Experimental Study on Effect of Herbaceous Plants on Strength of Sulphate Saline Soil
In order to explore the effect of herbaceous plant growth on the strength of saline soil,we analyzed the correlation between the biomass and the strength of saline soil.Tall fescia,Ryegrass and Poa pratensis were selected as experimental grasses,and the biomass of different parts of herbaceous plants and the shear strength of root-soil complex were measured regularly.The biomass increment of Tall fescia and Ryegrass was higher than that of Poa pratensis,the strength of the three root-soil complexes was greater than that of root-free soil,and the cohesion was also improved significantly.However,the change in the internal friction angle was not significant;it only increased slightly compared to rootless soil.The growth of herbaceous plants improved the soil strength of sulphated saline soil to a certain extent.It is concluded that the soil fixing effect of Tall fescia and ryegrass on sa-line soil is better than that of Poa Pratensis,Poa Pratensis not suitable for planting on saline soil.
NETL
NSTL
万方数据
