Impact of Soil and Water Conservation and the Benefit of Water Conservation on Large-area Intensively Managed Plantation

The article quantitatively analyses the ecological benefit during the implementation and after establishment of the National Afforestation Project (NAP) by "the alternative principle of the equal benefit" according to the monitoring results of soil and water conservation on sample and fixed plots of Damingshan Mountain, Guangxi Zhuang Autonomous Region and Zhuting County, Hunan Province. It provides a fundamental theory for the environmental protection and plantation establishment in a right way. Since implementation of NAP for 5 years, the total value of 59.13 million yuan of ecological benefit has been produced among which 28.47 million yuan comes from water conservation, 16.81 million yuan from soil conservation, 13.85 million yuan from fertility conservation. The total value of 191.43 million yuan of ecological benefit would be generated in tropical and subtropical project area for each year after establishment of NAP, 157.56 million yuan comes from water conservation, 6.30 million yuan from soil conservation, 27.57 million yuan from fertility conservation. It strictly followed the guideline of environmental protection to establish intensively managed plantation on a large area by World Bank Loan, which not only generates good economic benefits but also plays an important role in improving ecological environment.