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| 围封和放牧条件下高寒矮嵩草草甸土壤性质的比较 | |
| 引用本文： | 乔春连,王基恒,葛世栋,陈懂懂,赵亮,李英年,徐世晓.围封和放牧条件下高寒矮嵩草草甸土壤性质的比较[J].草业科学,2012,29(3):341-345. |
| 作者姓名： | 乔春连 王基恒 葛世栋 陈懂懂 赵亮 李英年 徐世晓 |
| 作者单位： | 1. 中国科学院西北高原生物研究所,青海西宁810008／中国科学院研究生院,北京100049／中国科学院高原生物适应与进化重点实验室,青海西宁810008 2. 中国科学院西北高原生物研究所,青海西宁810008／中国科学院研究生院,北京100049 3. 中国科学院西北高原生物研究所,青海西宁810008／中国科学院高原生物适应与进化重点实验室,青海西宁810008 4. 中国科学院西北高原生物研究所,青海西宁,810008 |
| 基金项目： | 基金项目:中国科学院战略性先导科技专项，中国科学院知识创新 |
| 摘 要： | 选取自2002年围封禁牧和持续冬季适度放牧两种处理下的高寒矮嵩草（Kobresia humilis）草地为研究对象，分别对其土壤呼吸速率、根系生物量、土壤含水量、土壤容重、土壤有机碳和全氮含量进行了比较分析。结果表明，持续冬季放牧条件下的土壤呼吸速率、根系生物量和土壤容重均高于围封禁牧的高寒草地，而土壤含水量、有机碳和全氮含量均显著低于围封草地。适度的放牧活动有利于地下生物量的积累，促进生物量向地下的转移，可以加速氮的矿化和土壤有机碳的分解，增加土壤的活性；适当的围封措施则可以保持土壤养分，避免土壤有机质流失。 |
| 关 键 词： | 围封 放牧 土壤呼吸速率 土壤有机碳 高寒草地 |
Comparison of soil properties under fencing and grazing in alpine meadow on Qinghai-Tibet Plateau |
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| QIAO Chun-lian,WANG Ji-heng,GE Shi-dong,CHEN Dong-dong,ZHAO Liang,LI Ying-nian,XU Shi-xiao.Comparison of soil properties under fencing and grazing in alpine meadow on Qinghai-Tibet Plateau[J].Pratacultural Science,2012,29(3):341-345. | |
| Authors: | QIAO Chun-lian WANG Ji-heng GE Shi-dong CHEN Dong-dong ZHAO Liang LI Ying-nian XU Shi-xiao |
| Institution: | 1,3(1.Northwest Plateau Institute of Biology,CAS,Xining 810001,China; 2.Graduate School of Chinese Academic of Science,Beijing 100049,China; 3.Key Laboratory of Adaptation and Evolution of Plateau Biota,Northwest Institute of Plateau Biology,Chinese Academy of Sciences,Xining 810001,China) |
| Abstract: | Soil properties under two conditions(fenced without grazing since 2002 and continuously grazed in the winter) were compared in the alpine meadow on Qinghai-Tibet Plateau.Under the two conditions,soil respiration rate,root biomass,soil water content,bulk densities,soil organic carbon and total nitrogen contents were compared and analyzed.The results showed that the soil respiration rate,bulk density and root biomass at the winter-grazed meadow were higher than those at the fenced meadow;while the soil water content,organic carbon and total nitrogen contents at the winter-grazed meadow were lower than those at the fenced meadow.Moderate grazing in the alpine meadow could increase the activities of soil microbes and accelerate mineralization and decomposition of soil nitrogen and organic carbon.However,appropriate exclusion of grazing can maintain soil nutrients and avoid loss of soil organic matter. |
| Keywords: | fencing grazing soil respiration rate soil organic carbon alpine meadow |
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