草地学报

›› 2011, Vol. 19 ›› Issue (2): 231-236.DOI: 10.11733/j.issn.1007-0435.2011.02.009

• 研究论文 • 上一篇    下一篇

人工草地建植过程中青海扁茎早熟禾根系变化特征

伍磊1,2, 周青平1,2, 刘文辉1, 颜红波1, 雷生春1, 梁国玲1, 贾志峰1   

  1. 1. 青海省畜牧兽医科学院, 青海, 西宁, 810016;
    2. 青海大学, 青海, 西宁, 810013
  • 收稿日期:2010-12-30 修回日期:2011-03-02 出版日期:2011-04-15 发布日期:2011-04-15
  • 通讯作者: 周青平,E-mail:qpingzh@yahoo.com.cn
  • 作者简介:伍磊(1985- ),男,湖南澧县人,硕士研究生,研究方向为牧草栽培育种,E-mail:dl_wlei@126.com
  • 基金资助:
    “现代农业产业技术体系建设专项资金资助”;公益性行业专项“青海牧区优质高效饲草生产利用技术研究与示范”(201003023);农业部“青藏高原牧草种质资源保护利用”(070401)资助

Variation of Root System of Poa pratensis var.anceps Gaud.cv.Qinghai during Pasture Establishment

WU Lei1,2, ZHOU Qing-ping1,2, LIU Wen-hui1, YAN Hong-bo1, LEI Sheng-chun LIANG Guo-lin1, JIA Zhi-feng1   

  1. 1. Qinghai Academy of Animal Husbandry and Veterinary Sciences, Xining, Qinghai Province 810016, China;
    2. Qinghai University Xining, Qinghai Province 810013, China
  • Received:2010-12-30 Revised:2011-03-02 Online:2011-04-15 Published:2011-04-15

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摘要： 通过研究青海扁茎早熟禾(Poa pratensis var.anceps Gaud.cv.Qinghai)地下生物量6年来的时空变化特征,揭示根茎植物种内竞争,并为青海扁茎早熟禾在物种适应特征、维护生态系统平衡等方面提供基础数据。结果表明:青海扁茎早熟禾的地下生物量垂直分布为"T"型,以0~5 cm层地下生物量最高,地下生物量主要集中在0~20 cm。地下生物量在第2年为单峰季节变化,毛根地下生物量、根茎地下生物量、根颈地下生物量和总地下生物量均以第2年增长最快,第4年达到最大值之后略有降低。根系变化可分为4个时期:第1年为调整期,第2年和第3年为对数期,第4年和第5年均为稳定期,第6年之后为衰亡期。第4年的根生物量、根密度、根比面积和根比表面积均大于第6年,说明第6年根系已经有逐渐衰老的趋势。地下生物量时序变化最符合S曲线模型,其表达式为:y=e7.355-1.939/t;地下生物量垂直变化最符合逆变换曲线,表达式为:y=-92.167+2773/x。

关键词: 青海扁茎早熟禾, 根系, 时空分布, 种群, 发展策略

Abstract: This study investigates an underground biomass variation of Poa pratensis var.anceps Gaud.cv.Qinghai over a six-year period.Further,it reveals intraspecies competition characteristics of rhizome plants and provides basic data for both species adaptation and an ecological balance system maintaining.Results showed the highest underground biomass in 0～5 cm,but concentrated in 0～20 cm.Vertical distribution of underground biomass appeared as "T" shape.Seasonal variation of underground biomass in two years showed a single-peak.Underground biomass increased most quickly during the first two years,peaked in four years,then declined.The first year presented a phase of adjustment while the second and third years showed logarithmic period.The fourth and fifth years exhibit a stationary phase,followed by a decline after six years.Root density,root area and root specific surface area of four years were higher than that of six years.The model of underground biomass is y=e7.355-1.939/t.

Key words: Poa pratensis var.anceps Gaud.cv.Qinghai, Root System, Spatial and temporal distribution, Population, Develop strategy

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