Soil Nutrients of Different Types of Shrub Grassland

In order to promote the construction of artificial vegetation,the restoration of the ecological environment and the development of animal husbandry in karst area of Guizhou,the effects of different suitable shrubs on soil chemical properties were evaluated.It was investigated to the soil chemical properties of five kinds of Guizhou suitable shrubs grasslands at different levels(0~10cm,10~20cm and20~30cm).The results showed that the hydrolysis nitrogen and available potassium content in the0~10cm soil layer of Indigofera amblyatha shrub grassland was significantly higher than that of the other four kinds of shrub grassland(P0.05),the content of available phosphorus in Nutgall Tree and I.amblyatha shrub grassland was higher than that of Viciifolia,Lespedeza,Crotalaria shrub grassland(P0.05);The total nitrogen and total phosphorus content of Nutgall Tree and I.amblyatha shrub grassland was relatively high.With the deepening of soil layer,the hydrolysable nitrogen,available phosphorus,available potassium and total nitrogen,total phosphorus,total potassium content of different shrub grassland in soil vertical profile decreased gradually.The soil organic matter content and pH value of Nutgall Tree and Crotalaria shrub grassland was significantly higher than that of other shrub grassland(P0.05).Research and analysis indicated that the distribution of I.amblyatha shrub grassland soil nutrient is better than other shrub grasslands.