喀斯特石漠化综合治理区表层土壤有机碳时空动态特征与趋势探讨

熊康宁; 周文龙; 龙健; 罗井升

doi:10.3969/j.issn.1001-4810.2011.04.006

喀斯特石漠化综合治理区表层土壤有机碳时空动态特征与趋势探讨

doi: 10.3969/j.issn.1001-4810.2011.04.006

1.
贵州师范大学中国南方喀斯特研究院；贵州省喀斯特山地生态环境国家重点实验室培育基地
2.
贵州省喀斯特山地生态环境国家重点实验室培育基地
3.
贵州师范大学中国南方喀斯特研究院

基金项目: 贵州省科技计划课题“贵州喀斯特石漠化生态系统综合整治技术与模式的研究与示范”(黔科合S字[2007]1061号)、国家自然科学基金“喀斯特地区石漠化过程土壤微生物生态特征及响应机制”(40971160)

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出版历程
- 收稿日期: 2011-10-19
- 发布日期: 2011-12-25

Spatial-temporal dynamic features and tendency of the topsoil organic carbon in integrated rehabilitating karst rocky desert

1.
Institute of South China Karst, Guizhou Normal University；The State Key Laboratory Incubation Base for Karst Mountain Ecology Environment of Guizhou Province, Guizhou Normal University
2.
The State Key Laboratory Incubation Base for Karst Mountain Ecology Environment of Guizhou Province, Guizhou Normal University
3.
Institute of South China Karst, Guizhou Normal UniversityUniversity

摘要

摘要: 以中国南方喀斯特地区具有代表性的贵州为例,选取三个典型石漠化综合治理示范区,以2006年4月野外监测和2009年4月重复采样的数据为基础,分析喀斯特脆弱生态区实施石漠化综合治理工程的土壤有机碳时空动态特征和发展趋势。结果表明:经过3年的石漠化综合治理,不同等级石漠化样地表层土壤有机碳密度增幅不一,其中轻、中度石漠化样地提升幅度最大,无、潜在石漠化样地次之,强度石漠化样地最小;不同工程措施下表层土壤有机碳密度特征表现为:封山育林育草>退耕还林还草>坡改梯;增幅表现为:退耕还林还草>封山育林育草>坡改梯。石漠化治理过程中,随着轻度以上石漠化土地面积的减少,表土碳储量进一步增大,而且表层土壤有机碳多分布于潜在和无石漠化区。随着石漠化综合治理进程的推进,表土有机碳密度可能呈S型曲线增长,但由于潜在、无石漠化区多为基本农田,土壤有机碳密度将在较长时间内保持相对平稳的状态。而轻、中度石漠化样地在治理初期其表土有机碳密度增幅将最快。因此,采取有效的土地利用方式与加强可持续管理对提高表层土壤的固碳潜力具有非常重要的意义。
- 土壤有机碳 /
- 密度 /
- 碳储量 /
- 喀斯特石漠化
Abstract: Taking the Guizhou Province, a representative karst area, for example, three typical demonstration areas for integrated rehabilitation to karst rocky desertification is chosen in the study. Based on the field monitored data in April 2006 and repeated sampling data in April 2009, the spatial-temporal dynamic characteristics of the topsoil in fragile environment under integrated rehabilitating is analyzed. The result proves the following items. After 3 years rehabilitation, the increase in topsoil organic carbon density at different plots of different desertification grades is different with each other. The amount of the increase in topsoil organic carbon density at mild and moderate rocky desertification plots is the largest, inconspicuous or potential rocky desertification plots is the second, and the serious rocky desertification is the smallest. Organic carbon density of the topsoil under different engineering measures manifests as: closed treatment ＞ recovering farmland to forests and grassland ＞ the project of transforming slope to terrace. While the growth manifests as: recovering farmland to forests and grassland ＞ closed treatment ＞ the project of transforming slope to terrace. Along with the decreases in land area of mild rocky desertification grade or more seriously desertification grade, the carbon storage of the topsoil increases further, and the carbon storage of the topsoil mainly exists in potential rocky desertification plot or not deserted region. The growth trend of topsoil organic carbon density perhaps presents the “S” pattern along with the rehabilitation, but the organic carbon density of topsoil in inconspicuous and potential rocky desertification plots will keep steady state in a long time for those lands are the basic farmland generally. At the mild and moderate rocky desertification plots, the increase in topsoil organic carbon density is the largest in early rehabilitation stage. So take effective methods of land use and strengthen sustainable management is of extremely vital significance in improving the carbon sequestration.
- soil organic carbon /
- density /
- carbon storage /
- karst rocky desertification

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参考文献(27)

