论文部分内容阅读
火南风,是指小暑(7月7日)前后持续3天以上的日平均气温大于或等于30℃,相对湿度小于60％,中午伴有3级左右偏南风的天气。这种干热的西南风,能增强禾苗的蒸腾作用,使稻株体内水分供不应求,导致叶片和枝梗干枯早衰,叶尖常因水分不足导致灼伤枯死,影响营养物质的积累和运转。开花灌浆期遇火南风影响授精结实,空秕率增多,千粒重下降。据中国科学
Fire southerly means that the average daily temperature of 3 days or more before and after the small heat (July 7) is greater than or equal to 30 ° C and the relative humidity is less than 60%. There is noon-level southerly wind at noon. This dry and hot southwest wind can enhance the transpiration of seedlings and make the rice plants in short supply, resulting in the premature decay of leaves and branches. The leaves often cause burns and death due to insufficient water, affecting the accumulation and operation of nutrients. In the flowering and filling stage, the southerly wind affected the insemination and fruiting, the empty rate increased, and the grain weight decreased. According to Chinese science