1992年宁夏水稻冷害分析

ANALYSIS OF RICE OF NINGXIA IN 1992

本文以永宁气象站资料为依据,分析了宁夏1971～1992年气温变化对水稻单产的影响。回归分析证明:水稻亩产起落与5～9月份≥10℃的积温关系密切,其回归方程Y=-2304.7+0.9269∑T,r=0.5352达显著水准;同时统计了43年来(1950～1992)5～9月份平均积温为2999℃·日,历年与此值接近的年份为平年,高于此值100℃·日为丰年,低于此值100℃·日为歉年。据此,对1992年宁夏水稻冷害作了分析,并提出预防冷害的措施,以资参考。

this paper, based on the meteorologic data of Yongning Meterorological Station, analysed the influence of change of air temperature to the yield of rice per Mu. The result of regression analysis demonstrated that there was a close relation between the change of yield of rice per Mu and the accumulated temperature ≥10. C from May toSeptember, the regression epuation was A/Y=-2304. 7 + 0. 8269ΞT,r = 0. 5352 ,the rela-tionship reached a significant level. Meanwhile, the mean accumulated temperature inMay to September for 43 years (1950-1992) was 2999℃,When the temperature ofcalender year approached the value, it was a normal year, when the temperature was 100℃ more than the value,it was a rich year. When the temperature was 100℃ less than the value it was a lean year . From this ,the cold damage to rice in Ningxia Yellow River Irrigated Area in 1992 was analysed, and the way to deal with preventing cold damage.