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| Function and value assessment of soil and water conservation under six patterns of the Grain to Green Program in the Three Gorges Reservoir Area of the Yangtze River |
| Liu Yong1, Wang Yujie1, Wang Hongxia2,Wang Yunqi1, Sun Suqi1, Qin Fanghua1, Liu Liziyuan1 |
1. Key Lab. of Soil and Water Conservation and Desertification Combating of the Ministry of Education, 100083,Beijing, China;
2. Planning and Design Institute of Forest Products Industry, 100010, Beijing, China |
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Abstract Based on the survey data of the 30 grain plots of 22 regions (counties) within the Three Gorges Reservoir Area, the benefits and economic value of water and soil conservation under six different patterns of returning cropland to forest were assessed with reference to the forest ecosystem services assessment specification (LY/ T 1721—2008). Results showed that: 1) The total amount of conserved water was 1 167.91 ×106 t/ a, the value of regulated water was 68.37 伊108 yuan/ a, the value of purified water was 24.42 ×108 yuan/ a, and the value of conserved water was about 92.79 ×108 yuan/ a. 2) The total value of conserved soil was 90.36 ×106 yuan/ a, including Pinus massoniana Lamb. forest (15.31 ×106 yuan/ a), Larix gmelinii ( Ruprecht) Kuzeneva forest (22.51 ×106 yuan/ a), Phyllostachys pubescens forest (10.31 ×106 yuan/ a), Castanea mollissima Blume forest (28.15 ×106 yuan/ a), Citrus reticulata Blanco forest (11.57 ×106 yuan/ a), and Camellia sinensis (L. ) O. Ktze. forest (2.51 ×106 yuan/ a). 3) Significant differences of water and soil conservation benefit assessments existed among six different patterns of returning cropland to forest. Therefore, in addition to overall evaluation of the ecological benefits of the Grain to Green Program in the Three Gorges Reservoir, the effects of different patterns should also be considered, which would further help assess and guide the implementation of the Grain to Green Project. 4) To evaluate the quality of a specific pattern of the Grain to Green Program, various ecologic benefits should be comprehensively considered.
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Received: 10 December 2013
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