草原与草坪2025，Vol.45Issue(5)：49-55,7.DOI:10.13817/j.cnki.cyycp.2025.05.005
冬季不同草类植物的温室气体释放特征研究
Research on greenhouse gas release characteristics of different lawn plants in winter
摘要
Abstract
[Objective]It is of great significance to study the greenhouse gas emission characteristics of different lawn plants in winter for objectively understanding the role of lawn in reducing the emission carbon dioxide(CO2),methane(CH4)and nitrous oxide(N2O)The study is helpfulin optimizing the selection of lawn plants and promoting the reduction of sources and increase of sinks.[Method]The LI COR-7810/7820 greenhouse gas flux detection system was used to monitor the greenhouse gas flux of common lawn plants such as bermuda grass,cogongrass and clover in winter.The monitored greenhouse gas fluxes included carbon dioxide(CO2),methane(CH4),and nitrous oxide(N2O),and their impact on global warming was evaluated.[Result]1)The daily average CO2 release rates of bermuda grass,cogongrass,and clover in winter were 791.8 nmol/(m2·s),1 569.5 nmol/(m2·s)and 5 772.7 nmol/(m2·s),respectively.The average daily release rates of CH4 were-0.108 nmol/(m2·s),-0.113 nmol/(m2·s)and 0.158 nmol/(m2·s),respectively.The average daily release rates of N2O were-0.218 nmol/(m2·s),-0.005 nmol/(m2·s)and 0.003 nmol/(m2·s),respectively.2)The average daily release rates of CO2 and N2O generally showed the characteristic of being higher at noon and lower in the morning and evening.The daily average release rate of CH4 showed a characteristic of beinglowedat noon and beinghigherinthe morning and evening.3)The daily av-erage global warming potential caused by bermuda grass,cogongrass and clover in winter were 730.9 nmol/(m2·s),1 564.9 nmol/(m2·s)and 5 777.9 nmol/(m2·s),respectively.their contributions to the global warming potential were lower than those of bare land[6 507.3 nmol/(m2·s)].[Conclusion]Compared to bare land,bermuda grass,co-gongrass and clover all exhibit carbon sources in winter.Planting the above-mentioned plants can help alleviate greenhouse gas emissions from the soil,with bermuda grass having the most significant emission reduction effect.From the point of view of reducing resources and increasing sinks,it is suggested that bermuda grass should be pre-ferred in the selection of lawn plants.关键词
碳排放/全球增温潜势/草类植物/冬季/温室气体/狗牙根Key words
carbon emissions/global warming potential/lawn plants/winter/greenhouse gases/Cynodon dacty-lon分类
农业科技引用本文复制引用
PENG Juan,WU Xin-tong,YAN Feng..冬季不同草类植物的温室气体释放特征研究[J].草原与草坪,2025,45(5):49-55,7.基金项目
湖南省重大水利科技项目:湖南水利在"双碳"行动中的响应及碳汇评价体系研究(XSKJ2022068-35) （XSKJ2022068-35）
