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时间:2020-04-12
《大兴安岭低质林生态改造后枯落物水文效应变化.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43卷第6期东北林业大学学报Vo1.43No.62015年6月JOURNALOFNORTHEASTFORESTRYUNIVERSITYJun.2015大兴安岭低质林生态改造后枯落物水文效应变化)陈百灵董希斌崔莉唐国华(东北林业大学,哈尔滨,150040)摘要试验样地设置在大兴安岭地区翠峰林场174林班,对大兴安岭白桦低质林枯落物未分解层及半分解层蓄积量、自然持水率、最大持水率、最大持水量、有效拦蓄量5个指标进行连续4a的观测.研究发现带状生态改造对枯落物的蓄积量、最大持水量、有效拦蓄量及自然持水率影响属于中度变
2、异。对枯落物未分解层最大持水率属于高度变异,而对其半分解层最大持水率属于中度变异。带状生态改造对低质林枯落物的影响较为适中林窗生态改造对枯落物的蓄积量、最大持水量影响属于高度变异,对自然持水量、有效拦蓄量的影响属于中度变异.对枯落物未分解层最大持水率影响属于高度变异,而对枯落物半分解层最大持水率影响属于中度变异。经过4a带状及林窗生态改造后,生态改造带宽度6m的样地,其枯落物蓄积量最大,水土保持能力最佳;生态改造带宽度14in的样地.枯落物有效拦蓄量最大,水源涵养功能最佳关键词低质林生态改造:枯落物水文效应:大兴
3、安岭分类号$715.3ChangesofLitterHydrologicalCapacityinLow-qualityForestinDaxing’anMountainsafterEcologicalReforma—tion//ChenBailing,DongXibin,CuiLi,TangGuohua(NortheastForestryUniversity,Harbin150040.P.R.China)//JournalofNortheastForestryUniversity,2015,43(6):72—77
4、.88.Wetook174blocksfromCuifengForestBureauinDaxing’anMountainstoobservethetotalstorage.naturalwatercapacity,maximumwatercapacity.maximumwatercontentrate,effectiveretainrateofthewhitebirchlow—qualityinbothundecomposedlitterandhalf-decomposedlitterinsuccessivef
5、ouryears.Thebelt—ecologicalreformationhadmoderateefectsonthetotalstorage,naturalwatercapacity.maximumwatercapacity,andeffectiveretainrate.Whilethebelt—eco—logicalreformationaffectedthemaximumwatercontentrateofundecomposedlitterhighly,itaffectedthehalf-decompo
6、sedmoderately.Theinfluenceofbelt.ecologicalrefonnationismiddling.Bywindow.ecologicalrefomaation.thetotalstorageandmaximumwatercapacitywasstronglyaffected。meanwhile。effectiveretainrateandnaturalwatercapacitywasmoder—atelyvaried.Themaximumwatercontentrateandthe
7、undeeomposedlevelchangedsignificantly.whilethehalf-decom—posedvariedmiddling.Afterfouryears’reformation.theplotwith6一mwidthhadthelargesttotalstorage.anditcouldholdthesoilandwaterbest.Theeffectiveretainratefortheplotwith14一mwidthwasthebiggest,anditswater—eonse
8、rva—tionisbest.KeywordsLow—qualityforestreformation:Litterhydrologicalcapacity;Daxing’anMountains随着我国经济的发展和生态保护意识的增强,对于此改造势在必行_8]。嫩江发源于大兴安岭伊以经济为主的林业发展方式逐渐被调整为具有水土勒呼里山。甘河作为嫩江的较大支流之一,发源于大保持
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