Study On Spatial And Para Position Allocation For Protection Forest In Small Watershed In Ao HanQI, Chifeng

Protective forest function are including of storage water, soil and water conservation, storm protection and sand-binding, keeping ecological balance, reducing natural disaster and safeguard and promotion industrial and agricultural production. Protective forest has an important meaning for high quality environment to human. According to the goal of healthful forest ecosystems and the direction theory of structure disposition optimumazation of protection forest system, the research is based on the analysis of actualities of protective forest in Dawujia Small Watershed in Ao HanQI of Chifeng. The results indicated that:(1)Based on the comprehensive survey of forest, soil, understory vegetation, ect. 3 group of site type and 8 site types are classified based on the comprehensive analysis the relationship between forest growth and site factors in small watershed by the principal component analysis.(2)After the forest types optimization by AHP method, wind shelter and sand fixation forest,farmland and ranch shelterbelts , water conservation forests, soil and water conservation forest, revetment forests and protective belt along a road account for 28.13%, 25.88%, 14.26%, 13.75%,10.14 and 7.83% respectively. Comprehensive analysis the relationship between forest types and factors which can be able to respond protective functions. Screening some stronger tree species of protective functions such as the mixed forest of Populus simonii Carr and Caragana microphylla, the mixed forest of Pinus tabulaeformis Carr and Hippophae rhamnoides L and pure forest of Caragana microphylla.(3)According to the principles of structure disposition optimumazation and protective goals of protection forest in small watershed, designed the mixed forest of Populus simonii Carr and Caragana microphylla, the mixed forest of Pinus tabulaeformis Carr and Hippophae rhamnoides L and the mixed forest of Larix principis-rupprechtii Mayr and Caragana microphylla and four types pure forest include Pinus tabulaeformis Carr, Populus simonii Carr, Caragana microphylla and Hippophae rhamnoides L from site preparation, tree species selection, spacing in the rows, mixed mode under the different types of site conditions.