摘要
为研究生物炭对温室气体排放影响的时间效应,以黄淮海平原土壤为研究对象,设置每年分别施用0.00(CK)、2.25(C1)、4.50(C2)、9.00(C3)、13.50 t·hm^(-2)(C4)生物炭和仅一次性施用13.50 t·hm^(-2)生物炭处理(CS),研究3年后黄淮海平原小麦-玉米轮作农田生态系统土壤温室气体排放及土壤理化性质的差异。结果表明,CS处理可以显著抑制土壤CO_(2)排放量,在小麦季和玉米季分别较CK显著降低38.5%和25.75%;C2、C3和C4生物炭处理仅在玉米季显著抑制土壤CO_(2)排放,较CK降低17.7%~24.6%。生物炭对土壤CH_4排放无显著性影响。生物炭处理均可以显著抑制土壤N_(2)O排放,在小麦季和玉米季分别较CK显著降低37.5%~60.1%和24.9%~39.3%。CS处理显著降低了综合增温潜势,较CK降低30.4%,表明一次性施用大量生物炭对温室气体排放的抑制效果更佳。相关分析表明,土壤CO_(2)排放通量与土壤温度、湿度、NH_(4)^(+)-N和NO_(3)^(-)-N呈极显著的正相关关系;土壤CH_4排放通量与土壤温度、NH_(4)^(+)-N、NO_(3)^(-)-N呈极显著的负相关关系,与土壤湿度呈显著的负相关关系;土壤N_(2)O排放通量与土壤温度、湿度、NH_(4)^(+)-N和NO_(3)^(-)-N呈极显著的正相关关系。综上所述,生物炭对土壤温室气体排放具有抑制作用,在本试验条件下,一次性施用13.5 t·hm^(-2)生物炭可达到环境效益最大化。
To study the temporal effect of biochar on greenhouse gas emissions,the soil of the Huang-Huai-Hai plain was as the research object.The amount of biochar was added with 0.00(CK),2.25(C1),4.50(C2),9.00(C3),13.50 t·hm^(-2)(C4)per year and 13.50 t·hm^(-2)(CS)at one time for 3 years.The differences in soil greenhouse gases and soil physicochemical properties of the wheat‑maize rotation farmland ecosystem in the Huang-Huai-Hai plain were studied.The results showed that CS treatment could significantly suppress CO_(2) emission of soil,with the decrease of 38.5%and 25.75%in wheat and corn seasons,respectively.The C2,C3 and C4 treatments significantly suppressed CO_(2) emission of soil by 17.7%~24.6%in the maize season.Biochar had no significant effect on CH_(4) emission of soil.The application of biochar could significantly inhibit N_(2)O emission of soil,reaching 37.5%~60.1%and 24.9%~39.3%in wheat and maize seasons,respectively.Only CS treatment significantly reduced the comprehensive warming potential by 30.4%,which indicated that the one-time application of a large amount of biochar had a better inhibitory effect on greenhouse gases.Correlation analysis showed that soil CO_(2) emission flux was significantly positively correlated with soil temperature,moisture,NH_(4)^(+)-N and NO_(3)^(-)-N.Soil CH_(4) emission flux was negatively correlated with soil temperature,moisture,NH_(4)^(+)-N and NO_(3)^(-)-N.Soil N_(2)O emission flux was positively correlated with soil temperature,moisture,NH_(4)^(+)-N and NO_(3)^(-)-N.In summary,biochar could inhibit soil greenhouse gas emissions.Under the conditions of this experiment,a one-time application of 13.5 t·hm^(-2) of biochar could maximize environmental benefits.
作者
刘宏元
周志花
赵光昕
沈钦瑞
LIU Hongyuan;ZHOU Zhihua;ZHAO Guangxin;SHEN Qinrui(Institute of Wetland Agriculture and Ecology,Shandong Academy of Agricultural Sciences,Jinan 250100,China;Inner Mongolia Meteorological Observatory,Hohhot 010051,China;Tianjin College,University of Science and Technology Beijing,Tianjin 301830,China;Cao County Plant Quarantine Station of Heze City Shandong Province,Shandong Heze 274400,China)
出处
《中国农业科技导报》
CAS
CSCD
北大核心
2023年第7期178-186,共9页
Journal of Agricultural Science and Technology
基金
山东省重点研发计划项目(2020CXGC010804)
山东省农业科学院农业科技创新工程项目(CXGC2023B01)。
关键词
土壤理化性质
综合增温潜势
生物炭
时间限制效应
physical and chemical properties of soil
global warming potential
biochar
time-dependent
