摘要
以上海典型搬迁地土壤为研究对象,研究了厨余垃圾沼渣堆肥、化学改良剂(β-环糊精、硫酸钙和氧化铁)单施以及混施对土壤物理性质、化学性质的影响,并对各处理土壤质量进行了综合评价,以探究最佳土壤改良配方。结果表明:沼渣堆肥能显著降低土壤容重,提高土壤毛管孔隙度、总孔隙度、饱和持水量、田间持水量和入渗率等物理性质(P<0.05);显著降低土壤pH,提高土壤电导率和有机质、水解性氮、有效磷和速效钾含量等化学性质;随着沼渣堆肥施加量的增加,其对土壤理化性质的改良效果越显著(P<0.05),其中,20%沼渣堆肥+3 kg/m^(3)化学改良剂混施改良效果显著优于单施20%沼渣堆肥、单施3 kg/m^(3)化学改良剂(P<0.05)。土壤质量评价综合得分大小关系为:30%沼渣堆肥处理>20%沼渣堆肥+3 kg/m^(3)化学改良剂处理>20%沼渣堆肥处理>10%沼渣堆肥处理>3 kg/m^(3)化学改良剂处理>对照,各改良配方对搬迁地土壤质量均有改良作用,其中30%沼渣堆肥改良效果最佳。
Taking the typical relocated site soil in Shanghai as the research object,the effects of single and mixed application of food waste biogas residue composting and chemical conditioner(Beta-cyclodextrin,Calcium sulphate,Iron(III)oxide)on soil physical and chemical properties were studied,and the soil quality of each treatment was evaluated comprehensively in order to explore the best soil improvement formula.The results showed that biogas residue composting significantly reduced soil bulk density,improved soil capillary porosity,total porosity,saturated water capacity,field water capacity,infiltration rate and other physical properties(P<0.05),significantly reduced soil pH,improved soil electrical conductivity,organic matter,hydrolytic nitrogen,available phosphorus and available potassium.With the increase of the application amount of biogas residue composting,the improvement effects on soil physical and chemical properties were more significant(P<0.05),and the improvement effect of combined application of 20%biogas residue composting and 3 kg/m^(3) chemical conditioner was significantly better than that of 20%biogas residue composting alone and 3 kg/m^(3) chemical conditioner alone(P<0.05).Compared with CK(without biogas residue composting and chemical conditioner),other treatments all promoted soil quality,and the comprehensive score of soil quality evaluation was as follows:30%biogas residue composting treatment>20%biogas residue composting and 3 kg/m^(3) chemical conditioner treatment>20%biogas residue composting treatment>10%biogas residue composting treatment>3 kg/m^(3) chemical conditioner treatment,therefore,30%biogas residue composting is recommended for application due to its best effects in soil improvement.
作者
伍海兵
何小丽
梁晶
WU Haibing;HE Xiaoli;LIANG Jing(Shanghai Academy of Landscape Architecture Science and Planning,Shanghai 200232,China;Shanghai Engineering Research Center of Landscaping on Challenging Urban Sites,Shanghai 200232,China)
出处
《土壤》
CAS
CSCD
北大核心
2024年第5期1137-1143,共7页
Soils
基金
上海绿化和市容管理局科技攻关项目(G230201)
上海市科委科技创新行动计划科技支撑碳达峰碳中和专项(21DZ1209403)资助。
关键词
厨余垃圾沼渣堆肥
搬迁地
土壤质量
主成分分析
Food waste biogas residue composting
Relocation site
Soil quality
Principal component analysis
