Abstract: Producing soilless sod using waste not only recycles waste, but also reduces the production cost of sod. Different wastes with manilagrass (Zoysia matrella) are used as material to select an optimal mixture and provide some theoretical guidance for soilless sod production. Extreme vertex design is applied using bio-solid as the major substrate, with mushroom compost, rice hull and sand as mixing ingredients. The physical and chemical properties of twelve tested mixtures, manila grass sod performances and its integrated turf quality are analyzed. The significantly correlative regression model between integrated turf quality and mixture factors is established. Results indicate that sod-forming rate, establishment rate, above and underground biomass, sod weight, chlorophyll content, root activity and density all differ significantly among each tested mixture (P＜0.05). The optimal mixture is bio-solid, mushroom mulch, rice hull and sand at 71.75% to 72.85%, 9.7% to 11.7%, 3.13% to 3.67% and 12.54% to 14.66% (by volume), respectively. Manila grass sod can enrich heavy metals and allows the heavy metal content of substrate to significantly decrease after harvesting manila grass sod.

Key words: Biosolid, Soilless manilagrass sod, Substrate mixtures, Optimization

摘要： 利用污泥等废弃物生产无土草皮可以使废弃物循环利用,还可以降低生产成本,因此以马尼拉(Zoysia matrella)为材料,利用不同废弃物筛选出最优的基质配方,为无土草皮的生产提供依据。采用混料设计中的极端顶点设计,以污泥为主要基质,蘑菇渣、稻壳和沙子为配材,对12个不同配方基质的理化性质、无土草皮的坪用性状及综合品质进行评价,建立草皮综合品质与各配方因子之间显著相关的回归模型。结果表明:不同配方基质草皮的成卷时间、成坪时间、地上生物量、地下生物量、草皮重量、叶绿素、根系活力、密度等坪用性状差异均显著(P＜0.05),通过对回归模型的优化分析,筛选出优化配方方案为:污泥71.75％~72.85％,蘑菇渣9.7％~11.7％,稻壳3.13％~3.67％,沙子12.54％~14.66％。马尼拉草坪草可富集较多的重金属元素,收获草皮后的基质中重金属含量大幅降低。

关键词: 污泥, 马尼拉无土草皮, 基质配方, 优化