封山育林对杂谷脑河干旱河谷区植被恢复的影响

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1、第35卷第3期四川林业科技Vo1．35，No．32014年6月JournalofSichuanForestryScienceandTechnologyJun．，2014封山育林对杂谷脑河干旱河谷区植被恢复的影响12133周晓波，陈泓，卿刚，郑绍伟，谢天资，3443*邓竣尹，杨旭煜，杨坤林，慕长龙(1．理县林业局，四川理县623100;2．重庆市渝北区玉峰山林场，重庆401120;3．四川省林业科学研究院，四川成都610081;4．四川省野生动物资源调查保护管理站，四川成都610081)摘要:本文通过对干旱河谷封山育林

2、区域与未封山育林区造林苗木生长状况和灌草群落特征对比，开展封山育林对干旱河谷区植被恢复成效研究。研究结果表明:在相同坡向和海拔梯度上，封山育林区造林苗木平均保存率和树高净生长量均极显著性高于未封山育林区，其差值变化幅度分别为21%(阴坡Ⅰ)～31%(阴坡Ⅲ)和42.7%(阳坡Ⅰ)～59.7%(阳坡Ⅱ);灌草平均盖度和高也表现为封山育林区高于未封山育林区，灌木和草本平均盖度差值变化幅度1.1%(阳坡Ⅰ)～26.7%(阳坡Ⅱ)和2.2%(阳坡Ⅰ)～18.5%(阳坡Ⅱ)之间;灌木和草本平均高度差值变化幅度8.2%(阳坡Ⅰ)

3、～53.5%(阴坡Ⅲ)之间和17.9%(阴坡Ⅲ)～28.9%(阴坡Ⅱ)之间。关键词:封山育林;干旱河谷;植被恢复生物多样性中图分类号:S718文献标识码:A文章编号:1003－5508(2014)03－0032－04EffectofClosedForestonVegetationＲestorationinAridValleysoftheZagunaoＲiver12133ZHOUXiao-boCHENHongQINGGangZHENGShao-weiXIETian-zi3443DENGJun-yinYANGXu-yuY

4、ANGKun-linMUChang-long(1．ForestryBureauofLixian，Lixian623100，China;2．ForestryStationofYufengMountain，Chongqing401120，China;3．SichuanAcademyofforestry，Chengdu610081，China;4．InvestigationofSichuanProvincetheProtectionandManagementofWildAnimalＲesourcesStation，Chen

5、gdu610081，China)Abstract:Basedonthecontrastbetweenafforestationseedlinggrowthandshrubcommunitycharacteris-ticsinaridvalleysofclosedforestareaandthenon-closedforestarea，researcheswereconductedontheeffectofclosingforestonaridvegetationrestoration．Theresultsshowed

6、thatonthesameslopeandeleva-tiongradient，theafforestationseedlingssurvivalrateandaveragetreegrowthinclosedforestareaweresignificantlyhigherthanthoseinnon-closedforestarea，thedifferencebetweenthechangeextentwasre-spectively21%(NorthSlopeⅠ)～31%(NorthSlopeIII)and42

7、.7%(SouthSlopeⅠ)to59.7%(SouthSlopeⅡ);theshrubcoverageandheightintheclosedforestareawerehigherthanthoseinnonclosedforestforest．Thedifferencebetweenaveragecoveragerangeofshrubandherbwas1.1%(SouthSlopeⅠ)～26.7%(SouthSlopeⅡ)and2．2%(SouthSlopeⅠ)～18.5%(SouthSlopeⅡ)bet

8、weenshrubsandherb;thedifferenceofaverageheightwasbetween8.2%((SouthSlopeⅠ)～53.5%(NorthSlopeIII))and17.9%(NorthSlopeIII)～28.9%(NorthSlopeⅡ)．收稿日期:2014-04-04基金项目:科技厅基础研究项目(JB20