Abstract: The soil quality of karst rocky desertification region were taken as case studies with four different recover and restoration measures for 13 years long-term fixed site harnessing in Guizhou Province,and plant diversity and soil fertility over different measures were investigated.The results showed that the plant diversity was the lowest,soil feritilities and ecosystem environment were the poorest in the control land with no restoration measure.The plant diversity rised evidently and the soil quality restorated to some degree in the measure of changing into a Zanthoxylum bungeamum woods(Measure A) and the measure of changing into multispecies woods (Measure B).The diversity of auxiliary community were resumed to the best degree and soil quality were resumed to the best degree in measure of closed forest(Measure C).The plant diversity was higher and soil quality was best in measure of secondary forest(Measure D).Therefore,the proper biological measures and the essential engineering measures are effective to recover the serious degradation ecosystem in Karst mountain of Guizhou Province.

Key words: wheat, irrigation treatment, water soluble carbohydrate, grain yield