Spatial And Temporal Variation Of Agricultural Climate Resources In Western Sichuan Plateau

Using the ground observation data from 48 meteorological stations and crops developmental phase records from 10 agricultural meteorological stations in Western Sichuan Plateau between 1961 and 2009, and by using statistical methods and GIS software, SPSS software and Microsoft excel, we analyzed the features of temporal and spatial changes of agricultural climate resources in this region in the whole year,the variation characteristics of developmental phase of pasturage, wheat, paddy, and>0℃and>10℃change laws of climatic element. The results indicated that, in 1961-2009, the annual mean temperature in the region showed an increasing trend, with the increment averaged 0.17℃·(10 a)-1. The annual sunshine hours showed decreasing trend in study phase, with the decelerate averaged 22h-(10a)-1.The annual precipitation showed increasing trend, with the increment averaged 6.16mm-(10a)-1.≥0℃initial date order bring forward 2.4d/10a, terminate date order put off 1.1 d/10a,the days between the initial date and terminate date increased 3.5d/10a, the accumulated temperature increased 39.5℃/10a, the temperature increased 0.034℃/10a, the sunshine hours increased 5h/10a,the precipitation increased 4.8mm/10a in the north of Western Sichuan Plateau≥10℃initial date order bring forward 1.8d/10a, terminate date order bring forward 0.16d/10a, the days between the initial date and terminate date increased 1.67d/10a, the accumulated temperature increased 29℃/10a, the temperature increased 0.01℃/10a, the sunshine hours decreased 4.5h/10a, the precipitation increased 11.lmm/10a in the south of Western Sichuan Plateau. In Shiqu, Ganzi, the pasturage's climate trend rate in the period of emergence, anthesis, kernel maturity stage, Wiltingdate is 8.1/10a,-2.7/10a,-0.97/10a,-8.2/10a. The climate trend rate of the days between emergence and kernel maturity stage is-2.8d/10a. In Xichang, Liangshan, the wheat's climate trend rate of the days between date of seeding and heading stage, the days between heading stage and autumn, the days between date of seeding and autumn is-2.67d/10a,2.67d/10a,0.19 d/10a. In Maoxian, Aba, the wheat's climate trend rate of the days between date of seeding and heading stage, the days between heading stage and autumn, the days between date of seeding and autumn is 3.6d/10a,-1.58d/10a,0.73 d/lOa. In Xichang, Liangshan, the paddy's climate trend rate of the days between date of seeding and stooling stage, the days between stooling stage and heading stage, the days between heading stage and autumn, the days between date of seeding and autumn is 0.14d/10a,2.36d/10a,2.5d/10a,5d/10a. In Zhaojue, Liangshan, the paddy's climate trend rate of the days between date of seeding and stooling stage, the days between stooling stage and heading stage, the days between heading stage and autumn,the days between date of seeding and autumn is 3.9d/10a,-4d/10a,7.5d/10a,7.4d/10a. This article analyzed the features of temporal and spatial changes of agricultural climate resources in Western Sichuan Plateau, it will bring into play positive role in disaster prevention and reduction, the monitoring and early warning of meteorological disasters and promote agricultural production.