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积温是作物种植界限的重要参考依据,分析其变化特征可为农业气候区划、合理种植农作物等提供科学依据.基于黑龙江省62个气象站点1961-2014年的逐日平均气温资料和地理信息数据,采用多种气候统计方法,建立多元线性回归模型,分析了近54年来黑龙江省≥10℃积温的时空变化特征.结果表明:1961年以来,黑龙江省≥10℃积温初日明显提前,终日显著推迟,持续日数增加,≥10℃积温显著上升,在1994年发生突变;≥10℃积温随着纬度的增加逐渐降低,随海拔的升高而减少,低于1 900℃积温区域所占面积有逐年减少的趋势,2 700℃以上积温区域所占面积呈显著增加趋势;随着黑龙江省积温的增加,积温带明显向北、向东移动,第一和第二积温带面积显著增加,第六积温带面积显著缩小.
Accumulated temperature is an important reference basis for crop planting boundaries, and analysis of its changing characteristics can provide scientific basis for agricultural climate zoning and reasonable planting of crops.According to the daily average temperature data and geographic information data of 62 weather stations in Heilongjiang Province from 1961 to 2014, A variety of climatic statistic methods was established to establish the multiple linear regression model and to analyze the spatio-temporal variations of accumulated temperature ≥10 ℃ in Heilongjiang Province during the past 54 years.The results showed that since 1961, the initial day ≥10 ℃ of Heilongjiang Province was obviously advanced and lasted significantly all day Increasing the number of days, ≥10 ℃ accumulated temperature increased significantly in 1994, mutation; ≥ 10 ℃ accumulated temperature decreased with increasing latitude, decreased with the elevation, the area below 1 900 ℃ accumulated area has decreased year by year The area of accumulated temperature above 2 700 ℃ showed a significant increase trend. With the increase of accumulated temperature in Heilongjiang Province, the accumulated temperature zone moved northward and eastward, the area of the first and second accumulated temperature increased significantly, and the area of the sixth accumulated temperature Significantly reduced.