基于植被生长状况贫瘠边坡客土基材中生态添加剂的研究

Research on Ecological Additives in Guest Soil Substrate of Side Slope Based on Poor Vegetation Growth Condition

针对贫瘠边坡土壤层薄,水分、养分保蓄能力极低,植物难以生长,抗雨水冲刷能力较弱等问题,采用对比试验与显著性分析方法,对掺入不同生态添加剂种类和掺量下贫瘠边坡土壤理化性质及植被生长情况进行了分析。结果表明:1)水泥会增大土壤碱性,SAP可为土壤锁住水分,增大掺量时对植物生长均呈现出抑制作用,最佳掺量分别为1%、0.05%;2)淀粉、木质素对文中测试的土壤指标影响不大,但其培育的高羊茅生长后期表现良好,最佳掺量分别为0.15%、0.05%;3)CMC可提高土壤电导率以及土壤养分含量,掺量为0.05%羧甲基纤维素钠(CMC)基材的高羊茅发芽率最高,0.15%CMC基材的高羊茅后期生长效果最佳。结论是各生态添加剂中,CMC对贫瘠边坡土壤改良效果最好,最佳掺量为0.15%。

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%.