| 荒漠河谷胡杨残林复壮更新试验研究 |
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| 引用本文： | 田永祯,司建华,程业森,赵菊英,白莹.荒漠河谷胡杨残林复壮更新试验研究[J].干旱区资源与环境,2009(9). |
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| 作者姓名： | 田永祯 司建华 程业森 赵菊英 白莹 |
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| 作者单位： | 阿拉善盟林业治沙研究所;中国科学院寒区旱区环境与工程研究所; |
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| 基金项目： | 国家科技支撑计划(2006BAD26B01);;国家自然基金项目(40501012)共同资助 |
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| 摘 要： | 胡杨(Populus euphratica)在额济纳荒漠绿洲中的生态地位极其重要,与绿洲的兴衰息息相关。额济纳荒漠绿洲的胡杨林,目前由于河水泛滥受控制,使依赖于河漫滩而发芽生长的幼林所占林地面积比例下降,林地日趋老化、衰残,致胡杨日渐衰败,绿洲退缩。文中依据多年的试验调查数据,对荒漠河岸林胡杨残林复壮更新效果进行了分析研究。结果表明:围栏封育对加快荒漠河岸林的复壮更新和林下天然植被的恢复,起到了积极而显著的作用。开沟断根,打破了土壤表皮板结层,疏松了土壤,利于根蘖苗萌生,同时也促进了苗木侧根和须根的增加,扩大了根系吸收面积,使苗木生长量提高。间苗定株有效地促进了胡杨老树的根蘖更新。确定了河岸胡杨更新林合理密度为幼龄期为3330株/hm2,中龄期为1665株/hm2,近熟林期为600株/hm2,成熟林期为135株/hm2。在此基础上提出了全面保护好沿河现有胡杨残林的措施,实行分片、分段围栏封育和充分引用季节性河道来水浇灌的前提下,积极促进胡杨残林的复壮和根蘖更新,复壮更新。
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| 关 键 词： | 胡杨 围栏封育 开沟断根 间苗定株 复壮更新 |
Experimental study on rejuvenation and regeneration of residual Populus euphratica forest in desert valley |
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| TIAN Yongzhen,SI Jianhua,CHEN Yesen,ZHAO Juying,Baiying.Experimental study on rejuvenation and regeneration of residual Populus euphratica forest in desert valley[J].Journal of Arid Land Resources and Environment,2009(9). |
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| Authors: | TIAN Yongzhen SI Jianhua CHEN Yesen ZHAO Juying Baiying |
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| Institution: | 1.Research Institute of Forestry;Alxa League of Inner Mongolia Autonomous Region;Bayanhot 750306;P.R.China;2.Cold and Arid Regions Environmental and Engineering Research Institute;CAS;Lanzhou 730000;P.R.China |
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| Abstract: | The ecological status of Populus euphratica in Ejina desert oasis is of vital importance,which is closely related to the rise and decline of the oasis.In the present,young stand growing in flood plain is aging and becoming residual due to the control of the overflow of river so that the Populus euphratica in Ejina desert oasis is decaying and the oasis is retreating.This paper the effects rejuvenation and renewal in residual P.euphratica forestry in desert oasis were analyzed and researched in terms of on-t... |
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| Keywords: | Populus euphratica fencing way ditching and root cutting thinning and field planting rejuvenation and regeneration |
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