近58年沈阳地区积温变化趋势及其对农业生产的影响

目的]研究沈阳地区近58年积温变化趋势及其对农业生产的影响。方法]利用沈阳地面气温资料,应用气候统计学方法,分析了近58年沈阳≥0℃、≥10℃积温变化趋势,并探讨了积温变化对农业生产的影响。结果]近58年来,沈阳地区气温≥0℃初日提前约10 d,终日推后不明显,持续日数延长13 d,≥0℃积温增加343℃;≥10℃初日提前约9 d,终日推后8 d,持续日数延长16 d,≥10℃积温增加370℃;后20年平均值与前20年相比,≥0℃、≥10℃持续日数均延长9 d,≥0℃、≥10℃积温分别平均增加196、202℃。另外,沈阳地区热量的增加对当地农业生产有一定影响。结论]该研究可为当地掌握热量资源变化特征及调整农业布局提供理论依据。

Change Trend of Accumulated Temperature and Its Effects on Agricultural Production in Shenyang during Recent 58 years

Objective] The aim was to study the change trend of accumulated temperature in Shenyang in recent 58 years,as well as its effects on agricultural production.Method] Based on the surface temperature data in Shenyang,the change trend of ≥0 ℃ and ≥10 ℃ accumulated temperature in Shenyang in recent 58 years was analyzed by means of climatic statistics method,and the effect of accumulated temperature variation on agricultural production was discussed.Result] In recent 58 years,the first day with temperature ≥0 ℃ was advanced 10 days,and the last day was put off slightly,while sustained days was prolonged 13 days,and ≥0 ℃ accumulated temperature was increased by 343 ℃;meanwhile,the first day with temperature ≥10 ℃ was advanced 9 days,and the last day was put off 8 days,while sustained days was prolonged 16 days,and ≥10 ℃ accumulated temperature was increased by 370 ℃;compared with the first 20 years,sustained days with temperature ≥0 ℃ and ≥10 ℃ was prolonged 9 days in last 20 years,and ≥0 ℃ and ≥10 ℃ accumulated temperature were increased by 196 and 202 ℃,respectively.In addition,the increase of heat resources affected agricultural production in Shenyang.Conclusion] The study could provide theoretical foundation for grasping heat resources variation and adjusting agriculture distribution.