[1]丁 宁,魏俊奇,孙崤谕,等.高速公路边坡不同地形部位沙打旺种群的生态适应对策研究[J].西北林学院学报,2008,23(03):21-24.
 DI NG Ning,WEI Junqi,SUN Xiaoyu,et al.St udy on the Adaptive Strat eg y of Astrag alusadsurgens Populationat Different Topographical Location of Express way High—margin—slope[J].JOURNAL OF NORTHWEST FORESTRY UNIVERSITY,2008,23(03):21-24.
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高速公路边坡不同地形部位沙打旺种群的生态适应对策研究
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《西北林学院学报》[ISSN:1001-7461/CN:61-1202/S]

卷:
第23卷
期数:
2008年03期
页码:
21-24
栏目:
森林生物、生理、生态、植物、气象等
出版日期:
2008-05-30

文章信息/Info

Title:
St udy on the Adaptive Strat eg  y of Astrag alusadsurgens Populationat Different Topographical Location of Express way High—margin—slope
文章编号:
1001—7461(2008)03—0021—04
作者:
丁 宁1 魏俊奇2 孙崤谕3 景卫清2
1.榆林市地方公路管理处,陕西榆林719000;2.陕西省交通建设集团公司榆靖分公司,陕西榆林719000;3.榆林市公路局,陕西榆林719000
Author(s):
DI NG Ning1WEI Jun—qi 2SUN Xiao—yu3JI NG Wei—qing2
1.Local Hi ghway Administration of Yulin Munici pality,Yulin,Shaanxi 719000,China;2.Yujing Branch of Communication Construction Groups of Shaanxi Province ,Yulin ,Shaanxi 719000,China;3.Hi ghway Administration of Yulin Munici pality,Yulin,Shaanxi 719000,China
关键词:
沙打旺地形部位生长特征生物量分配生态适应对策
Keywords:
Astragalus adsurgens topographi callocation growth characteristic biomass allocation adaptive strategy
分类号:
S728.4
文献标志码:
A
摘要:
以高速公路边坡不同地形部位的沙打旺种群为对象,通过样地调查,分析了不同土壤水分和养分条件下沙打旺种群生长和生态适应对策。结果表明:随着土壤水分和养分储量的增大,茎、花、果的生物量比例增大,根系和叶片的生物量比例下降。在土壤水分和养分储量较大时,种群将更多的生物量分配于茎、花、果,丛内分枝数量多且个体高大,有利于种群对已占据生境的巩固和利用,提高了种群的适合度;在土壤水分和养分储量较小时,种群将更多的生物量分配于根系和叶片,丛内分枝数量少且个体矮小,降低了种内竞争,扩大了种群对环境资源的获取和利用范围。
Abstract:
Adapti ve strategy and gro wt h of Astragalus adsurgens populati on at different topographi cal free—way slopes wit h different water and nutri ent conditi ons were st udi ed .The res ults s ho wed t hat wit h t he i n—crease of s oil moi st ure and nutri ents ,t he bi o mass allocati on of t he plant populati ont to ste m,flo wer and
fruit i ncreased ,and decreased to t he root s yste m and leaves to cons oli date and effi ci ently use t hei r habitats t hat t hey had occupi es d ,and to pro mote t hei r adaptability ,feat uri ng as produci ng more tiller and larger i n—di vi dual .U nder t he lo wer levels of s oil moi st ure and nutri ent reserves ,t he populati on allocates more bi o—mass to root and leaves and produce fe wer tiller and s maller i ndi vi dual ,to be benefi ci al to t he populati on to reduce i ntra—s pecifi c co mpetiti on and enlargi ng t he scope of res ources obtai ni ng .

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备注/Memo

备注/Memo:
收稿日期:2007—09—20 修回日期:2007—11—13 作者简介:丁宁(1974—),男,陕西榆林人,工程师,研究方向为公路生态环境治理。
更新日期/Last Update: