Cotton seedlings should do a good job in the management of seedbeds centered on the principle of “competition for seedlings, conservation of seedlings, and breeding of healthy seedlingsâ€.
Timely filling of seedlings due to low seed germination rate, no emergence after 1 week of sowing, or seedlings with seedlings below 30%, should be ploughed in time to reseeding; the emergence rate is more than 40%, the number of seedlings is less (less than 70%) The seedbed should be replanted. In case of lack of moisture, the lack of water in the bed with white soil and lack of soil moisture at the bottom of the bed should be used to remove membrane water before the 8 o'clock in the morning when the temperature difference between the inside and outside of the seedbed is small. If the amount of fertilizers such as urea and ammonium bicarbonate is too large or the herbicides are applied improperly, seedlings that are not seedlings or dead seedlings should be replanted.
Thermoregulation, pest control, adherence to ventilation without removing the film, Qimiao to the appropriate increase in the temperature of the bed during the 2 leaf period, the day to open the night cover, late exposing early cover, in order to speed up the leaf rate. After the second true leaf is flat, the ventilation is maintained overnight, and the position and size of the vents are adjusted according to the bed temperature to prevent the emergence of tall seedlings. Mutation in the seedling weather can easily lead to disease and death. Seedlings prevent and control insects such as blind locusts, aphids, and thrips, and can avoid the emergence of headless or multi-headed seedlings. In case of low temperature and even rainy weather, the vents should be closed in time to avoid cold damage and clear seedlings. Drainage and drainage of the drains around the seedbed should be improved, and the ground temperature should be raised to prevent germs from inflicting dead seedlings.
Cultivate strong seedlings to stand up to disasters, support a set of seedbed ditch, and reinforce the rope network. Timely ventilation and loose weeding, Dingmiao weeding. Sealed film after sowing, high temperature and humidity rush Qimiao. After the cotyledons of the cotton seedlings are flat, they can alternately pass small winds on both sides of the seedbed for 1 to 2 days in time to catch the noon tillage seedlings in the sunny day and dry their beds to reduce humidity. When the first true leaves of cotton seedlings are pumped, special biochemical preparations such as “promoting prime factors†are used for seedbeds to prevent the emergence of tall seedlings and promote the stable growth of cotton seedlings.
Moving the seedlings and transplanting the seedlings can shorten the seedling stage after transplanting, awaken the seedlings early, and increase the transplanting seedling rate. Generally, 10 to 15 days before transplanting, the seedlings will be transplanted. Attention should be paid to supplementing fertilizers, replenishing water, filling soil, and increasing temperature after transplanting.
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