water.
2. Variety selection
Choose high-quality, early-maturing, stable-yield, disease-resistant, mature and concentrated cotton varieties suitable for machine harvesting. The fiber lint length is> 30 mm, the fiber specific strength is> 30 cN/tex, and the micronaire value is 3.7-4.5. The varieties with a growth period of about 120 days are selected in northern Xinjiang, and varieties with a growth period of 130-135 days are selected in southern Xinjiang.
Three, planting mode
According to the characteristics of the variety, determine the planting mode suitable for machine harvesting. For varieties with loose plant type and strong compensation ability, use 1 film with 6 rows or 1 film with 3 rows, with a density of 13,000-15,000 plants per mu; for varieties with compact plant types and weak compensation capabilities, use 1 film with 6 rows and 17,000 plants per mu. .
Four, field management
It is expected that this year, cotton diseases, pests and weeds in Xinjiang will occur moderately on the whole and severely in some areas. In the early stage, we should strengthen the prevention of cotton wilt, root rot, damping-off, and cotton thrips, cotton aphids and other diseases and insect pests.
On the basis of seed dressing treatment with seed coating agents, foliar sprays such as mancozeb, polyoxin and other fungicides should be promptly sprayed to prevent seedling disease at the early stage of the disease; Horse and aphids.
According to the growth and development indicators of cotton, timely control, take measures such as spraying mepidium (mepiquat), foliar fertilizer, field tillage, etc., to ensure that the main stem of the cotton plant grows moderately, reaching 7 leaf ages in late May, and the cotton plant width is> Plant height, cotyledon node
5. Disaster prevention and mitigation
Pay close attention to changes in the weather, and do a good job in time to prevent severe weather such as frost, late spring cold, low temperature and cold damage, and strong winds.
In recent years, Xinjiang cotton has had a lot of precipitation during the period from sowing to emergence of cotton. It is necessary to strengthen the management of compaction and secondary salinization after rain, promptly cultivating and draining water, raising temperature to protect moisture, and promoting the growth of cotton seedlings. The suitable cultivating depth is 6-10 cm.
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