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[目的]验证18.6%拌·福·乙种衣剂提高棉花耐低温胁迫能力,探讨各组分在其耐胁迫方面发挥的作用。[方法]选用自行研制的含有杀菌剂、调节剂、微肥、表面活性剂、防冻剂等组分的复合型种衣剂和市售同类产品,模拟新疆棉花“倒春寒”低温胁迫条件,在播种后第1、3、5、10天分别进行5、10、15、20℃共4个低温处理,测定种衣剂对棉种发芽、出苗、幼苗生长、冷害后缓苗的影响。[结果]不同低温处理下,种衣剂包衣处理较未包衣棉种发芽率、出苗率分别提高12.4%~14.9%、10.2%~11.8%,幼苗株高、根长、茎粗、鲜质量分别增加1.2~5.6 cm、1.2~3.8 cm、0.27~0.60 mm、0.04~0.32 g,种衣剂处理缓苗较未包衣快。供试3种种衣剂中18.6%拌·福·乙效果最佳,各组分中杀菌剂作用最显著,其次是调节剂,剔除杀菌剂、调节剂组分后,其出苗率仅比未包衣高0.7%左右。[结论]供试3种种衣剂均能提高棉种发芽和出苗率,促进幼苗茎杆增粗、根系伸长及生物量积累,抵御一定温度、强度低温胁迫,缓解棉花苗期低温危害,18.6%拌·福·乙种衣剂效果最佳。
[Objective] The research aimed to verify the ability of 18.6% b · F · B seed coating agent to improve the tolerance of cotton to low temperature stress and to explore the role of each component in its tolerance to stress. [Method] The composite seed coating agent containing fungicide, regulator, micronutrient, surfactant, antifreeze and other similar products were selected to simulate the condition of low temperature stress in Xinjiang cotton After sowing 1, 3, 5, 10 days were 5, 10,15,20 ℃, a total of four low temperature treatment to determine the effect of seed coating cotton seed germination, emergence, seedling growth, Huanmiao hulimiao affect. [Result] Under different low temperature treatments, the germination rate and the emergence rate of seed coating were increased by 12.4% -14.9% and 10.2% -11.8%, respectively. The seedling height, root length, stem diameter, freshness The mass increased 1.2 ~ 5.6 cm, 1.2 ~ 3.8 cm, 0.27 ~ 0.60 mm, 0.04 ~ 0.32 g, respectively. 18.6% of the three seed coating agents tested were the best, with the most effective fungicide in each component, followed by the regulator, excluding germicide and regulator components, the germination rate was only less than Clothing height of about 0.7%. [Conclusion] All the three kinds of seed coating agents could improve germination and emergence rate of cotton seedlings, promote seedling stem thickening, root elongation and biomass accumulation, resist certain temperature and intensity of low temperature stress and relieve low temperature damage of cotton seedling, 18.6 % Mixing b-seed coating best effect.