灌溉排水学报2024，Vol.43Issue(3)：39-44,6.DOI:10.13522/j.cnki.ggps.2023290
园林废弃物覆盖组分及厚度对土壤水分物理性质的影响
Comparison of hydraulic properties of soils mulched by different garden wastes
摘要
Abstract
[Background and Objective]Organic mulch involves covering the soil surface with organic materials.While it has been recognized as an environmentally friendly method for reusing organic waste,improper mulching with organic wastes might degrade soil structure,hinder vegetation growth,and lead to environmental pollution.This paper is to investigate the alterations in soil hydraulic properties resulting from various garden waste mulches.[Method]The study is based on incubation.Garden wastes including grass clippings,tree leaves,tree branches,and branch-leaf mixtures are used to mulch the soil surface at a thickness ranging from 3 to 9 cm.The incubation lasts 21 months,after which we measure soil moisture content,bulk soil density,soil porosity,soil aeration,water holding capacity,and soil hydraulic conductivity.Their variations with the garden waste types and the mulching depth are analyzed.[Result]① Mulching with all garden waste types increases soil hydraulic properties,albeit the improvement depends on the waste types and mulching thickness.② Compared to without mulch,mulching reduces soil bulk density significantly by 5.6%-13.6%,increases the maximum soil water holding capacity by 31.9%-108.2%,capillary water holding capacity by 36.7%-114.2%,field water holding capacity by 64.1%-149.8%,and drainage capacity by 38.2%-67.1%.③ Comprehensive evaluation reveals that those that were effective for improving hydraulic properties of soil are:9 cm tree leaves,9 cm grass clippings,9 cm branch leaves,6 cm grass clippings,mixture of 6 cm branch leaves and 9 cm tree branches.[Conclusion]Mulching soil with garden wastes can increase soil porosity and drainage capacity,thereby improving water-holding capacity of the soil.However,care needs to be taken in selecting waste types and mulching thicknesses in practical application in order to optimize mulching benefits.关键词
废弃物/覆盖物/土壤水分物理性质/因子分析Key words
waste/mulches/soil hydro-physical properties/factor-analysis分类
农业科技引用本文复制引用
毛晓宁,史正军,谢惠春,袁峰均,潘松..园林废弃物覆盖组分及厚度对土壤水分物理性质的影响[J].灌溉排水学报,2024,43(3):39-44,6.基金项目
国家重点研发计划(2021YFE0193200),深圳市城管和综合执法局科研项目(202018,202201) （2021YFE0193200）
