微塑料对土壤CO_(2)排放的累积效应  

Cumulative Effects of Microplastics on Soil CO_(2) Emissions

作　　者：田智 罗学刚[1,2] 张宇 TIAN Zhi;LUO Xue-gang;ZHANG Yu(School of Life Science and Engineering,Southwest University of Science and Technology,Mianyang,Sichuan 621010;Southwest University of Science and Technology,Ministry of Education Engineering Research Center for Material Materials,Mianyang,Sichuan 621000)

机构地区：[1]西南科技大学生命科学与工程学院,四川绵阳621010 [2]西南科技大学生物质材料教育部工程研究中心,四川绵阳621000

出　　处：《安徽农业科学》2024年第20期74-78,81,共6页Journal of Anhui Agricultural Sciences

基　　金：四川省科技计划重点研究项目(2021YFN0025)。

摘　　要：以控制性栽植体——大型根窖试验装置(以下简称根窖)为研究平台,通过连续3年、每年2茬农作物的种植,解析微塑料处理下不同类型土壤呼吸的变化特征;采用多元回归方程在微塑料积累量、分子量等不同条件下对土壤CO_(2)浓度随时间变化过程进行建模,并进行可视化呈现。结果表明,回归模型能够很好地描述土壤CO_(2)浓度变化规律,各模型R^(2)皆在0.75以上,模拟效果良好。对处理前后2组数据进行显著性方差分析得P值为0.0073,与对照组CO_(2)浓度上升速率(ω=0.728)相比,微塑料使土壤的CO_(2)浓度上升速率显著提高(ω=0.762)。微塑料的加入改变了土壤微气候环境,显著促进了土壤CO_(2)排放。Using the controlled planting body—large-scale root chamber experimental device(hereinafter referred to as root chamber)as the research platform,the characteristics of soil respiration changes under different types of microplastic treatment were analyzed by continuously planting two crops each year for three years.A multiple regression equation was employed to model the temporal variations in soil CO_(2) concentration under varying conditions,including microplastic accumulation and molecular weight,with the results visually presented.The result showed that the regression models effectively described the patterns of soil CO_(2) concentration changes,with all models showing R^(2) exceeding 0.75,indicating good simulation performance.A significant analysis of variance on the pre-and post-treatment data yielded a P-value of 0.0073.Compared to the control group’s CO_(2) concentration increase rate(ω=0.728),the presence of microplastics significantly enhanced the soil CO_(2) concentration increase rate(ω=0.762).The introduction of microplastics altered the microclimate of the soil environment,significantly promoting CO_(2) emissions from the soil.

关 键 词：微塑料 土壤CO_(2)排放 累积效应 多元回归 

分 类 号：S316[农业科学—作物栽培与耕作技术]