Occurrence Regularity of Continuous Rain Weather in Winter Wheat Harvest Period and Its Influence on the Yield and Quality of Winter Wheat in Zhumadian
In order to enhance the scientific and technological support of agrometeorological disaster monitoring,forecasting and early warning,formulate the emergency mechanism of extreme weather scien-tifically and accurately,and better ensure food security,we conducted in-depth and detailed research on the regularity of continuous rain during the mature and harvest period of winter wheat and its impact on the yield and quality of winter wheat.The Zhumadian Station(in the south),Xiping Station(in the north)and Zhengyang Station(in the southeast)of Zhumadian City were selected as representative sta-tions of the whole city.Based on the observation data of winter wheat since 1981,the ripening-harvesting period of winter wheat in Zhumadian has been determined roughly from May 20 to June 10.Based on the meteorological observation data since 1981,the occurrence regularity of continuous rainy weather during the winter wheat ripening-harvesting period is analyzed statistically.The results show that in the 64 years from 1960 to 2023,the probability of continuous rainy weather during the ripening-harvesting period of winter wheat in Zhumadian City is very high,mainly concentrated in May 26-31 and June 6-10.From May 26 to 31,winter wheat in most areas of Zhumadian City is in the maturation stage,and continuous rain at this time has a much greater impact on the harvesting and drying of winter wheat.Within a week or so before the maturation date of winter wheat,it is very likely for continuous rain to coincide with the ripening date of wheat.Moreover,continuous rain before wheat's ripening occurs more than after its rip-ening,which impacts the yield and quality of winter wheat most seriously,and is also the biggest hidden danger affecting the yield and quality of winter wheat in Zhumadian City.Since 2011,the probability of continuous rain during the ripening-harvesting period of winter wheat has been in a decreasing trend.However,the probability of extreme weather and severe continuous rainfall is on the rise.The long dura-tion of continuous rain and the more accumulated rainfall are more harmful to the yield and quality of win-ter wheat.Therefore,it is suggested that early-maturing wheat varieties with spring or weak spring prop-erty should be planted in the southern part of Zhumadian,and semi-winter or winter wheat varieties with late maturity should be planted in the northern part.The wheat in the southern region should ripen around May 20 as far as possible,and the wheat in northern region should mature in June 1-3 so as to avoid the concentrated period of continuous rain from May 26 to 31.
winter wheatmature and harvest periodcontinuous rain weatheroccurrence regular-ityinfluence
万方数据
维普
