黄土高原道路边坡绿化土壤基质筛选

Study on the different growing media for road slope greening in Plateau Loess

目前边坡绿化中,喷播绿化基质通常使用木纤维和稻纤维,在北方地区由于其成本过高等原因,限制了该地区边坡绿化的进程。以本地所产的小麦及玉米秸秆加工成的基质纤维对原本木纤维及稻纤维进行对比试验,利用面积为60cm×60cm的土胚培养供试草种,用不同纤维种类和含有不同纤维质量分数的土壤基质对禾本科、豆科的种子发芽率和苗生长状况进行差异性分析,结果表明,纤维种类对于供试种子的发芽率和苗生长均无显著影响,只是表现在木纤维的起初发芽率较高上,而不同纤维质量分数的土壤基质的变化对发芽率和苗生长也均无显著影响,但根据该试验和前人的研究结果,最终得出本地所产的植物纤维可以替代稻纤维及木纤维,且纤维质量分数建议选用3%。

At present, the substrate for uncovering road slope revegetation was fibers of wood and rice straw, but their use in northern China was often restricted because of their expensive for use. In this paper, two fibers from native wheat and maize straw were compared with the wood and rice fibers. Using 60 cm×60 cm culture dish we carried out an experiment of growing media from different wheat and maize straw for Legume and cereal seed to compare the differences of herb germination and seedling length influenced by the four fibers. The results showed that there were no significant difference of herb germination and seedling length for the four kinds of fiber. So the fibers from native wheat and maize straw could be used as a good growing media for road slope greening and the percent of fiber was 3 % of the whole weight of the substrate.