自然资源学报 ›› 2018, Vol. 33 ›› Issue (11): 2006-2019.doi: 10.31497/zrzyxb.20171141

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湖北省土地整治项目碳效应核算及其分析

张利国, 王占岐*, 李冰清   

  1. 中国地质大学(武汉)公共管理学院,武汉 430074
  • 收稿日期:2017-10-27 出版日期:2018-11-20 发布日期:2018-11-20
  • 通讯作者: 王占岐(1965- ),男,陕西岐山人,博士,教授,博士研究生导师,主要研究方向为土地规划与土地生态。E-mail: zhqwang@cug.edu.cn
  • 作者简介:张利国(1989- ),男,广西贺州人,博士研究生,中国自然资源学会会员(S300002291M),主要研究方向为土地利用生态效应。E-mail: zh.liguo@163.com
  • 基金资助:
    国家自然科学基金资助项目(71673258)

Carbon Effect Accounting and Analysis of Land Consolidation in Hubei Province

ZHANG Li-guo, WANG Zhan-qi, LI Bing-qing   

  1. School of Public Administration, China University of Geosciences, Wuhan 430074, China
  • Received:2017-10-27 Online:2018-11-20 Published:2018-11-20
  • Supported by:
    National Natural Science Foundation of China, No. 71673258.

摘要: 论文通过构建土地整治项目碳效应分析框架,将土地整治碳效应分为短期碳效应及长期碳效应,其中短期碳效应分为工程施工碳效应及地类转换碳效应,长期碳效应分为农田生态系统固碳效应和农业耕作活动碳效应。以湖北省14个土地整治项目为例,采用碳排放系数法、生态系统类型法等进行整治项目碳效应核算,并计算土地整治项目实施后达到碳平衡所需的时间,对比分析处于不同地貌类型及工程类型区的土地整治项目碳效应及其构成的差异性。研究结果表明:工程施工是土地整治项目碳排放的主要来源,各项目碳排放总量为4 602.00~22 760.81 t,单位面积碳排放为5.18~19.62 t/hm2;地类转换既有碳汇效应,又有碳排放效应;土地整治后,各项目农田生态系统固碳能力增加了412.27~2 794.91 t/a;耕作活动碳排放也较整治前有所增加,增加强度从8.11 t/a至463.76 t/a不等。整治工作后各项目达到碳平衡的时间最少需要2.68 a,最多需要36.66 a。对比分析表明,地形地貌、工程类型虽不是土地整治各类碳效应产生的决定性因素,但却间接地在工程施工难易程度、排灌条件、耕地产能等多方面对土地整治项目区碳效应产生重大影响。

关键词: 核算, 湖北省, 碳平衡, 碳效应, 土地整治

Abstract: An analytical framework is established to analyze the carbon effects of land consolidation projects, which includes short-term effects (SE) and long-term effects (LE). The SE includes engineering construction effects (ECE) and land use conversion effects (LUCE). The LE contains farmland ecosystem effects (FEE) and agricultural activities effects (AAE). Carbon emission coefficient method and ecosystem type method were used to account carbon emission for consolidation projects. After calculating the carbon emission, the time needed to achieve carbon balance after implementation was accounted. The comparative analysis is used to analyze the carbon effects of each project which belongs to different topography regions and engineering regions. We selected fourteen consolidation projects in Hubei Province as research cases. Five of them locate in plain area, four in hilly area, and five in mountains area. Among 14 projects, eight belong to the plain engineering model area (Ⅱ2), and six belong to the river (gully) valley basin engineering model area (Ⅲ1). During the implementation, all the projects showed carbon emission effect. The average amount of carbon emissions of projects located in plain, hilly, mountain areas, Ⅱ2 region and Ⅲ1 region was 8 541.47, 14 266.45, 12 591.86, 11 415.09 and 11 901.97 t, respectively. The average carbon emission per unit area was 6.29, 12.37, 15.80, 9.06 and 14.58 t/hm2, respectively. The average carbon emission per unit investment was 2.76, 3.77, 4.92, 3.31 and 4.50 t/million yuan, respectively. As to LUCE, the projects in plain area mainly showed carbon absorption effects, with an average value of 184.13 t per project. The projects in mountainous area showed carbon emission effects with an average value of 5 398.49 t per project, depending on the conversions of land use types such as forest land or grassland with high carbon reserves converting into other types of land. After consolidation, the area, quality and biological yield of cultivated land increased in different degrees. The average added value of carbon sequestration of FEE in plain area is 1 554.43 t/a, in hilly area is 1 125.40 t/a and in mountain area is 1 241.65 t/a. After land consolidation, irrigation and drainage facilities of each project area generally increased, thus leading to a larger increase of paddy field irrigation. Therefore, the carbon emission increased. The carbon emission of AAE increased in varying degrees (from 8.11 t/a to 463.76 t/a) after consolidation. It took different time for projects to balance SE caused by remediation activities. For these projects, the average time needed to achieve carbon balance after consolidation in plain area was 5.24 a, in hilly area was 10.87 a and in mountainous area was 19.68 a. At the end of this paper, some suggestions on how to form a low-carbon consolidation model were put forward.

Key words: accounting, carbon balance, carbon effect, Hubei Province, land consolidation

中图分类号: 

  • F301.24