Plant diversity and soil physical-chemical properties in karst rocky desertification ecosystem of Guizhou, China

Karst rocky desertification has been an important ecological issue hindering the economy and society development of South China Karst region, and the control of rocky desertification has been clearly listed in the national projects of economy and society development. But there are highly short of plant diversity and soil science researches in karst rocky desertification ecosystem, and the successions of plant diversity and soil physical-chemical properties are still unclear in the process of rocky desertification, all which hardly hinders the control of rocky desertification well work. Then, the plant diversity and soil physical-chemical properties were surveyed and analyzed by methods of ecological survey, chemical determination, and mathematical statistics. Principal component analysis show that the evenness index of plant diversity together with its correlative soil physical-chemical factors can represent the degradation degree of karst ecosystem. Results have important values in the protection of karst forest ecosystem and the control of rocky desertification.