鸡粪生物炭施用影响聚乳酸微塑料污染的酸性土壤质量  

Effects of chicken-manure biochar application on the soil quality of polylactic acid microplastic-contaminated acidic soil

作　　者：邹晓燕[1] 曹凯博 王强 汪印[1] ZOU Xiaoyan;CAO Kaibo;WANG Qiang;WANG Yin(Key Laboratory of Urban Pollutant Conversion,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,China;University of Chinese Academy of Sciences,Beijing 101408,China;College of Life Sciences,Fujian Agriculture and Forestry University,Fuzhou 350002,China;College of Environment&Safety Engineering,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]中国科学院城市环境研究所城市污染物转化重点实验室,福建厦门361021 [2]中国科学院大学,北京101408 [3]福建农林大学生命科学学院,福州350002 [4]福州大学环境与安全工程学院,福州350108

出　　处：《农业环境科学学报》2024年第4期866-873,共8页Journal of Agro-Environment Science

基　　金：福建省自然科学基金项目(2022J01510);厦门市自然科学基金项目(3502Z20227239);“一带一路”国际科学组织联盟项目(ANSO-CRKP-2021-08);福建省中科院STS计划项目(2020T3036,2021T3102,2021T3073,2021T3049,2022T3065);中国科学院战略重点研究计划项目(XDA23030301)。

摘　　要：为研究生物炭对可生物降解塑料污染土壤理化性质的影响,以聚乳酸微塑料(PLA-MPs)为研究对象,开展半年的土壤培养实验,分析施用鸡粪生物炭对PLA-MPs污染的酸性土壤质量的影响。结果表明:PLA-MPs污染导致土壤pH升高,造成氮、磷、钾等养分流失,影响土壤碳周转;施用鸡粪生物炭使PLA-MPs污染的酸性土壤变成碱性,脲酶和转化酶活性有不同程度的上调,培养结束时,土壤有效磷和速效钾分别提高61.08%和6.10倍,无机氮锐减64.31%;PLA-MPs和生物炭协同作用下,土壤净全碳变化量与PLA-MPs污染土壤的净碳变化量呈极显著正相关。研究表明,生物炭的施用可减缓PLA-MPs污染造成的磷和钾养分流失,生物炭和PLA-MPs协同影响土壤全碳周转和氮转化。Recently,biodegradable plastics were proposed to solve the issue of microplastic particles(MPs).However,biodegradable MPs may pose stronger negative effects on several soil species than traditional MPs under some conditions.Biochar has been widely used in soil improvement and remediation,but the effects of biochar application on the physicochemical properties of the soil are still limited.Therefore,polylactic acid(PLA)MPs were selected as the research object,and a half-year soil culture experiment was conducted to analyze the effects of chicken-manure biochar on the quality of PLA-MP polluted soils.The results revealed that PLA-MPs pollution caused an increase of soil pH,posed the loss of nutrients(e.g.,nitrogen,phosphorus,and potassium),and influenced the soil carbon turnover.The alkalization of acidic soils and the varying upregulated activities of urease and invertase were observed post chicken-manure biochar application.Furthermore at the end of soil incubation clear increase in the available phosphorus and potassium with 61.08%and 6.10 times,respectively,was observed in PLA-MP polluted soils;however,a remarkable decline in inorganic nitrogen with 64.31%was observed.Under the synergistic effects of PLA-MPs and biochar,the net total carbon variable was significantly positively correlated with that of in PLA-MPs polluted soils.This study demonstrates that the biochar application slows down the PLA-MPs induced nutrient loss and that the soil total carbon turnover and nitrogen transformations are synergistically affected by biochar and PLA-MPs.

关 键 词：聚乳酸微塑料 生物炭 土壤理化性质 酶活性 酸性土壤 

分 类 号：X53[环境科学与工程—环境工程]