沙坡头人工植被防护体系防风固沙功能价值评价

Evaluation of ecological service value of wind-break and sand-fixation function of ShaPotou sand-binding vegetation ecosystem

本文将沙坡头人工固沙植被防护体系防风固沙功能机制分为枝柴栅栏、草方格沙障和人工植被三部分,评价了该体系防风固沙功能价值.结果表明:沙坡头人工固沙植被生态系统每年拦截流沙物质量为2.79×108m3,其中枝柴栅栏拦截1.76×103m3,草方格沙障拦截8.5×105m3,人工固沙植被拦截2.78×108m3.利用机会成本法算出由此而产生的经济价值是5.93×108元.本文的研究结果对进一步准确评估沙坡头防护体系服务功能有一定的参考价值.

In this paper, the function mechanism of wind-bread and sand-fixation is divided into three parts, such as barrier straw checkboard and sand-binding plant for evaluating the material and menetary assessment of the sand-binding vegetation ecosystem in shapotou. As a result, the total quantity of moving sand held up by sand-binding vegetation ecosystem is 2.79 ×10^8m^3 ,and of this, the quantity of moving sand held up by sand-binding vegetation is 2.8 ×10^8m^3, followed by the quantity of moving sand held up by straw checkboard being 8.5 ×10^3m^3, and the quantity of moving sand held up by the barrier being 2.26 ×10^3m^3. Then using opportunity cost method, we concluded that the overall ecological service value（ESV） of wind-break and sand-fixation function of sand-binding vegetation ecosystem is 5.93 ×10^8 Yuan. The result provides a scientific basis for further evaluation of Shapotou sand-binding vegetation ecosystems evaluation.