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时间:2020-05-22
《黑土区不同土地利用方式土壤CO2和N2O通量日变化特征-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第42卷第5期东北林业大学学报Vo1.42No.52014年5月JOURNALOFNORTHEASTFORESTRYUNIVERSITYMay2014黑土区不同土地利用方式土壤CO2和N2O通量日变化特征韩瑛杨小燕陈祥伟崔琳徐兰红(东北林业大学,哈尔滨,150040)摘要以典型黑土区天然次生林、樟子松人工林、草地、耕地土壤为研究对象,采用静态箱一气相色谱法。在连续24h原位气体样品采集的基础上,通过测定、计算与分析,研究了不同土地利用方式对土壤CO,和N,0排放通量日变化规律的影响。结果表明:黑土区4种不同土地利用方式土壤CO
2、,排放通量的日变化幅度为352.7~938.3mg·m~·h~,总体上从08:0O至次日06:00均呈单峰曲线的变化规律,且以天然次生林和樟子松人工林等林地保持相对较高水平,草地次之,耕地最低并显著低于其他3种样地(p3、度的反应更为敏感。关键词黑土;土地利用;CO,;N,O;日变化分类号S151.9+4DiurnalVariationCharaeteristicsofSoiICO,andN,0FluxesEmissionunderDifierentLandUseTypesinTypi.calBlackSoilRegion/HanYing,YangXiaoyan,ChenXiangwei,CuiLin,xuLanhong(NortheastForestryUniversity,Harbin150040。P.R.China)//Journalof4、NortheastForestryUniversity.一2014.42(5).一89~91.114WestudiedthedailyvariationcharacteristicsofsoilN,0andCO,emissionfluxesfromfourlandusetypesincludingnaturalsecondaryforest,Mongolianscotspine(Pinussylvestrisvat.mongolica)plantation.grasslandandfarmlandre—spectivelyin5、typicalblack’soilregionbyusingthemethodofstaticchamber-gaschromatographictechniquesandobservingN,OandCO,emissioncontinuallyfor24hintheoriginallocation.ThedailyemissionfluxesofsoilCO,underfourplotsallshowasingle-peakedcurvewithavariationrangeof352.7—938.3mg·m~·h~from6、08:00amtonext06:O0am.andtheemissionofCO,fromnaturalsecondaryforestandScotspineplantationarehigher.followedbygrasslandandfarm—land,andthefarmlandissignificantlylower(p7、gnificantlyhigherfromfarmlandthanthatfromotherthreeplots(p<0.05).Comparedwithsoilwatercontent.soilCO,andN,Oemissionfluxesarebothcorrelatedmoresignificantlywithsoiltemperature(p<0.05).Therefore.thesoiltemperatureisthemainfactorforsoilCO,andN,Oemissionfluxesintypicalb8、lacksoilregion.KeywordsBlacksoil;Landuse;CO2;N20;Diurnalvariation全球气候变暖是令世人十分关注的环境问题之东北黑土区作为我国重要的商品粮生产基一,温室气体在全球变暖过程中起着极其重要的作地,由于长期不合理的土地利
3、度的反应更为敏感。关键词黑土;土地利用;CO,;N,O;日变化分类号S151.9+4DiurnalVariationCharaeteristicsofSoiICO,andN,0FluxesEmissionunderDifierentLandUseTypesinTypi.calBlackSoilRegion/HanYing,YangXiaoyan,ChenXiangwei,CuiLin,xuLanhong(NortheastForestryUniversity,Harbin150040。P.R.China)//Journalof
4、NortheastForestryUniversity.一2014.42(5).一89~91.114WestudiedthedailyvariationcharacteristicsofsoilN,0andCO,emissionfluxesfromfourlandusetypesincludingnaturalsecondaryforest,Mongolianscotspine(Pinussylvestrisvat.mongolica)plantation.grasslandandfarmlandre—spectivelyin
5、typicalblack’soilregionbyusingthemethodofstaticchamber-gaschromatographictechniquesandobservingN,OandCO,emissioncontinuallyfor24hintheoriginallocation.ThedailyemissionfluxesofsoilCO,underfourplotsallshowasingle-peakedcurvewithavariationrangeof352.7—938.3mg·m~·h~from
6、08:00amtonext06:O0am.andtheemissionofCO,fromnaturalsecondaryforestandScotspineplantationarehigher.followedbygrasslandandfarm—land,andthefarmlandissignificantlylower(p7、gnificantlyhigherfromfarmlandthanthatfromotherthreeplots(p<0.05).Comparedwithsoilwatercontent.soilCO,andN,Oemissionfluxesarebothcorrelatedmoresignificantlywithsoiltemperature(p<0.05).Therefore.thesoiltemperatureisthemainfactorforsoilCO,andN,Oemissionfluxesintypicalb8、lacksoilregion.KeywordsBlacksoil;Landuse;CO2;N20;Diurnalvariation全球气候变暖是令世人十分关注的环境问题之东北黑土区作为我国重要的商品粮生产基一,温室气体在全球变暖过程中起着极其重要的作地,由于长期不合理的土地利
7、gnificantlyhigherfromfarmlandthanthatfromotherthreeplots(p<0.05).Comparedwithsoilwatercontent.soilCO,andN,Oemissionfluxesarebothcorrelatedmoresignificantlywithsoiltemperature(p<0.05).Therefore.thesoiltemperatureisthemainfactorforsoilCO,andN,Oemissionfluxesintypicalb
8、lacksoilregion.KeywordsBlacksoil;Landuse;CO2;N20;Diurnalvariation全球气候变暖是令世人十分关注的环境问题之东北黑土区作为我国重要的商品粮生产基一,温室气体在全球变暖过程中起着极其重要的作地,由于长期不合理的土地利
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