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割草对典型草原植物营养元素贮量及分配的影响I.植物生物量的贮量及分配 被引量:9

INFLUENCE OF MOWING ON STORING AMOUNT AND DISTRIBUTION OF NUTRIENT ELEMENTS IN TYPICAL STEPPE 1.STORING AMOUNT AND DISTRIBUTION OF BIOMASS
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摘要 本文研究了内蒙古典型草原地区羊草(Leymuschinensis)、艹洽草(Koeleriacristata)、其它草种和群落生物量的贮量及分配。结果表明:刈割对它们产生不同程度地影响。其产量高峰在8月30日,此时割草地的上述植物生物贮量依次为59.92g.m-2、7.32g.m-2、121.32g.m-2和188.35g.m-2,在割取的部分中所占的比例分别为57.03%、21.58%、49.81%和51.06%。对照区(不割草)依次为105.13g.m-2、8.10g.m-2、97.06g.m-2和210.39g.m-2,在割取部分中的比例分别为64.19%、41.84%、53.81%和58.50%,割草区低于对照区。上述植物,地下部分生物量的贮量及分配比例的规律性不如地上部分明显,但总的趋势一致。割草区活根和根系残落物在8月30日的总贮量为936.12g·m3/2,活根占52.45%,根系残落物占47.55%。在活根中,羊草占4.8%、艹洽草占4.92%、其它草占90.28%。对照区活根和根系残落物的总量为946.88g.m3/2,活根占47.79%,根系残落物占52.21%。在活根的总量中,羊草占1? The paper studies the storing amount and distribution of biomass of Leymus chinensis,koeleria.,cristata,other herbages and community of typical steppe in Inner Mongolia.The results obtained are as foloows:mowing has influence on them in varying degrees.The top period is on August 30 and the storing biomass of above herbages in the mowing area is 59.92g.m -2 ,7.32g.m -2 ,121.32g.m -2 and 188.35g.m -2 in turn,the percentages in mowing amount are 57.03%,21.58%,49.81% and 51.06%.The storing amount in the contrast area is 105.13g.m -2 ,8.10g.m -2 ,97.06g.m -2 and 210.39g.m -2 ,and the percentages in the mowing amount are 64.19%,41.84%,53.81%and 58.50%.In addition,the rule of storing amount and distribution of underground biomass isn't obvious as aboveground biomass,however,the trendence is identical.The total storing amount of living root and the litter of root system is 936.12g.m -2 on August 30,for the living root,the percentage is 52.45%,the litter of root system is for 47.55%.For the living root,leymus chinensis 4.80%,Koeleris cristata 4.92%,othr herbages 90.28%. The total storing amount of living root and litter of root system of the contrast area is 946.88g.m -2 ,of which,living root is 47.79%,litter of root system 52.21%.For the living root,Leymus chinensis 12.23%,Koeleria cristata 3.22%,other herbages 84.55%. \ \
出处 《干旱区资源与环境》 CSCD 1999年第2期25-32,共8页 Journal of Arid Land Resources and Environment
基金 国家自然科学基金 中国科学院内蒙古草原生态系统定位研究站资助
关键词 典型草原 割草 生物量分配 植物 营养元素 贮量 Typical steppe, mowing,biomass distribution.
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二级参考文献5

  • 1任延凯,内蒙古大学学报,1989年,20卷,2期,260页
  • 2团体著者,草地经营,1989年
  • 3仲延凯,草原生态系统研究.2,1988年,158页
  • 4姜恕,草原生态系统研究.1,1985年,12页
  • 5团体著者,植物生态学,1980年

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