鲁西南连阴雨发生规律及对秋收秋种的影响
发布时间：2018-08-07 13:03
【摘要】：利用鲁西南1981~2014年连阴雨资料,分析了春、夏、秋季节连阴雨年变化趋势,连阴雨对农作物生长、产量及秋收秋种的影响。结果表明:春季连阴雨有明显减小趋势,夏季连阴雨变化不明显,秋季连阴雨有明显增加趋势;春季发生连阴雨的概率为47%,2年一遇,夏、秋季连阴雨出现概率均为97%,几乎每年一遇;秋季连阴雨对棉花、夏玉米等秋作物危害最大,连阴雨使夏玉米灌浆不足,贪青晚熟,棉铃霉烂,脱落,铃重减轻,造成夏玉米、棉花产量降低、品质下降;月降水量与作物产量相关分析,4月降水量与冬小麦产量呈显著正相关,7、10月降水量与棉花产量呈显著负相关。连阴雨使成熟秋作物不能及时收获、晾晒而霉变,导致秋收秋播相应推迟,晚播冬小麦分蘖少,苗情较差,次年冬小麦产量较低;但播种前适宜的降水也使农田墒情较好,冬小麦苗情较好,壮苗越冬,次年产量增加。
[Abstract]:Based on the continuous overcast rain data from 1981 to 2014 in Southwest Shandong Province, the trends of continuous overcast rain in spring, summer and autumn seasons were analyzed. The effects of continuous rain on crop growth, yield and autumn harvest were analyzed. The results show that the continuous rain in spring decreases obviously, the continuous rain in summer is not obvious, and the continuous rain in autumn is obviously increasing, and the probability of continuous rain in spring is 47%, once in 2 years, and in summer. The probability of continuous rain in autumn is both 97%, almost once a year. Continuous rain in autumn is the most harmful to cotton, summer corn and other autumn crops. Continuous rain causes insufficient grain filling of summer corn, greening late maturing, cotton boll mildew, falling off, and reducing boll weight, resulting in summer corn. The monthly precipitation and crop yield were positively correlated with winter wheat yield in April and negatively correlated with cotton yield in October. The continuous rain caused the mature autumn crops not to be harvested in time and dried and mildewed, which resulted in the corresponding delay of autumn sowing. The late sowing winter wheat had fewer tillers, the seedling condition was poor, and the next winter wheat yield was lower, but the suitable precipitation before sowing also made the farmland moisture content better. Winter wheat seedling condition is good, strong seedling overwintering, next year yield increases.
【作者单位】： 山东省菏泽市气象局;山东省郓城县气象局;
【基金】：国家小麦产业技术体系小麦体系项目(CARS-03)
【分类号】：S42
本文编号：2170106
[Abstract]:Based on the continuous overcast rain data from 1981 to 2014 in Southwest Shandong Province, the trends of continuous overcast rain in spring, summer and autumn seasons were analyzed. The effects of continuous rain on crop growth, yield and autumn harvest were analyzed. The results show that the continuous rain in spring decreases obviously, the continuous rain in summer is not obvious, and the continuous rain in autumn is obviously increasing, and the probability of continuous rain in spring is 47%, once in 2 years, and in summer. The probability of continuous rain in autumn is both 97%, almost once a year. Continuous rain in autumn is the most harmful to cotton, summer corn and other autumn crops. Continuous rain causes insufficient grain filling of summer corn, greening late maturing, cotton boll mildew, falling off, and reducing boll weight, resulting in summer corn. The monthly precipitation and crop yield were positively correlated with winter wheat yield in April and negatively correlated with cotton yield in October. The continuous rain caused the mature autumn crops not to be harvested in time and dried and mildewed, which resulted in the corresponding delay of autumn sowing. The late sowing winter wheat had fewer tillers, the seedling condition was poor, and the next winter wheat yield was lower, but the suitable precipitation before sowing also made the farmland moisture content better. Winter wheat seedling condition is good, strong seedling overwintering, next year yield increases.
【作者单位】： 山东省菏泽市气象局;山东省郓城县气象局;
【基金】：国家小麦产业技术体系小麦体系项目(CARS-03)
【分类号】：S42
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