对念青唐古拉山东南坡高寒草原生态系统表层(0~20 cm)土壤有机碳分布特征进行研究,结果表明:有机碳密度平均为5.002 8±1.103 7 kg/m2,变异系数21.96 %;在拔4 421~4 598 m内,随海拔升高表现增加→减少→增加的分布特征;与地上及10~20 cm土层生物量、20~30 cm含水量、土壤有机质、速效N、全N和全P含量呈显著正相关,与20~40 cm容重呈显著负相关。影响其的第1因子是植被盖度、地上生物量、20~30 cm地下生物量和20~30 cm含水量,第2因子是0~20 cm和20~40 cm容重及全P量,第3因子是有机质含量和速效N含量,第4因子是0~10 cm地下生物量,累计贡献率92.83 %。
The distribution characteristics and the infulential factors of the topsoil (0-20cm) organic carbon in alpine grassland eocsystem at the southeast slope of Nyainqêntanglha Mountain were studied. It was shown that the average density of the topsoil (0-20cm) organic carbon was 5.0028±1.1037 kg/m2 and variability coefficient was 21.96%.With inreasing altitude, the distribution characteristics of the topsoil (0-20 cm) organic carbon density was increase→decrease →increase within the altitude range of 4421-4598 m.There was significant positive correlation between the topsoil organic carbon density and overground biomass, 10-20-cm underground biomass, 20-30-cm underground soil moisture,soil organic matter,soil active N, soil total N and soil total P content, but there was significant negative correlation between it and soil bulk density. The first factors were vegetation coverage, overground biomass, 20-30-cm underground biomass and 20-30-cm soil moisture, the second factors were 0-20-cm and 20-40-cm underground soil bulk density as well as soil total P content, the third factor were soil organic matter and soil active N content, the last factor was 0-10-cm underground biomass, and they contribution rate was 92.83 %.
[1] Batjes N H.Total carbon and nitrogen in soils of the world[J].European Journal of Soil Science,1996,47:151-163.
[2] Prentice I C. The carbon cycle and atmospheric carbon dioxide[M]. Houghton J T, DingY,Griggs D J, et al. Climate Change: The Scientific Basis. Cambridge:Cambridge University Press, 2001: 183-237.
[3] Jenkinson D S, Adams D E, Wild A. Model estimates of CO2 emissions from soils in response to global warming[J]. Nature, 1991,351: 304-306.
[4] Trumbore S E, Chadwick O A, Amundson R. Rapid exchange between soil carbon and atmospheric carbon dioxide driven by temperature change[J].Science, 1996,272:393-396.
[5] Davidson E A, Trumbore S E, Amundson R. Soil warming and organic carbon contents[J].Nature, 2000, 408:789-790.
[6] Ojima D S, Parton W J, Schimel D S, et al. Modelling the effects of climatic and CO2 changes on grassland storage of soil-C[J]. Water Air and Soil Pollution, 1993, 70:643-657.
[7] Gielen B, Ceulemans R. The likely impact of rising atmospheric CO2 on natural and managed Populous a literature review[J]. Environmental Pollution, 2001, 115:335-358.
[8] Hamilton J G, Delucia E H, George K et al. Forest carbon balance under elevated CO2 [J].Oecologia, 2002, 131:250-260.
[9] 徐玲玲,张宪洲,石培礼,等.青藏高原高寒草甸生态系统净二氧化碳交换量特征[J]. 生态学报,2005.25(8):1948~1952.
[10] 张宪洲,石培礼,刘允芬,等.青藏高原高寒草原生态系统土壤CO2 排放及其碳平衡[J].中国科学(D 辑)地球科学,2004, 34 (增刊Ⅱ): 193~199.
[11] 常天军,王建林,李鹏,等.藏北高寒草地植被的碳密度与碳贮量[J].生态科学,2007,26(5):422~427.
[12] 张虎,温娅丽,马力,等.祁连山北坡中部气候特征及垂直气候带的划分[J].山地学报, 2001,19(6): 497~502.
[13] 傅华,陈亚明,王彦荣,等.阿拉善主要草地类型土壤有机碳特征及其影响因素[J].生态学报, 2004.24(3): 469~476.
[14] 解宪丽,孙波,周慧珍,等.不同植被下中国土壤有机碳的储量与影响因子[J].土壤学报,2004, 41(2):687~699.
[15] 安尼瓦尔·买买提,杨元合,郭兆迪,等.新疆天山中段巴音布鲁克高山草地碳含量及其垂直分布[J].植物生态学报, 2006,30(4):545~552.
[16] 范宇,刘世全,张世熔,等. 西藏地区土壤表层和全剖面背景有机碳库及其空间分布[J].生态学报, 2006,26(9): 2834~2846.
[17] Burke I C,Yonker C M,Ponton W J,et al. Texture, climate and cultivation effects on soil organic matter content in U.S.[J]. Grassland soils. Soil Sci.Soc.Am.J.,1989,53:800-805.
[18] 何志斌,赵文智,刘鹄,等.祁连山青海云杉林斑表层土壤有机碳特征及其影响因素[J]. 生态学报,2006, 26(8): 2572~2577.
[19] 胡启武,欧阳华,刘贤德.祁连山北坡垂直带土壤碳氮分布特征[J].山地学报, 2006,24(6):654~661.
[20] 陈巧敏,吕萍萍,林如强.武夷山山地土壤垂直分异特征及其利用研究[J].甘肃农业,2006,(9):249.
[21] 展争艳,李小刚,张德罡,等.利用方式对高寒牧区土壤有机碳含量及土壤结构性质的影响[J].土壤学报,2005, 42(5):777~782.
[22] 张林,张世熔,李婷,等.雀儿山西南坡植被碳贮量估算及影响因素分析[J]. 四川环境,2007,26(1):27~32.
