The Type Division Of Karst Rocky Desertification Controlling Model And Typical Controlling Model Comparison In Guizhou

The karst mainly distributes in the whole world east Europe, North America with the Chinese north west area. Take Guizhou as the central southwest karst area,about 426,240 square kilometers, whose area is biggest, the type is most complex, the contradiction is most prominent. Guizhou karst area reaches 129,600 k㎡, occupies above area 73.8% in the entire province country, about 90% counties (city) has the karst distribution, this is not ordinary. Since the 1950s, because population increase and the human unreasonable activity, Guizhou karst mountainous area ecological environment becomes worsens day by day, the soil erosion and karst rocky desertification is serious. According to the Guizhou Province karst rocky desertification Remote sensing demonstration of 2007,the karst rocky desertification area reaches 37597.36k㎡, occupies the entire province land area 21.65%.The government and the related researchers very pays attention to Guizhou karst rocky desertification, having established a series of karst rocky desertification government program one after another, and summarized some good experiences and the pattern, for example"dingtan model","pingshang model","qinglong model", courtyard ecological model, taking methane as link countryside energy construction model. But this a series of karst rocky desertification controlling model had still not carried on system's type division. This research first according to landform - ecology economic development direction model, divides karst rocky desertification controlling model for karst canyon area- ecological agriculture controlling model, medium elevation karst mountainous area - planting tea or honey suckle controlling model, high elevation karst mountainous area - planting the grass for animal husbandry controlling model, karst peak clump and marsh land area- planting fruit trees controlling model, karst corrosion rolling country- returning farmland to forest controlling model, karst plateau area - conservation of water and soil and agricultural - forestry - animal husbandry controlling model, other controlling model.According to systematic principle, regional principle, similarity and diversity principle as well as feasibility principle, building controlling model comparison indicator system. Choosing"dingtan model"and"wangjiazhai– yangchangdong small basin controlling model", according to evaluating benefit, social - economy benefit as well as model promotion, one by one analysis, then proposed seven measures to optimize rocky desertification controlling model of karst mountainous area. The paper provides the correct method to Chinese southwest karst rocky desertification controlling model.