摘要
本研究以CO_(2)、CH_(4)、N_(2)O标准混合气体和12 mL真空玻璃样品瓶等为试验材料,探讨了气体样品瓶的保存天数(1~180 d)、保存温度(室温条件为10~25℃,冷冻条件为-18℃)和密封垫使用次数(2、10、20、30、40、50、60次)对温室气体浓度变化的影响。研究结果表明:与保存1 d内的气体样品相比,CO_(2)、CH_(4)和N_(2)O浓度在保存天数分别为60、120、90 d时降低了1.5%、0.5%和2.0%。保存天数和保存温度对CO_(2)、CH_(4)和N_(2)O浓度的影响均存在交互作用,3种气体在冷冻条件下的保存天数分别为30、90、150 d,分别较室温条件下延长了10、30、130 d。因此,为确保温室气体检测结果的准确性,田间温室气体样品如不能及时检测,建议在冷冻条件下保存。此外,密封垫的使用次数对CH_(4)和N_(2)O浓度均没有影响,但却影响CO_(2)浓度。冷冻保存条件下,当密封垫使用2次、10~50次和60次时,建议分别在120~150 d、60~90 d和30~60 d内完成检测。
In this study,CO_(2),CH_(4)and N_(2)O standard gases mixtures and 12 mL vacuum flask was used as experiment materials,to study the influences of cap use frequencies(2,10,20,30,40,50,60 times),storage temperatures(room temperature at 10-25℃,freezing at-18℃)and storage days(1-180 days)on the change of greenhouse gases(GHGs)concentration.The results showed that,compared with the gas samples stored for 1 day,the concentrations of CO_(2),CH_(4)and N_(2)O decreased by 1.5%,0.5%and 2.0%when the store 60,120,90 days,respectively.The effects of storage days and storage temperature on the concentrations of CO_(2),CH_(4)and N_(2)O were interactive.The storage days of the three gases under freezing conditions were 30,90,150 days,respectively,which were 10,30,130 days longer than that under room temperature.Therefore,field GHG samples that cannot be detected in time are recom⁃mended to be stored under freezing conditions for the accuracy of GHGs detection results.In addition,the cap use frequency had no effects on the concentration of CH_(4)and N_(2)O,but it did affect the concentration of CO_(2).At freezing temperature,GHGs should be tested within 20-150 days,60-90 days and 30-60 days,when the cap was used twice,10-50 times and 60 times.
作者
王婧瑜
刘志铭
曹玉军
吕艳杰
魏雯雯
吴兴宏
王永军
姚凡云
WANG Jingyu;LIU Zhiming;CAO Yujun;LYU Yanjie;WEI Wenwen;WU Xinghong;WANG Yongjun;YAO Fanyun(Jilin Academy of Agricultural Sciences,Changchun 130033;Faculty of Agronomy,Jilin Agricultural University,Changchun 130118,China)
出处
《东北农业科学》
2022年第4期113-117,共5页
Journal of Northeast Agricultural Sciences
基金
国家重点研发计划项目(2017YFD0300303)
吉林省科技发展计划项目(20200702011NC)。
