Study On Application Of Improved Aged Refuse In Lawn Production

A large number of research results showed that aged refuse had great potential in terms of land use due to its rich nutrition. However, due to the high content of heavy metals in aged refuse and its salt content seriously overweight, directly regarded refuse as a land additive in land use had some risks. Therefore, this paper was proposed to add certain amendment to improve aged refuse, then the improved aged refuse was used as a soil additive in land use. Considering the heavy metals in aged refuse had toxic effects on the human body, and the improved aged refuse was used as a food crop cultivation soil was not suitable, so we choose the improved aged refuse as ornamental of Festuca arundinacea lawn cultivation soil to land use. This can not only achive the aim of utilization of landfill, but also avoid the waste of common agricultural soil in the process of conventional lawn production.This paper has systematically conducted a series of grass lawn soil experiment which took aged refuse as the application of lawn soil. Choose different amendment, the feasibility of this method was analyzed through measuring the plant height, germination rate, fresh weight, chlorophyll content of Festuca arundinacea and the soil physical and chemical characteristics of the improved soil to determine the best improved formula of aged refuse. The results showed that:1) Fly ash has a significant role of soil improvement to aged refuse. Adding different proportions of fly ash and aged refuse to do mixed soil experiments, the mixed soils showed significant improvement. When aged refuse/fly ash was4/6, the improved effect was significantly obvious.2) Based on adding fly ash to improve aged refuse, and then add straw stalk powder to be further improved, compared to not adding straw powder group, the straw stalk powder showed obvious improvement. When the straw stalk powder content is9%, the improved effect was most obvious.3) Based on adding fly ash to improve aged refuse, and then add the furfural residue to be further improved, compared to not adding the furfural residue group, the furfural residue didn’t show a significant improved effect, and even suppressed the growth of Festuca arundinacea. 4) After planting Festuca arundinacea for20d, the soluble salt content of each cultivation soil decreased sharply. There were signs that the grass had the reverse recovery effect to aged refuse, but this conclusion should be further certificated.5) Furfural residue did not show obvious improvement when planting Festuca arundinacea, but the experimental results showed that furfural residue had certain improved effect to aged refuse soil. Furfural residue may be more suitable for planting other acid-resistant grass.