Research on Ecological Additives in Guest Soil Substrate of Side Slope Based on Poor Vegetation Growth Condition
In view of the problems of thin soil layer,low water and nutrient storage capacity,difficult growth of plants,and weak ability to resist rainwater erosion,the chemical properties and vegetation growth of the soil in the barren slope with different types and ecological additives are analyzed.The results show that:1)the cement will increase the alkalinity of the soil.The SAP can lock in moisture for the soil,but an increasing of its amount would inhibit plant growth.The optimal dosage was 1%and 0.05%,respectively;2)Starch and lignin have little influence on the soil indexes tested in the paper,but its tall sheep cue performed well in the late growth stage.The optimal mixing amount was 0.15%and 0.05%,respectively;3)CMC can improve the soil electrical conductivity and the soil nutrient content.The incorporation of 0.05%sodium carboxymethylcellulose(CMC)substrate has the highest germination rate.The 0.15%CMC substrate has the best late growth effect..The research conclusion is that among various ecological additives,CMC has the best effect on improving poor slope soil,with an optimal dosage of 0.15%.
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