添加生物质炭对大青山油松林土壤温室气体通量的影响  

The Effects of Biochar Addition on Greenhouse Gas Fluxes in Pinus tabuliformis Forest Soils of the Daqing Mountains

作　　者：李顺顺 高健 李长生[3] 马秀枝[1] 姚慧芳 韩磊 冯辉[1] 冯茹 崔昕远 Li Shunshun;Gao Jian;Li Changsheng;Ma Xiuzhi;Yao Huifang;Han Lei;Feng Hui;Feng Ru;Cui Xinyuan(Inner Mongolia Agricultural University,Hohhot 010019,P.R.China;Genheyuan National Wetland Park Administration;Inner Mongolia Meteorological Bureau)

机构地区：[1]内蒙古农业大学,呼和浩特010019 [2]根河源国家湿地公园管理局 [3]内蒙古自治区气象局

出　　处：《东北林业大学学报》2024年第8期120-125,133,共7页Journal of Northeast Forestry University

基　　金：内蒙古自然科学基金项目(2022MS03054)。

摘　　要：为明确添加生物质炭对大青山油松林土壤温室气体排放及土壤理化性质的影响。通过室内培养试验,向人工林地土壤中添加不同比例生物炭,添加比例分别为CK(0)、B1(1%)、B2(3%)、B3(5%)、B4(8%)5个处理,添加量分别为0、5、15、25、40 g。培养48 d,采集不同培养时间(0、0.5、1.0、1.5、2.0、4.0、6.0、8.0、10.0、15.0、20.0、25.0、32.0、40.0、48.0 d)的气体样品,测定温室气体排放量,在培养结束后采集土壤样品。结果表明:在0.5~3.0 d内施加各比例生物质炭均促进土壤CO_(2)排放,从第4.0 d开始,施加各比例生物质炭均对土壤CO_(2)排放起抑制作用。施加各比例生物质炭均显著降低了CO_(2)的累计排放量。施加各比例的生物质炭对土壤CH4排放通量均有抑制作用,其中施加8%生物质炭(B4处理)对CH4排放的抑制作用最明显。随着施入生物质炭比例的增大,土壤对CH4的累计吸收量也显著增加。0~1.5 d,施入生物质炭对大青山油松林土壤N_(2)O排放有促进作用,在3.0~15.0 d时则起抑制作用。1%、3%的生物质炭添加量(B1及B2处理)降低N_(2)O排放量,5%和8%的生物质炭添加量(B3及B4处理)增加N_(2)O排放量。添加生物质炭显著提高大青山油松林土壤pH、全氮、全磷、有机碳、有机质,且生物质炭施加比例越大土壤pH的增加幅度越大。The impact of adding biochar on greenhouse gas emissions and soil physicochemical properties in the Pinus tabulaefor⁃mis forest soil of Daqing Mountain was investigated to clarify its effects.Through indoor incubation experiments,different proportions of biochar were added to the soil in artificial forest land,with treatments including CK(0%),B1(1%),B2(3%),B3(5%),and B4(8%),with added amounts of 0,5,15,25,and 40 g.After 48 days of incubation,gas sam⁃ples were collected at different incubation times(0,0.5,1.0,1.5,2.0,4.0,6.0,8.0,10.0,15.0,20.0,25.0,32.0,40.0,48.0 d)to measure greenhouse gas emissions.Soil samples were collected after the incubation period.The results showed that adding various proportions of biochar promoted soil CO_(2) emissions within 0.5-3.0 days,but from day 4.0 on⁃wards,it inhibited soil CO_(2) emissions.The cumulative CO_(2) emissions were significantly reduced with the addition of bio⁃char.Adding biochar suppressed soil CH4 emission rates,with the highest inhibition observed with 8%biochar addition(B4 treatment).As the proportion of biochar increased,soil’s cumulative absorption of CH4 also significantly increased.Biochar addition promoted the N_(2)O emissions from P.tabulaeformis forest soil in Daqing Mountain within 0-1.5 days but inhibited emissions from 3.0-15.0 days.Addition of 1%and 3%biochar(B1 and B2 treatments)reduced N_(2)O emissions,while 5%and 8%biochar additions(B3 and B4 treatments)increased N_(2)O emissions.Adding biochar significantly in⁃creased the soil pH,total nitrogen,total phosphorus,organic carbon,and organic matter of the P.tabulaeformis forest soil in Daqing Mountain,with a greater increase in pH observed with higher proportions of biochar application.

关 键 词：油松林土壤 生物质炭 温室气体排放 温室气体通量 土壤性质 

分 类 号：S791[农业科学—林木遗传育种]