Effects Of Different Grain For Green Mode On The Soil And Growth State Of Plant Communities In Pianguan District

This paper selects the Western Hills, Lujiayao Village, Xinguan Town, Pianguan District, Shanxi province as a pilot for study. It take the plant communities for different Grain for green mode and it’s soil properties as object. It adopted the on-site survey and experimental research method. Meanwhile, we set the index from several aspects, such as the growth state, soil properties, and hydrology. After studied the soil properties and growth state of plant communities for different Grain for Green mode,we got the results as follows:Now, all woodland vegetation is in good condition. Caragana shrub growth is the best. The effect of fast-growing poplar is significantAccording to the biomass survey, Caragana>Chinese pine>pine, poplar mixed forest>grassland. At the same time, Caragana shrubs have economic value.The correlation between the properties of soil and forest types was not obvious. However, after comparing the data figure we found:between0-20cm of soil layer, in the Caragana shrub woodland, soil porosity has an increasing trend; holding capacity, drainage forces have a reinforced trend; the mixed woodland is the second. Not Abandoned Lands’s changing is not obvious.This trend is also obvious between20-40cm soil layer in mixed woodland, shrubbery. And the optimization effect of soil is obvious. There is no significant difference in the hydrology indicators. But according to the data analysis charts, you can see the amount of water descending sort order is Caragana shrubbery> pine, poplar mixed forest> grassland> pine forest land> farmland. Basically, it is same as the healthy trends of soil structure and consistent. Under different forest stand conditions, soil erosion, runoff, runoff coefficient has a very significant difference. The difference between the Erosion correlation coefficient caused by different natural rainfall is significantly. The different soil erosion caused by forest stand and rainfall is significantly. Grassland’s erosion, runoff, runoff coefficient is the largest.Caragana shrubbery’s runoff is minimum. Economic forest (pine, poplar mixed forest)’s amount of erosion, runoff coefficient is minimum.On the whole, in optimizing soil structure and reducing runoff aspect, Caragana and pine, poplar mixed forest are better. They can be used as the choice of Returning farmland species.