一、灾害性天气对棉花培育壮茁的影响在塑料薄膜覆盖栽培环境条件下,制约棉花早大壮苗的主要气象因子是3月中旬至4月下旬这一时段的光照时数,主要栽培因素是苗床管理技术。分析盐城市大面积推广育苗移栽后的1981～1990年10年来3月中旬至4月底的气象资料,平均气温稳定在10℃以上播种期的始日是3月30日,80%保证率 First, the impact of disastrous weather on the cultivation of Zhuang Zhuo Zhuo In the plastic film covered cultivation environment, the main meteorological factors restricting the strong early cotton seedling is mid-March to late April this period of light hours, the main cultivation factors Is a seedbed management technology. The meteorological data of Yancheng City during the large-scale popularization of seedling transplanting from 1981 to 1990 in the middle of March to the end of April in the past ten years were analyzed. The average temperature was stable above 10 ℃. The date of planting was March 30, and the guarantee rate of 80%