大石桥气候资源特征变化对农业的影响

目的]了解气候变化对农业生产的影响,为发展农业和农业结构调整提供依据。方法]应用常规数理统计方法,进行气候资源特征和趋势变化分析。结果]与1980年农业资源普查相比,年日照时数平均减少257h,年平均气温升高1.2℃,年降水量减少77mm。50a内年日照时数减少482h,年平均气温升高2.55℃,年降水量减少185mm。结论]日照时数减少对设施农业影响较大;气温升高可延长作物生育期,提高生物产量,同时也给害虫及病菌提供了滋生条件;降水量减少增加了旱灾次数。

Effect of Climate Resources Variation on Agriculture in Dashiqiao City

Objective]The aim was to study effects of climate change on agriculture production,and provide basis for agriculture development and structure adjustment. Method]The conventional mathematical statistics method was adopted to analyze the variation of climate characteristics. Result]Compared with 1980 census of agricultural resources,the average annual sunshine hours reduced 257h,average temperature increased 1.2 ℃,annual precipitation decreased 77mm. The annual sunshine hours reduced 482 h in 50a,the annual mean temperature trends rised 2.55 ℃,annual precipitation decreased 185mm. Conclusion]The reduction of sunshine hours has a greater impact on the facilities of agriculture; the increase of temperature can extend crop growth period and improve biomass production,provide a breeding conditions for pests and pathogens; reduction of precipitation increase drought disaster times.