文章阐述了轻型基质的研究现状,利用菇渣、锯末、羊粪等常见废弃物配比成十种基质,对不同基质的容重、最大持水量、基质相对含水量;有机质、全磷、全氮、全钾等理化性质进行测定、对比和分析,发现4号基质具有容重小、保水性好,有机质含量高等特性,更加适用于北方屋顶绿化的生产实践。 In this paper, the research status of light matrix is ​​described. Ten kinds of matrixes, such as mushroom residue, sawdust, sheep manure and other common wastes, are used to study the bulk density, maximum water holding capacity and relative water content of matrix. , Total potassium and other physical and chemical properties of the determination, comparison and analysis found that the matrix 4 has a small bulk density, good water retention, high organic matter content, more suitable for the practice of the northern roof greening.