| Grain for Green Project in China to strengthen ecological and environmental protection is a major project, the results for the Grain for Green Project, its rational and scientific evaluation of ecological benefits, Grain for Green Project has become a hot research now. In this paper, land use change, biomass, soil properties, canopy interception effect of several aspects evaluate ecological benefits.Cili County Forest land use structure with the implementation of the project has undergone great changes. Arable of land reduce 14244.16hm2, woodland increased 23411.1hm2, construction land increased 2171.58hm2, unused land reduce the 5677.26hm2. Forest cover, land use, land utilization gradually increased, land reclamation rate gradually decreased. County land use change drivers includ natural factors, policy factors, economic development, population growth factors.Forest biomass, litter thickness increased as the project period, and continuously improve the physical and chemical properties of soil, interception rising, the rain on the surface to reduce erosion, reduce runoff, soil and water conservation has played a role. The farmland soil silt and clay accounted for the main part of the capacity of important soil bulk density greater than the forest soil, indicating that soil porosity, large pore, permeable breathable performance. Biomass of different forest farmland has obvious differences, Surface soil organic matter were significantly different. Joe canopy interception, interception herb layer has significantly different, Mixed Litter water generally is greater than pure forest litter water capacity.Cili County Forest Ecological Indicator System project, including the six-level indicators and 11 secondary indicators, level indicators, including protection of water resources benefits, benefits of soil conservation, carbon sequestration and oxygen efficiency, clean up environmental benefits, improved micro-climate benefits, protection of biodiversity benefits. After calculated Cili County Forest Project in 2010 the total value of ecological benefits is 814,945,500 yuan. Protection of water resources which accounted for 53.43% the total value of ecological benefits, ecological benefits of conservation of soil accounted for 1.41% of total value, accounting for carbon sequestration value of ecological benefits of oxygen the total value of 40.95%, cleaning up the environment accounted for 0.14% of the total value of ecological benefits and improve the microclimate value of 4.07%, the total value of ecological benefits, the value of the conservation of biological diversity, ecological benefits accounted for 4.60% of total value. |
PDF Full Text Request