Experimental Study on Preparing Spray Seeding Matrix with Greening Waste Compost

LIU Guanhong; ZHANG Sen; GUO Xiaoping; ZHANG Xu; LUO Chao; XIE Qian; LI Yuanyuan; LI Lei; GUO Qian'en

doi:10.19672/j.cnki.1003-6504.2018.05.013

Abstract：The treatment object is the rock slope at Beijing West Sixth Circle K145+600. Based on the construction experience and the preliminary results of preliminary simulation experiments, 4 different spray seeding matrix (A1, A2, A3, A4) were configured to conduct field spray contrast test with 7 different materials like local loam and green waste composting.A1 matrix is a mixture of green waste composting and peat which will be used as a fertilizer. The fertilizer used in matrix (A2:30％; A3:40％) is green waste composting;A4 matrix which is the contrast is peat matrix that is currently used in slope greening commonly. The physical and chemical properties of the matrix and plant growth index were dynamically monitored, and the stability and fitness of the initial matrix were evaluated by principal component analysis. The results show that there were no significant difference on bulk density, total porosity, moisture content, shear strength and surface hardness among the four matrix, however, the difference among the four kinds of matrix is relatively large on non capillary porosity, infiltration rate, organic matter content, total nitrogen content and thirty-sixth day's emergence number. The comprehensive fitness scoring order of the 4 matrix is A3>A2>A4>A1, indicating that A2, A3 are better than A4 peat matrix. A2 matrix is 70％ of soil, 30％ of waste compost, 100～150 g/m3 of binder, 250～300 g/m3 of water retaining agent; A3 matrix is 60％ of soil, 40％ of waste compost, 100～150 g/m3 of binder, 250～300 g/m3 of water retaining agent.