Improvement and Substitution Effects of Park Planting Soil in Ningbo Urban Area
To obtain low-cost and efficient improvement technologies for mucky clay soil in Ningbo urban parks,the plot experiment was conducted and the effects of different improvement and alternative methods on the physicochemical properties of topsoil(0-30 cm)and subsoil(30-100 cm)were investigated.The result showed that the replacement with dried construction residue(DCR)or the addition of landscaping waste compost(LWC)were the optimal improvement methods for topsoil.During which,soil physicochemical properties(except pH)gradually stabilized in 18-24 months,and met the requirements of the Standard of Green Planting Soil.For subsoil,the addition of LWC had a significant effect on improving soil properties.The higher the addition amount of LWC,the better the soil physical structure and fertility.For the need of improvement,the volume ratio of soil and LWC should be 6:1-6:2.With the increase of time,soil pH,organic matter and total nitrogen gradually converged under different treatments,and the soil bulk density and pH continuously increased.However,the improvement effect can be guaranteed within two years.It was concluded that DCR mixed with LWC could be used for park planting soil in Ningbo urban area,and DCR could replace yellow soil as top planting soil to realize the resource utilization of waste.
park planting soillandscaping wastecompostsoil improvement
万方数据
维普
