| 退化草地暗沃寒冻雏形土CO2释放的日变化和季节动态 |
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| 引用本文： | 张金霞,曹广民,周党卫,赵新全,周兴民.退化草地暗沃寒冻雏形土CO2释放的日变化和季节动态[J].土壤学报,2001,38(1):32-40. |
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| 作者姓名： | 张金霞 曹广民 周党卫 赵新全 周兴民 |
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| 作者单位： | 张金霞（中国科学院西北高原生物研究所，西宁
810001）;曹广民（中国科学院西北高原生物研究所，西宁 810001）;周党卫（中国科学院西北高原生物研究所，西宁 810001）;赵新全（中国科学院西北高原生物研究所，西宁 810001）;周兴民（中国科学院西北高原生物研究所，西宁 810001） |
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| 基金项目： | 国家重点基础研究项目（G1998040800）、中国科学院青藏高原研究项目（KZ951-A1-204、KZ95T-06）和中国科学院海北高寒草甸生态系统定位站基金资助项目 |
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| 摘 要： | 采用CI-301PS红外CO
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| 关 键 词： | CO2释放速率 暗沃寒冻雏形土 气温 地温 退化草地 过度放牧 |
| 收稿时间： | 8/5/1999 12:00:00 AM |
| 修稿时间： | 1999年8月5日 |
DIEL AND SEASONAL CHANGES OF CARBON DIOXIDE EMISSION FROM MOLLIC-CRYIC CAMBISOLS ON DEGRADED GRASSLAND |
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| Zhang Jin-xi,Cao Guang-min,Zhou Dang-wei,Zhao Xin-quan and Zhou Xing-min.DIEL AND SEASONAL CHANGES OF CARBON DIOXIDE EMISSION FROM MOLLIC-CRYIC CAMBISOLS ON DEGRADED GRASSLAND[J].Acta Pedologica Sinica,2001,38(1):32-40. |
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| Authors: | Zhang Jin-xi Cao Guang-min Zhou Dang-wei Zhao Xin-quan and Zhou Xing-min |
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| Institution: | The Northwest Plateau Institute of Biologv, The Chinese Academy of Sciences, Xining 810001;The Northwest Plateau Institute of Biologv, The Chinese Academy of Sciences, Xining 810001;The Northwest Plateau Institute of Biologv, The Chinese Academy of Sciences, Xining 810001;The Northwest Plateau Institute of Biologv, The Chinese Academy of Sciences, Xining 810001;The Northwest Plateau Institute of Biologv, The Chinese Academy of Sciences, Xining 810001 |
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| Abstract: | Diel and seasonal changes of carbon dioxide emission from Mollic-Cryic Cambisols on degraded grassland were studied. The results indicated that: (1) Diel maximum rate of CO2 efflux appeared at 12:00-16:00 and minimum at 4:00-8:00. Rate of CO2 efflux in the daylight was greater than that in the night. (2) There were significant seasonal dynamic and phenophase changes in rate of Cqemission. Diel average rate of CO2 emission was 320.86±130.49mgm-2h-1.Phenophase variation was exuberance>withering>green up. (3) Diel change course of rate of CO2 emission was controlled by air temperature and soil surface temperature. However, the correlations between seasonal dynamic of rate of CO2 emission and air temperature, soil surface temperature, and temperature of each layer of soil (5cm, 10cm, 15cm, 20cm, 30cm) were very significant (P<0.01). (4) The rate of Cqemission from Mollic-Cryic Cambisols on the over grazing pasture is lower than that on the moderately grazing pasture. |
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| Keywords: | Rate of CO2 emission Mollic-Cryic Cambisols Air temperature Soil temperature |
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