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时间:2019-07-09
《杉木、火力楠纯林及其混交林生态系统C、N贮量》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、维普资讯http://www.cqvip.com第25卷第12期生态学报Vo1.25,No.122005年l2月ACTAECOLOGICASINICADec.,2005杉木、火力楠纯林及其混交林生态系统C、N贮量黄宇,冯宗炜,汪思龙,冯兆忠。,张红星。,徐永荣。(1.湖南农业大学生态研究所,长沙410128;2.湖南省科技厅,长沙410001;3.中国科学院生态环境研究中心,北京100085;4.中国科学院会同森林生态实验站,湖南会同418307)摘要:研究比较第2代连载杉木纯林、杉木与火力楠混交林以及火力楠纯林3种人工林生态系统的C、N贮量。结果表明
2、,杉木与火力楠混交林生态系统C贮量要高于杉木纯林和火力楠纯林,而生态系统N贮量是火力楠纯林和杉木与火力楠混交林高于杉木纯林;生态系统c和N贮量的空间分布基本一致,土壤层占主要部分,其次为乔木层,再次是根系,林下植被层和凋落层所占比例最小;相关分析表明,土壤c、N贮量分别和林下植被生物量以及与森林凋落物现存量之间都具有良好的线性关系,说明林下植被和森林凋落物对土壤C、N贮量有着深刻的影响。关键词:杉木人工林;混交林;碳贮量;氮贮量文章编号:1000—0933(2005)12-3146—09中图分类号:Q948.1文献标识码:ACandNstocksund
3、erthreeplantationforestecosystemsofChinese—fir,MicheliamacclureiandtheirmixtureHUANGYu~,FENGZong—We,WANGSi—Long,FENGZhao—Zhong。,ZHANGHong—Xing。,XUYong—Rong。(1.R口rchInstit“tEc0l0gY,H’dAgric“It“r口lUiversity,Chagsha,Hd410128,China;2.ScienceandTechnologyDepartmentofHunanProvince,Cha
4、ngsha410001,China;3.DepartmentofSystemsEcology,ResearchCenterforEco—EnvironmentalSciences,ChineseAcademyofSciences,Beijing100085,China;4.HuitongExperimentalStationofForestEcology,ChineseAcademyofSciences,Hu’nanProvince,418307,China).ActaEcologicaSinica,2005.25(12):3146~3154、Abst
5、ract:Chinesefir(Cgnrnlanceolata),atypeofsubtropicalfast—growingconifertree,widelydistributedinSouthChina,anditsplantationareainChinaismorethan7×10hm,accountingfor24oftotalareaofplantationforestinChina.Inrecentdecades,thesystemofsuccessiveplantationofChinesefiriswidelyusedintheso
6、uthernchinaforananticipatedhigheconomicreturn.However,recentstudieshavedocumentedthatthepracticeofthissystemledtodramaticdecreasesinsoilfertilityandforestenvironmentaswellasinproductivity.Someforestecologistsandmanagersrecognizetheecologicalroleperformedbybroadleaftreesgrowingin
7、mixtureswithconifers,andagreatdealofstudiesonmixtureseffectshavebeenconducted,particularlyonmixturespeciesoftemperateandborealforest,buttheseresearchresultswerenotcompletelyconsistent.Maybethemixtureseffectsdependinlargepartonspecificsiteconditions,theinteractionsamongspeciesinm
8、ixturesandbiologicalcharacteristicsofspecies,et
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