Combining slow-release fertilizer and plastic film mulching reduced the carbon footprint and enhanced maize yield on the Loess Plateau  

作　　者：Xiaoqing Han Pengfei Dang Lechen Liao Fangqi Song Miaomiao Zhang Maoxue Zhang Guoqing Li Shuyue Wen Ning Yang Xiping Pan Xiaofan Wang WenWang Xiaoliang Qin Charles O.Joseph Kadambot H.M.Siddique 

机构地区：[1]College of Agronomy,Key Laboratory of Crop Physi-ecology and Tillage Science in Northwestern Loess Plateau,Northwest A&F University,Yangling,Shaanxi 712100,China [2]Department of Crop Sciences and Beekeeping Technology College of Agricultural Sciences and Food Technology,University of Dar es Salaam,Mwalimu Julius Nyerere Mlimani Campus,P.O.Box 35091,Dar es Salaam,Tanzania [3]College of Life Science,Yulin University,Chongwen Road No.4,Yulin,Shaanxi,719000,China [4]The UWA Institute of Agriculture and School of Agriculture&Environment,The University of Western Australia,Perth WA 6001,Australia

出　　处：《Journal of Environmental Sciences》2025年第1期359-369,共11页环境科学学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(No.32071980);the Key Projects of Shaanxi Agricultural Collaborative Innovation and Extension Alliance(No.LMZD202201);the Key R&D Project in Shaanxi Province(No.2021LLRH-07);Shaanxi Natural Scientific Basic Research Program project(No.2022JQ-157).

摘　　要：Agricultural practices significantly contribute to greenhouse gas(GHG)emissions,necessitating cleaner production technologies to reduce environmental pressure and achieve sustainable maize production.Plastic film mulching is commonly used in the Loess Plateau region.Incorporating slow-release fertilizers as a replacement for urea within this practice can reduce nitrogen losses and enhance crop productivity.Combining these techniques represents a novel agricultural approach in semi-arid areas.However,the impact of this integration on soil carbon storage(SOCS),carbon footprint(CF),and economic benefits has received limited research attention.Therefore,we conducted an eight-year study(2015-2022)in the semi-arid northwestern region to quantify the effects of four treatments[urea supplied without plastic film mulching(CK-U),slow-release fertilizer supplied without plastic film mulching(CK-S),urea supplied with plastic film mulching(PM-U),and slow-release fertilizer supplied with plastic film mulching(PM-S)]on soil fertility,economic and environmental benefits.The results revealed that nitrogen fertilizer was the primary contributor to total GHG emissions(≥71.97%).Compared to other treatments,PM-S increased average grain yield by 12.01%-37.89%,water use efficiency by 9.19%-23.33%,nitrogen accumulation by 27.07%-66.19%,and net return by 6.21%-29.57%.Furthermore,PM-S decreased CF by 12.87%-44.31%and CF per net return by 14.25%-41.16%.After eight years,PM-S increased SOCS(0-40 cm)by 2.46%,while PM-U decreased it by 7.09%.These findings highlight the positive effects of PM-S on surface soil fertility,economic gains,and environmental benefits in spring maize production on the Loess Plateau,underscoring its potential for widespread adoption and application.

关 键 词：Plastic film mulching Slow-release fertilizer Maize grain yield Carbon footprint Economic benefits 

分 类 号：S51[农业科学—作物学]