The Estimation of Actual and Potential Carbon Sequestration in Typical Steppe in Xilingol County,Inner Mongolia

doi:10.11733/j.issn.1007-0435.2021.10.019

Acta Agrestia Sinica ›› 2021, Vol. 29 ›› Issue (10): 2274-2285.DOI: 10.11733/j.issn.1007-0435.2021.10.019

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The Estimation of Actual and Potential Carbon Sequestration in Typical Steppe in Xilingol County,Inner Mongolia

HE Yuan, LI Xing-rui, YANG Xiao-fan, TANG Hai-ping

School of Natural Resources, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China

Received:2021-02-23 Revised:2021-04-05 Online:2021-10-15 Published:2021-11-05

内蒙古锡林郭勒盟典型草原固碳量及固碳潜力估算

何源, 李星锐, 杨晓帆, 唐海萍

北京师范大学地理科学学部自然资源学院, 北京 100875

通讯作者: 唐海萍,E-mail:tanghp@bnu.edu.cn
作者简介:何源(1998-),男,汉族,北京人,硕士研究生,主要从事生态系统建模研究,E-mail:yuanhe@mail.bnu.edu.cn
基金资助:
国家自然科学基金面上项目（31972945）资助

Abstract

Abstract: In order to assess the influence of grazing intensity to grassland actual and potential carbon sequestration, this study coupled pool-flux model with CASA light-efficiency model, Shiyomi grazing model, Raich soil respiration model, etc., establishing the annual sample-scaled coupled human and natural carbon cycle model within the systematic dynamic modeling framework, which involved three sub-systems and four carbon pools. Results showed that under the background of ‘cooling and wetting’ trends in Xilingol County, Inner Mongolia, the NPP showed a trend of increasing;and the annual NEP of typical grassland showed a trend of decreasing. The productivity was the lowest and potential carbon sequestration was the highest under the grazing intensity of 3 sheep·ha^-1, which was -16.2 gC·m^-2 and 24.84TgC, respectively. Thus we suggested that the grazing intensity in the western typical grassland of Xilin Gol (Nambaolige station, League) in Inner Mongolia should not exceed 1.5 sheep·ha^-1, and the grazing intensity in the eastern typical grassland (Duolun County, East Ujumchin, West Ujumchin, Xilinhot) should not exceed 4.5 sheep·ha^-1.

Key words: Typical grassland, Grazing intensity, Systematic dynamic model, Carbon cycle model

摘要： 为了评价不同放牧强度对草原固碳量及固碳潜力的影响，本研究采用系统动力学建模方法耦合CASA光合利用率模型、Shiyomi放牧模型、Raich土壤呼吸模型等模型，建立了基于系统动力学库-流思路的碳循环模型，该模型包含3个子系统、4个碳库。结果表明：1998至2015年，在内蒙古锡林郭勒盟的温度降低、降水量增加的背景下，净初级生产力呈现升高的趋势，典型草原土壤固碳量呈现下降趋势；放牧强度在3羊·公顷^-1下净生态系统初级生产力最低，固碳潜力最大，分别为-16.2 gC·m^-2和24.84 TgC。因此，建议内蒙古锡林郭勒盟典型草原西部（阿巴嘎旗、那仁宝力格站）的放牧强度不宜超过1.5羊·公顷^-1；东部（多伦县、东乌珠穆沁、西乌珠穆沁、锡林浩特站）不宜超过4.5羊·公顷^-1。

关键词: 典型草原, 放牧强度, 系统动力学模型, 碳循环模型

CLC Number:

S155.4+7

HE Yuan, LI Xing-rui, YANG Xiao-fan, TANG Hai-ping. The Estimation of Actual and Potential Carbon Sequestration in Typical Steppe in Xilingol County,Inner Mongolia[J]. Acta Agrestia Sinica, 2021, 29(10): 2274-2285.

何源, 李星锐, 杨晓帆, 唐海萍. 内蒙古锡林郭勒盟典型草原固碳量及固碳潜力估算[J]. 草地学报, 2021, 29(10): 2274-2285.

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The Estimation of Actual and Potential Carbon Sequestration in Typical Steppe in Xilingol County,Inner Mongolia

内蒙古锡林郭勒盟典型草原固碳量及固碳潜力估算

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