Effect of different vegetation types on soil organic carbon in Mu Us desert

Abstract

Abstract: Through comparing the concentration and inventory of soil organic carbon (SOC) and its distribution in soil profiles under nine different vegetation types in the Mu Us desert, the effect of different vegetation types on SOC were studied. The order of the concentration and inventory of SOC in the 0―80 cm soil layer were: Iris lactea var. chinensis community>Achnatherum splendens community>Salix matsudana community>Artemisia ordosica community on fixed sandy land>Salix psammophila community>Artemisia ordosica community on semifixed sandy land>farmland>Caragana intermedia community>shifting sandy land. With an increase of soil depth, the SOC concentration showed a significant accumulation in the A. ordosica community (fixed sandy land), C. intermedia community, S. matsudana community, A. splendens community, I. lactea var. chinensis community and farmland, but was gradually reduced in the A. ordosica community (semifixed sandy land), shifting sandy land and S. psammophila community. The distributions in soil profiles of SOC inventory and SOC concentration under each vegetation type were similar but differed in amplitude of variation. Vegetation construction on shifting sand would contribute to soil carbon sequestration and the A. ordosica and S. psammophila communities had better effects. Strong human disturbance should be reduced or avoided to prevent the change of carbon in shallow soil layers and to keep the stability of the soil carbon pool.

CLC Number:

S153.6⁺2

DING Yue-kui, YANG Jie, SONG Bing-yu, Hugejiletu, ZHANG Lin. Effect of different vegetation types on soil organic carbon in Mu Us desert[J]. Acta Prataculturae Sinica, 2012, 21(2): 18-25.

References

[1] Post W M, Peng T H, Emanuel W R, et al. The global carbon cycle[J]. American Scientist, 1990, 78: 310-326.
[2] Davidson E A, Trumbore S E, Amundson R. Soil warming and organic carbon content[J]. Nature, 2000, 408: 789-790.
[3] Zhou C H, Zhou Q M, Wang S Q. Estimating and analyzing the spatial distribution of soil organic carbon in China[J]. A Journal of the Human Environment, 2003, 32(1): 6-12.
[4] Vitousek P M, Mooney H A, Lubchenco J, et al. Human domination of Earth’s ecosystems[J]. Science, 1997, 277(25): 494-499.
[5] Tian H, Melillo J M, Kicklighter D W, et al. Climatic and biotic controls on annual carbon storage in Amazonian ecosystems[J]. Global Ecology and Biogeography, 2000, (9): 315-335.
[6] Houghton R A. Land-use change and the carbon cycle[J]. Global Change Biology, 1995, (1): 275-287.
[7] 牛兰兰, 张天勇, 丁国栋. 毛乌素沙地生态修复现状、问题与对策[J]. 水土保持研究, 2006, 13(6): 239-246.
[8] 杨晶, 沈禹颖, 南志标, 等. 保护性耕作对黄土高原玉米-小麦-大豆轮作系统产量及表层土壤碳管理指数的影响[J]. 草业学报, 2010, 19(1): 75-82.
[9] 李东, 黄耀, 吴琴, 等. 青藏高原高寒草甸生态系统土壤有机碳动态模拟研究[J]. 草业学报, 2010, 19(2): 160-168.
[10] 乔有明, 王振群, 段中华. 青海湖北岸土地利用方式对土壤碳氮含量的影响[J]. 草业学报, 2009, 18(6): 105-112.
[11] Jobbágy E G, Jackson R B. The vertical distribution of soil organic carbon and its relation to climate and vegetation[J]. Ecological Applications, 2000, 10: 423-436.
[12] Wang S Q, Huang M, Shao X M, et al . Vertical distribution of soil organic carbon in China[J]. Environmental Management, 2004, 33: 200-209.
[13] Batjes N H, Sombroek S L. Possibilities for carbon sequestration in tropical and subtropical soils[J]. Global Change Biology, 1997, 3: 161-173.
[14] Batjes N H, Dijkshoorn J A. Carbon and nitrogen stocks in the soils of the Amazon Region[J]. Geoderma, 1999, 89: 273-286.
[15] 刘树林, 王涛, 屈建军. 浑善达克沙地土地沙漠化过程中土壤粒度与养分变化研究[J]. 中国沙漠, 2008, 28(4): 611-616.
[16] 李玉强, 赵哈林, 赵学勇, 等. 科尔沁沙地沙漠化过程中土壤碳氮特征分析[J]. 水土保持学报, 2005, 19(5): 73-76,182.
[17] 赵哈林, 李玉强, 周瑞莲. 沙漠化对科尔沁沙质草地生态系统碳氮储量的影响[J]. 应用生态学报, 2007, 18(11): 2412-2417.
[18] 李玉强, 赵哈林, 移小勇, 等. 沙漠化过程中科尔沁沙地植物土壤系统碳氮储量动态[J]. 环境科学, 2006, 27(4): 635-640.
[19] 李玉霖, 孟庆涛, 赵学勇, 等. 科尔沁沙地流动沙丘植被恢复过程中群落组成及植物多样性演变特征[J]. 草业学报, 2007, 16(6): 54-61.　
[20] 文海燕, 赵哈林, 傅华. 开垦和封育年限对退化沙质草地土壤性状的影响[J]. 草业学报, 2005, 14(1): 31-37.
[21] 蒋德明, 曹成有, 李雪华, 等. 科尔沁沙地植被恢复及其对土壤的改良效应[J]. 生态环境, 2008, 17(3): 1135-1139.
[22] 谭明亮, 段争虎, 陈小红. 流沙地恢复过程中土壤特性演变研究[J]. 中国沙漠, 2008, 28(4): 685-689.