矿化垃圾的改良及其在草坪生产中的应用研究

在草坪生产过程中,以生活垃圾填埋场矿化垃圾作为农田土的替代物,既实现了矿化垃圾的资源化及垃圾填埋场的可持续利用,又避免了常规草坪生产中对农田的破坏。以粉煤灰为改良剂,对矿化垃圾进行改良,利用改良后的矿化垃圾为基质培养高羊茅。通过测试改良矿化垃圾的保水率、透水率以及高羊茅的株高、发芽率、鲜重、叶绿素等指标,分析了改良矿化垃圾作为高羊茅草坪生产用土的可行性。结果表明,在土壤指标方面,改良后的矿化垃圾保水率与透水率均有所下降,接近于普通农田土的水平;其pH值没有显著变化;但是可溶性盐含量明显降低,其中5∶5组可溶性盐含量降低了51.8%,改良最为明显。在植物指标方面,各改良组的株高均明显优于矿化垃圾组,其中4∶6组高羊茅的株高达到了改良前的117%;各改良组高羊茅的发芽率也明显高于改良前,其中4∶6组其发芽率达到了改良前的122%。改良后的矿化垃圾的物理、化学特性有明显改善,接近于农田土,可以替代农田土作为草坪的培养土。

Improvement study on aged refuse and its application as turf soil

Using aged refuse as turf soil is a promising alternative which not only help in achieving the aim of sustainable utilization of landfill,but also avoiding the destruction of common agricultural soil in the process of conventional lawn production.In this paper,fly ash was used as the amendment to improve the aged refuse,and the cultured substrate was used to plant Festuca arundinacea.The feasibility of this method was analyzed through measuring the water retention and permeability of aged refuse as well as the physiological characteristics of Festuca arundinacea such as plant height,germination rate,fresh weight,chlorophyll etc.The results showed that:in the aspect of soil index,the germination rate of improved aged refuse was slightly decreased to condition which close to common agricultural soil.The pH value of improved aged refuse has no significant change but the soluble salt content decreased obviously.The most significant one was group 5:5 which decreased 51.8%.In the aspect of plant index,the plant height of all improved groups was greater than the aged refuse group where group 4:6 increased the most,i.e.17% compared to pre-improvement.On the other hand,the germination rate of each improved group was also better than the aged refuse group.Group 4:6 was identified as the best condition where the germination rate increased 22% compared to result before improvement.The experimental results showed that the physico-chemical characteristics of improved aged refuse was successfully enhanced to be close to the agricultural soil.It has been proven as a potential alternative of agricultural soil for lawn planting.