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随着棉花杂交种的日益普及,其制种面积也进一步扩大。但在杂交制种期间,常常会遇到高温干旱、雷阵雨、连续阴雨等异常天气,这就给正常的棉花人工去雄、制种带来诸多不便,甚至工作受阻,从而直接影响到棉花杂交制种的产量和质量。根据近年来的制种实践,对制种期间出现的异常天气采取了一些应对措施,收到了较好的应用效果。1 持续高温干旱天气1.1 不利影响持续高温干旱对棉花的影响较大,若气温高于35℃,则均会一定程度的影响散粉、受精。同时,在花铃期间棉花一生中需水最多,棉株对水反应极其敏感,如
With the increasing popularity of cotton hybrids, their seed production area has also been further expanded. However, during hybrid seed production, abnormal weather such as high temperature and drought, thunderstorms and continuous overcast and rainy days are often encountered. This gives normal cotton artificial removal and seed production and causes inconvenience and even work obstruction, which directly affects the hybridization of cotton Seed production and quality. According to the practice of seed production in recent years, some countermeasures have been taken on abnormal weather during seed production, and the better application effect has been received. 1 continued high temperature and drought weather 1.1 adverse effects of continuous high temperature and drought on cotton greater impact, if the temperature is higher than 35 ℃, will have a certain degree of loose powder, fertilization. At the same time, cotton needs the most water during its life, cotton plants are extremely sensitive to water reactions, such as