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棉花具有二次生长习性,受灾后自我调节和补偿能力较强,只要温度、营养等基本条件合适,灾后棉花仍能再发并开花吐絮,获得一定产量。因此,灾后棉田不要轻易毁种或放任不管,而应根据灾害时期和受灾程度,积极采取急救措施,尽量减少损失。一、旱灾后的管理棉花是较耐旱作物,一般栽培棉苗期当土壤耕层20厘米内含水量在10%以下、持续10天左右时,棉苗萎蔫但不至死亡,立即浇水仍可复苏。苗期干旱中耕保墒是有效的抗旱措施。蕾期干旱时,可以去除下部2～3个果枝或去其蕾;遇雨后重施蕾花肥,可促进棉花多座中部内围铃,减少旱灾损失。
Cotton has a second growth habit, self-regulation and compensation ability after the disaster is strong, as long as the temperature, nutrition and other basic conditions are appropriate, post-disaster cotton can still be re-flowering and flowering bolus to obtain a certain yield. Therefore, after the disaster cotton fields should not be easily destroyed or left indifferent, but should be based on the disaster period and degree of disaster, take active emergency measures to minimize losses. First, the drought after the management of cotton is more drought-tolerant crops, the general cultivation of cotton seedling when soil moisture content within 20 cm below 10% for 10 days, the cotton seedlings wilted but not to death, and immediately watering Still recover. Seedling drought Cultivation of soil moisture is an effective drought-resistant measures. Bud stage of drought, you can remove the lower part of 2 to 3 fruiting branches or go to its bud; re-apply after the rain buds and fertilizers, cotton can promote more than the central part of the central bell, reduce drought losses.