[1]	Yuan Daoxian. The carbon Cycle in karst. Zeitschrift fir Geomorphologies Neue Folge, 1997, 108(Suppl-Bd):91-102.
[2]	袁道先.地球系统的碳循环和资源环境效应［J］.第四纪研究,2001,21(3):223-232.
[3]	袁道先.喀斯特与全球变化研究［J］.地球科学进展,1995,10(5):471-474.
[4]	翁金桃.碳酸盐岩在全球碳循环过程中的作用［J］.地球科学进展,1995,10(2):154-158.
[5]	方华军,杨学明,张晓平,等.土壤侵蚀对农田中土壤有机碳的影响［J］.地理科学进展,2004,23(2):77-87.
[6]	Schimel D S, House J I, Hibbard K A, et a1. Recent patterns and mechanisms of carbon exchange by terrestrial ecosystems. Nature, 2001, 414:169-72.
[7]	Pacala S W, Hurtt G C, Baker D, et a1. Consistent land-and atmosphere based U.S. carbon sink estimates. Science, 2002, 292:2316-23.
[8]	Myneni R B, Dong J, Tucker C J, Kaufmann R K, Kauppi P E, Liski J, et a1. A large carbon sink in the woody biomass of northern forests. Proc. Natl. Acad Sci. USA., 98(26):14784-14789.
[9]	周文龙,熊康宁,龙健,等.喀斯特石漠化综合治理区表层土壤有机碳密度特征及区域差异［J］.土壤通报,2011,42(5):1131-1137.
[10]	陈伟杰,任晓冬,熊康宁.喀斯特石漠化地区开展林业碳汇项目的可行性初探——以贵州喀斯特石漠化综合防治为例［J］.安徽农业科学,2010,10(38):5254-5258.
[11]	唐晓红,吕家恪,魏朝富,等.区域稻田土壤碳储量的空间分布特征［J］.中国农学通报,2009,25(14)173-177.
[12]	徐艳,张凤荣,段增强,等.区域土壤有机碳密度及碳储量计算方法探讨［J］.应用生态学报,2005,36(6):836-839.
[13]	张心昱,陈利顶,傅伯杰,等.不同农业土地利用方式和管理对土壤有机碳的影响——以北京市延庆盆地为例［J］.生态学报,2006,26(10):3198-3203.
[14]	熊康宁,黎平,周忠发,等.喀斯特石漠化的遥感-GIS典型研究——以贵州省为例［M］.北京:地质出版社,2002:23-28.
[15]	中国标准出版社第二编辑室.环境监测方法标准汇编(土壤环境与固体废物)［M］.北京:中国标准出版社,2007:327-440.
[16]	中国科学院南京土壤研究所土壤物理研究室.土壤物理性质测定方法［M］.北京:上海科学技术出版社,1978:11-148.
[17]	王世杰,卢红梅,周运超,等.茂兰喀斯特原始森林土壤有机碳的空间变异性与代表性土样采集方法［J］.土壤学报,2007,44(3):475-483.
[18]	魏孝荣,邵明安,高建伦.黄土高原沟壑区小流域土壤有机碳与环境因素的关系［J］.环境科学,2008,29(10):2879-2884.
[19]	Kern J S, Turner D P, Dodson R F. Special patterns in soil organic carbon pool size in the northwestern United States［J］. In; Lal R. Soil Processes and the Carbon Cycle. Boca Raton, FL: Lewis Publishers, 1998:29-43.
[20]	张勇,史学正,赵永存,等.滇黔桂地区土壤有机碳储量与影响因素研究［J］.环境科学,2008,29(8):2314-2319.
[21]	苏永中,赵哈林.土壤有机碳储量、影响因素及其环境效应的研究进展［J］.中国沙漠,2002,22(3):220-228.
[22]	王燕,王小彬,刘爽,等.保护性耕作及其对土壤有机碳的影响［J］.中国生态农业学报,2008,16(3):776-771.
[23]	张伟,陈洪松,王克林,等.喀斯特峰从洼地坡面土壤养分空间变异性研究［J］.农业工程学报,2008,24(1):68-73.
[24]	欧阳资文,彭晓霞,宋同清,等.喀斯特峰从洼地土壤有机质的空间变化及其对干扰的响应［J］.应用生态学报,2009,20(6):1329-1336.
[25]	罗海波,刘方,刘元生,等.喀斯特石漠化地区不同植被群落的土壤有机碳变化［J］.林业科学,2009,45(9):24-28.
[26]	林而达,李玉娥,郭李萍,等.中国农业土壤固碳潜力与气候变化［M］.北京:科学出版社,2005:102-113.
[27]	李阳兵,王世杰,罗光杰,等.喀斯特石漠化演变轨迹的典型案例研究——以贵州盘县为例［J］.中国地质灾害与防治学报,2010,21(3):118-124.