玉溪市不同海拔高度耕地及热量资源特征分析

Different height and heat analysis of characteristics of cultivated land resources in Yuxi

以玉溪市国土资源统计公布的数据资料为基础,采用GIS计算机图形处理技术进行数据分割处理,对不同海拔区域耕地资源及气候配置状况进行分析。结果表明:全市耕地在350～2 650 m海拔均有分布,主要集中在1 300～2 000 m海拔范围内、达15.42万hm2;湖盆区耕地分布在1 100～2 650 m的中高海拔范围内,随着海拔高度的增加,热量资源呈递减趋势,年平均气温19.26～10.79℃,≥10℃活动积温6 701.6～2 365.7℃;哀牢山东坡海拔高差较大,耕地分布在350～2 550 m海拔范围内,年平均气温22.96～12.25℃,≥10℃活动积温8 039.0～2 346.2℃。

Based in the statistics data of Yuxi land and resources, using GIS computer graphics treatment techniques for data segmentation processing, different altitude area of cultivated ]and resources and climate distribution conditions were analyzed. The results showed that： The cultivated land from 350 m to 2 650 m altitude were distribution, mainly concentrated in the 1 300 m to 2 000 m range, 154 200 hm2; Hupenqu cultivated land distribution in the 1 100 m to 2 650 m high altitude of range, with the rising of altitude, the heat resources was degressive tendency, average temperature of 19.26 to 10.79℃, 10℃ activities in frequency 6 701.6 to 2 365.7℃ accumulative temperature; Elevation difference was bigger in east slope of Ailaoshan, cultivated land distribution in the 350 m to 2 550 m altitude range, average temperature of 22.96 to 12.25℃, 10℃ activities in frequency 8039.0 to 2 346.2℃ accumulative temperature.