保水剂对用于高陡岩石边坡人工基质的性状影响

Effects of Water Absorbent Polymer on Water Status and Physical Properties of Special Synthetic Soil Used on High and Cut Rock Slopes

客土基质配方对基质在陡峭岩石边坡上的抗侵蚀能力以及构成客土基质的各个组分及其相互作用对植物生长的影响的研究势在必行。本研究以解决上述工程技术使用过程中的人工基质水分问题为目的,对保水剂加入土壤后的保水、吸水特性及保水剂对土壤物理性质的影响进行系统研究。结果显示:所用保水剂的最大吸水倍率达到500倍以上,将其加入土壤后,土壤水分状况得到显著改善(p<0.05),同时,土壤对保水剂的吸水和保水特性均有显著影响。在30℃及50℃的温度胁迫下,可分别持续保水12h和8h。另外,土壤容重,比重随着保水剂添加浓度的增加而下降,而孔隙度随保水剂的增加而上升,但3个物理变量值在各处理浓度间的差异均不显著(p>0.05)。

The studies about the effects of components added to such soil and the interactions between each of components on plant growth and the erosion against rain of such synthetic soils were very important. Inorder to improve the water status of the special synthetic soils used on the hydroseeding technique, keepiingand-absorbing water properties as well as the effects of water absorbent polymer on soil physical properties were performed. Based on the results, the maximum absorbing content of water absorbent polymer reached to 500 times, and when water absorbent polymer was added into soils, the soil water status was significantly improved （p〈0.05）, and the time of its keeping water could maintain 12h and 8h treated with 30° and 50°, respectively. Forthemore, siol bulk density, specific gravity decreased and total porosity increased with the increase of water absorbent polymer content.