自然资源学报

自然资源学报 ›› 2003, Vol. 18 ›› Issue (5): 544-551.doi: 10.11849/zrzyxb.2003.05.005

• 资源生态 • 上一篇    下一篇

退化羊草草原在浅耕翻处理后植物群落生物量组成动态研究

宝音陶格涛, 刘美玲   

  1. 内蒙古大学生态与环境科学系, 内蒙古呼和浩特 010021
  • 收稿日期:2003-03-04 修回日期:2003-06-26 出版日期:2003-10-25 发布日期:2003-10-25
  • 作者简介:宝音陶格涛(1961～),男(蒙古族),教授,硕士生导师,从事草地生态学的研究工作,发表学术论文40 余篇.E-mail:bytgt@sohu.com
  • 基金资助:

    国家重点基础研究发展规划项目(G2000018604);中国科学院知识创新重大项目(KSCX1-08);科技部防沙应急技术研究项目(FS2000-06)资助.

The study on biomass composition dynamics of community in degenerated steppe of Leymus chinensis after shallow ploughing

BAOYIN Taogetao, LIU Mei-ling   

  1. Department of Ecological and Environmental Science, Inner Mongolia Uneversity, Huhhot 010021, China
  • Received:2003-03-04 Revised:2003-06-26 Online:2003-10-25 Published:2003-10-25

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被引次数

56

摘要： 利用统计方法研究了退化羊草草原浅耕翻后17年的群落生物量组成变化规律,结果表明:浅耕翻处理后地上生物量增长与恢复年限呈单峰型曲线,且在演替的前期和中期,群落生产力与降水并没有显著的相关关系,生物量的高低主要受群落组成结构的影响。群落地上生物量组成中禾本科占主导地位,藜科、菊科和蔷薇科在恢复前期和中后期比例增加,且与禾本科有一定的负相关关系。从生活型组成来看,根茎禾草生物量占总生物量的90%以上,群落初级生产力及其年度动态与多年生根茎禾草和多年生杂类草2个功能群的地上生物量均有极显著的相关关系。就群落生物量植物水分生态类型组成来看,中旱生、旱生植物占有绝对的优势,群落地上生物量与中旱生植物、旱生植物功能群地上生物量也具有较显著的正相关关系。多样性指数在处理后的总变化趋势为开口向上的抛物线状。植物群落多样性变化主要归功于其物种的均匀性变化。同时禾本科、菊科、蔷薇科植物生物量,根茎禾草、丛生禾草、直根型杂类草的生物量与多样性指数呈显著或极显著的线性相关关系。浅耕翻对更新退化羊草草原、提高产草量、改善草质均有明显效果,从利用的角度看,浅耕翻处理后第四年即根茎禾草占优势以后可有计划地利用。

关键词: 退化羊草草原, 浅耕翻, 生产力动态, 功能群组成

Abstract: Grassland is a kind of important resources.With the increase in population and the over-grazing,the grassland all over the world had been degenerated.In order to find a feasible method to recover the degenerated grassland,we used the method of shallow ploughing to study the biomass composition dynamics of community in Degenerated Steppe of Leymus chinensis.Many statistical methods were used to study the changing laws of biomass composition of degenerated steppe of Leymus chinensis17years after shallow ploughing.The results showed that the increase in over-ground biomass have a singlet regression with recovering years after shallow ploughing.The biomass was affected more by the composition of community than precipitation during the prophase and metaphase of succession.The biomass proportion of Gramineae was dominant in all families,but during prophase and meta -anaphase of recovering the biomass proportions of Chenopodiacae,Compositae and Rosaceae raised,and they all had negative correlations with Gramineae.As far as biomass of different life forms was concerned,the biomass of rhizome grass was more than90%of the total productivity.The primary productivity and the changing laws between years of community had correlation with the over -ground biomass of perennial rhizome grass and perennial forbs prominently.From the biomass of community in different water ecological types,the biomass of xerophilous plant was dominant of all.Over -ground total productivity of community had obviously positive correlation with the over-ground biomass of xerophilous plant.The index of diversity of community appeared an open-up parabola after shallow ploughing.The biomass of Gramineae,Compositae,Rosaceae,rhizome grass,bunch grass and taproot forbs had obviously linear correlation with the index of diversity of community.So it could be seen that the method of shallow ploughing could improve the productivity and quality of grassland.

Key words: degenerated steppe of L.chinensis, shallow ploughing, productivity dynamics, functional group composition

中图分类号: 

  • Q948.154