生态学报2017，Vol.37Issue(9)：3074-3083,10.DOI:10.5846/stxb201601140091
放牧对鄂尔多斯高原油蒿草场生物量及植被-土壤碳密度的影响
Effects of grazing on plant biomass and the carbon density of vegetation and soil in the Artemisia ordosica shrubland of the Ordos Plateau
摘要
Abstract
Plant biomass and the carbon density of vegetation and soil in enclosed and grazed Artemisia ordosica shrubland of the Ordos Plateau were studied in the field and in the laboratory.The results revealed that the grazed plots supported plant communities with a higher the number of species yet lower vegetation coverage than did the enclosure plots.Grazing,moreover,reduced the overall above-and below-ground biomass of plant communities,as well as the proportion of above-and below-ground biomass consisting of A.ordosica.Nevertheless,during the growing season the grazed plots produced significantly more litter biomass than did the enclosure plots (P ＜ 0.05).When protected by enclosures,however,the carbon density of the vegetation was higher,whereas that of the soil was lower,than that under grazing;although their seasonal averages did not differ significantly between the two plot treatments (P ＞ 0.05).Ninety percent of carbon storage was in the soil in A.ordosica shrubland.The percentages of carbon density of soil accounting for the vegetation-soil system were 91％ in enclosed plot and 93％ in grazed plot,respectively.The carbon density ofA.ordosica shrubland was 2.29 kg/ m2in enclosed plot and 2.68 kg/m2 in grazed plot.Grazing had little impact on carbon density of vegetation-soil in A.ordosica shrubland.关键词
植物生物量/碳密度/油蒿/围封/放牧Key words
plant biomass/carbon density/Artemisia ordosica/enclosed/grazed引用本文复制引用
高丽,朱清芳,闫志坚,王育青,侯向阳,戴雅婷..放牧对鄂尔多斯高原油蒿草场生物量及植被-土壤碳密度的影响[J].生态学报,2017,37(9):3074-3083,10.基金项目
国家重点基础研究发展计划(973计划)项目(2014CB138806) （973计划）
“十二五”国家科技支撑计划项目(2012BAD13B07) （2012BAD13B07）
国家国际科技合作专项项目(2013DFR30760) （2013DFR30760）
中央级公益性科研院所基本科研业务费专项资金(1610332015008) （1610332015008）
农业部鄂尔多斯沙地草原生态环境重点野外科学观测试验站项目 （）
