Planning for comprehensive desertification control in Karst area of Guangxi Zhuang Autonomous Region

Guangxi is one of the most serious desertification regions in southwest China and its desertification is featured by wide distribution,deep extent and in important ecological zone.Many successful measures and models were formed in the last 30 years' effort for rock desertification control.Classification guidance is helpful for desertification control and then the selection of control models,technique and management to increase the effect of comprehensive treatment.For the rock desertification control,the Karst area was divided into 4 groups: mountain and hill region in northeast Guangxi,basin region in central-south Guangxi,mountain region in northwest Guangxi and hill region in southwest Guangxi,respectively.Taking the small watershed as a unit and the river as the main rout,the mountain,river,cropland,forest and road were synthetically planned.And then,the plant,engineering project and farming cultivation were combined to effectively utilize limited water resource.And some ecological models,such as "livestock-biogas-crop" model,planting trees at hill peak,bamboos at hill side,fruit at the foot of the hill,corn at ground and mulberry at bottomland,were used to utilize the grassland resources and develop animal husbandry,which also can improve the ecological environment and promote production and living conditions of the people.