南京林业大学学报（自然科学版）2025，Vol.49Issue(2)：153-160,8.DOI:10.12302/j.issn.1000-2006.202305032
施加生物炭对屋顶绿化土壤径流水质的影响
Effect of biochar application on soil runoff and water quality in green roof
摘要
Abstract
[Objective]Roof greening has become a popular method for increasing urban green spaces and mitigating the urban"heat island effect".Recently,biochar,known for its lightweight and highly porous nature,has been utilized as a soil amendment in the agricultural and forestry sectors.This study explores the impacts of varying biochar application rates and pyrolysis temperatures on soil runoff and nutrient content in roof greening,to assess biochar's potential for enhancing urban roof greening practices.[Method]The experiment involved three levels of biochar application(0％,10％and 20％,volume fraction)and three pyrolysis temperatures(300,400 and 500 ℃),with four replicates per treatment.Each planting box was filled with a 10 cm thick layer of treated soil matrix and planted with Sedum lineare.Soil runoff was collected and analyzed after each rainfall event.[Result]The findings indicated that biochar application could increase soil pH and significantly reduce the levels of total nitrogen(TN)and dissolved organic carbon(DOC)in the runoff.While a 10％biochar addition decreased the total phosphorus(TP)concentration in the runoff,a 20％addition had the opposite effect.Moreover,biochar was effective in reducing soil runoff and nutrient concentration,thus minimizing nutrient loss from the soil.There was no significant difference in the effects of biochar processed at different pyrolysis temperatures on runoff quality.[Conclusion]Optimal biochar application can significantly decrease N and P loss in roof soil runoff,indirectly reducing urban runoff pollution.This suggests a promising application for biochar in managing urban stormwater runoff.关键词
屋顶绿化/生物炭/施加量/热解温度/土壤/径流水质/城市污染Key words
roof greening/biochar/addition amount/pyrolysis temperature/soil/runoff water quality/urban pollution分类
农业科技引用本文复制引用
李娟,薛建辉,熊伟巍,张国微,王翰琨..施加生物炭对屋顶绿化土壤径流水质的影响[J].南京林业大学学报（自然科学版）,2025,49(2):153-160,8.基金项目
江苏省林业科技创新与推广项目(LYKJ202202). （LYKJ202202）
