新疆莎车县土地整治项目碳效益研究

Studies on Carbon Benefit of Land Improvement Project in Shache County of Xinjiang

本文将新疆莎车县土地整治项目作为研究对象,以土地整治过程中工程措施、土地利用结构和农田管护系统三个方面的碳效应为基础测算碳效益。结果表明:(1)土地整治后,项目区碳输入89444.80 t,碳输出72085.35 t,净碳汇为17359.45 t。(2)工程措施中灌溉排水工程碳效益最低;土地利用结构中居民点及工矿用地和耕地面积矢量变化的差异分别形成最小贡献率-581.41%,最大贡献率448.59%;农田管护系统中生态效率、经济效率、生产效率分别是4.75 t/tC、1.29t/tC、5.55 t/tC。

In this paper,the land improvement project of Shache County of Xinjiang was taken as the research object,and the carbon effect was calculated based on the carbon effects of engineering measures,land use structure and farmland management and protection system in the process of land remediation.The results showed that:(1)After the land was rectified,the carbon input in the project area was 894.44480 million tons,the carbon output was 72085.35 t,and the net carbon sink was 17359.45 t.(2)The carbon benefit of irrigation and drainage engineering was the lowest in engineering measures;the difference of residential area,industrial and mining land and cultivated land vector change in land use structure respectively forms the minimum contribution rate-581.41%,the maximum contribution rate was 448.59%;the ecology of farmland management and protection system efficiency,economic efficiency,and production efficiency were 4.75 t/tC,1.29 t/tC,and 5.55 t/tC,respectively.