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棉籽在4－5℃条件下吸水，发生吸胀冷害的程度随吸水速度的加快而减轻，随吸水时间的延长而加重；在10-12℃、18－20℃的水中吸水分别超过16小时、12小时，会因吸水时间过长使部分棉籽的种子活力降低，而使正常发芽率降低。经温汤浸种和预冷处理的棉籽能耐72小时0－5℃的低温，且耐较长时间低温的能力强于干籽与晾干籽；干籽、晾干籽能耐24小时0－2℃的低温，且干籽耐短时间低温的能力强于湿籽。
Cottonseed at 4-5 ℃ under the conditions of absorption, the occurrence of the degree of absorption of chilling injury with the speed of water absorption and reduce, with the extension of the water-absorbing time and aggravate; at 10-12 ℃, 18-20 ℃ in the water absorption of more than 16 hours, 12 hours, due to excessive water absorption time so that part of the seed cotton seed activity decreased, leaving the normal rate of germination. Cotton seed soaked in warm water and pre-cooled could resist low temperature of 0-5 ℃ in 72 hours and had stronger resistance to low temperature for longer time than dried seeds and dry seeds. Dry seeds and dried seeds could tolerate low temperature of 0-2 ℃ for 24 hours , And dry seeds resistant to short-term low temperature ability is better than wet seeds.