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从能值角度分析新疆于田县2003~2012年绿洲农业经济生态系统的可持续性。结果表明:12003~2012年于田县绿洲农业总投入能值匀速升高(5.55~7.53×1020 sej),工业辅助和劳力输入能值增幅大于环境资源能值,不可更新的表土损失能值持续增加,于田县绿洲农业生产对外界资源投入的依赖加剧;该县能值产出以种植业为主(85.54%~93.90%),且2003~2012年总体呈下降趋势。2于田县绿洲农业能值自给率低,投入率高,且在2003~2012年间分别下降和升高,同时净能值产出率较低,说明该县能值效率低,独立发展能力差,竞争力弱。32003~2012年于田县绿洲人均能值用量和能值密度有所提高,但整体水平均较低,说明近10年来于田县农业经济有所发展,但仍处于欠发达阶段。4研究期间于田县绿洲农业系统稳定性和土壤强度略升;环境负荷率在2008年后迅速增加;系统可持续性连续下降。
Analyzing the Sustainability of Oasis Agricultural Economic Ecosystem in Yutian County, Xinjiang from 2003 to. The results showed that the total emergy input of Yutian oasis increased from May 2003 to 2012 (5.55 ~ 7.53 × 1020 sej), the increase of industrial auxiliary and labor input emergy was larger than that of environmental resources, and the value of non-renewable topsoil lost continuously Increased. The dependence of agricultural production in Yutian Oasis on the input of external resources was aggravated. The emergy output of the county was dominated by farming (85.54% ~ 93.90%), and the overall trend of decline was from 2003 to 2012. 2 The Yutian Oasis agricultural self-sufficiency rate is low, the input rate is high, and decreased and increased respectively from 2003 to 2012, meanwhile, the output value of the net emergy energy is low, which shows that the county has low energy efficiency and poor independent development ability , Weak competitiveness. From 2002 to 2012, the per capita energy use value and energy density of Yutian Oasis increased but its overall level was low, indicating that the development of agricultural economy in Yutian County has been developing in recent 10 years, but it is still underdeveloped. 4 During the study period, the stability and soil strength of Yutian oasis agricultural system slightly increased; the environmental load rate increased rapidly after 2008; and the sustainability of the system declined continuously.