The Rate of Carbon Dioxide Release from Alpine Scrubby Meadow Soil Under Different Grazing Intensity

doi:10.11733/j.issn.1007-0435.2001.03.005

›› 2001, Vol. 9 ›› Issue (3): 183-190.DOI: 10.11733/j.issn.1007-0435.2001.03.005

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The Rate of Carbon Dioxide Release from Alpine Scrubby Meadow Soil Under Different Grazing Intensity

ZHANG Jin-xia, CAO Guang-min, ZHOU Dang-wei, ZHAO Xin-quan

Northwest Plateau Institute of Biology, Chinese Academy of Sciences, Xining, 810001, China

Received:2000-08-24 Revised:2000-10-20 Online:2001-08-15 Published:2001-08-15

放牧强度对高寒灌丛草甸土壤CO₂释放速率的影响

张金霞, 曹广民, 周党卫, 赵新全

中国科学院西北高原生物研究所, 西宁, 810001

作者简介:张金霞(1941- ),女,研究员,长期从事草原生态物质循环研究工作,发表论文近40篇
基金资助:
国家重点基础研究专项(G1998040800)资助;中国科学院知识创新工程项目(KSCX2-1-07);国家自然科学基金项目(30070147);中国科学院

Abstract

Abstract: The fields experiment was conducted at Haibei research station of alpine meadow ecosystem,Chinese Academy of Sciences.The results indicated that:The rate of CO₂ release rate occurred obviously daily change,the daily released CO₂ were 7.774±5.577g/m²·d(Lightly grazing)and 6.977±4.947g/m²d(Heavily grazing)respectively,its release peak was at 12:00-14:00 and the valley at 6:00-8:00 in the morning.There was significant seasonal dynamic of release rate of CO₂,maximum value was in July and minimum in winter.The correlated relationship between daily change in rate of CO₂ release and air temperature of soil surface temperature was very significant(P<0.01).The correlation were extreme significant(P<0.01)between seasonal dynamic of rate of CO₂ release and air temperature and soil temperture(0-30cm).Heavily grazing make arte of CO₂ release decreased.

Key words: Rate of CO₂ release, Grazing intensity, Alpine scrub meadow

摘要： 在中国科学院海北高寒草甸生态系统定位站,研究放牧强度对土壤CO₂释放速率的影响及其与环境条件的关系。结果表明,CO₂释放速率具有明显的日变化规律,日最大值在12:00-14:00h出现,最低值出现于凌晨6:00-8:00h。轻牧和重牧区日释放速率分别为7.774±5.577g·m^-2·d^-1和6.977±4.947g·m^-2·d^-1。CO₂释放速率具有明显的季节变化,最大值均出现在7月,而冬季则最低。CO₂释放速率的日变化主要受气温和地表温度的制约,与气温和地表温度呈极显著的正相关(P<0.01)。CO₂释放速率的季节动态与气温和地温(0-30cm)呈极显著的正相关(P<0.01)。放牧使CO₂释放速率降低。

关键词: CO₂释放速率, 放牧强度, 高寒灌丛草甸

CLC Number:

S12.

ZHANG Jin-xia, CAO Guang-min, ZHOU Dang-wei, ZHAO Xin-quan. The Rate of Carbon Dioxide Release from Alpine Scrubby Meadow Soil Under Different Grazing Intensity[J]. , 2001, 9(3): 183-190.

张金霞, 曹广民, 周党卫, 赵新全. 放牧强度对高寒灌丛草甸土壤CO₂释放速率的影响[J]. , 2001, 9(3): 183-190.

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The Rate of Carbon Dioxide Release from Alpine Scrubby Meadow Soil Under Different Grazing Intensity

放牧强度对高寒灌丛草甸土壤CO₂释放速率的影响

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The Rate of Carbon Dioxide Release from Alpine Scrubby Meadow Soil Under Different Grazing Intensity

放牧强度对高寒灌丛草甸土壤CO2释放速率的影响

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放牧强度对高寒灌丛草甸土壤CO₂释放速率的影响