| 典型草原不同围封年限植被-土壤系统碳氮贮量的变化 |
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| 引用本文： | 敖伊敏,焦燕,徐柱.典型草原不同围封年限植被-土壤系统碳氮贮量的变化[J].生态环境,2011(10):1403-1410. |
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| 作者姓名： | 敖伊敏 焦燕 徐柱 |
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| 作者单位： | 内蒙古师范大学化学与环境科学学院;中国农业科学院草原研究所; |
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| 基金项目： | 国家自然科学基金项目(41165010); 国家重点基础研究发展计划973项目(2007CB106806); 中央级公益性科研院所基本科研业务费专项基金项目; 国家重点实验室开放课题(LAPC-KF-2008-3) |
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| 摘 要： | 以内蒙古太仆寺旗典型草原为研究对象,研究不同围封年限下的天然草地植物和土壤有机碳、全氮贮量的变化。结果表明：与自由放牧草地相比,重度退化草地采取生长季围封恢复措施后,群落植物和土壤环境在围封8、11、14、21、25年后均得到了明显的改善,地上植物和地下根系生物量及其碳氮贮量、土壤碳氮贮量明显增加,土壤容重降低。自由放牧地和围封8、11、14、21年植物-土壤系统碳贮量分别为7 357.93、7 988.27、8 413.18、12 878.82、8 934.66 g.m-2,氮贮量分别为427.78、494.28、575.49、707.35、615.09 g.m-2。草地围封至14年植物和土壤各项理化性质达到最大值,使得植物-土壤系统的碳氮贮量分别是自由放牧地的1.75和1.65倍,说明植被与土壤间达到了良性循环的状态,退化草地正向演替。随着围封年限的继续增加,其各项指标出现下降趋势。由此可知,季节性围封措施在一定时间内可使退化草地的土壤-植物系统的碳氮贮量增加,草地在一定程度上得到恢复,但适宜的恢复时间和合理利用问题有待进一步讨论。
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| 关 键 词： | 典型草原 围封年限 植物碳氮贮量 土壤碳氮贮量 |
The changes of carbon and nitrogen storage of plant-soil system of enclosure years in typical steppe |
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| AO Yiming,JIAO Yan,XU Zhu .Grassl, Research Institute of Chinese Academy of Agricultural Science,Hohhot ,China,.College of Chemistry , Environmental Sciences,Inner Mongolia Normal University,Hohhot.The changes of carbon and nitrogen storage of plant-soil system of enclosure years in typical steppe[J].Ecology and Environmnet,2011(10):1403-1410. |
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| Authors: | AO Yiming JIAO Yan XU Zhu Grassl Research Institute of Chinese Academy of Agricultural Science Hohhot China College of Chemistry Environmental Sciences Inner Mongolia Normal University Hohhot |
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| Institution: | AO Yiming1,JIAO Yan1,XU Zhu2 1.Grassland Research Institute of Chinese Academy of Agricultural Science,Hohhot 010010,China,2.College of Chemistry and Environmental Sciences,Inner Mongolia Normal University,Hohhot 010022 |
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| Abstract: | A research was conducted on the typical steppe in Taibusi County of the Inner Mongolia to compare with carbon and nitrogen storage of the soil-plants system of different enclosure years.Field surveys on during the period from 1985—2010 were used to build a chronosequence of enclosure age since the enclosure of grassland.The result showed that compared with free grazing,Carbon and nitrogen storage of above-and-under ground biomass and soil significantly increased,after 8,11,14,21,25 years after growing season enclosure.The plant-soil system carbon storages were 7357.93,7988.27,8413.18,12878.82,8934.66 g？m-2,and N storages were 427.78,494.28,575.49,707.35,615.09 g？m-2,free grazing grassland and 8,11,14 and 21 years of enclosure grassland,respectively.After enclosure 14 years,carbon and nitrogen storage of the plant-soil systems was maximum compare with free grazing. |
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| Keywords: | Tropical steppe enclosure carbon storage nitrogen storage |
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