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On nature forest protection and degraded ecosystem restoration in Northwest China.

Li Junqing; Cui Guofa. Journal of Beijing Forestry University (2000)22(4)1~7 [Ch,15 ref.]Research Center of Nature Reserve, Beijing For. Univ., 100083, P. R. China.  
The paper puts forward that the recovery ways of degraded ecosystem are conservation, restoration, reallocation and preservation, and that the evaluation index includes bio diversity, ecological keystone species, environment construction. The criterion to evaluate the situation of ecosystem recovery or degradation consists of biomas productivity, organic substance content of soil, maximum containing water of soil, effective rainfall index, utilization efficiency, last period of effective water, N utilization rate, microbe community and circling rate. The methods that should be taken are preservation and reallocation planning, ladder style returning farmland to forestland, radiation style ecological reconstruction, raising the utilization rate of land, founding eco agriculture or forestry company, etc.
【CateGory Index】: S757
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