干旱区生态环境知识资源中心(Arid): 祁连山中部土壤颗粒组分有机质碳含量及其与海拔和植被的关系

Arid

	祁连山中部土壤颗粒组分有机质碳含量及其与海拔和植被的关系
其他题名	The soil particulate organic carbon in different elevation and its relationship with vegetation in Qilian Mountain
	吴建国 1; 艾丽 1; 田自强 1; 常学向 2
ISSN	1672-2175
出版年	2008
卷号	17 期号:6 页码:2358-2365
中文摘要	调查分析了祁连山中段不同海拔土壤颗粒有机碳及其与植被的关系。结果显示,土壤颗粒组分比例在015cm和1535cm土层随海拔升高而呈现下降趋势(P>0.2);土壤颗粒有机碳比例在015cm土层随海拔升高也呈现下降趋势(P≤0.001)。土壤颗粒组分比例015cm土层在阴坡3000m3500m、1535cm土层在阴坡3200m和3500m及半阴坡2200和2800m处较高;土壤颗粒有机碳比例015cm土层在阴坡3000m和3200m、半阴坡2200m和2800m,以及1535cm土层在阴坡3200m和3500m、阳坡3300m和3500m处较高(P<0.05)。土壤颗粒有机碳和颗粒组分碳含量随海拔升高变化不显著(P<0.9)。土壤颗粒有机碳含量015cm土层在阴坡3000m3500m、1535cm土层在阴坡3000m3500m及阳坡3300m处较高;土壤颗粒组分碳含量015cm土层在阴坡3000m3400m和阳坡3300m,以及1535cm土层在阴坡3200m和3400m及阳坡3300m处较高。土壤颗粒组分比例015cm土层在森林和灌丛草甸中较高;1535cm土层在森林、灌丛草甸和干旱草原中较高(P<0.05)。土壤颗粒有机碳比例015cm土层在荒漠草原和干旱草原,以及1530cm土层在森林和灌丛草甸中较高(P<0.05)。土壤颗粒组分碳含量015cm和1535cm土层在森林和灌丛草甸中较高(P<0.05)。土壤颗粒有机碳含量015cm和1535cm土层在森林中最高(P<0.05)。土壤颗粒组分碳含量和颗粒有机碳含量与土壤有机碳含量有显著的正相关性(P<0.001),土壤颗粒有机碳含量与颗粒组分碳含量也有显著的正相关性(P<0.001),土壤颗粒组分比例与有机碳含量相关性不显著(P=0.15),土壤颗粒有机碳含量与颗粒组分比例有显著正相关性(P<0.005)。结果说明祁连山中部北坡土壤有机碳稳定性受植被和海拔共同影响,荒漠草原和干旱草原表层土壤有机碳稳定性较低,森林和灌丛草甸土壤中非保护性碳含量较高。
英文摘要	The soil particulate organic matter-carbon (POC) is the unprotected pool of soil organic carbon (SOC) and it would indi- cate the stabilization of SOC. The Qilian mountain located the northern border of Qinghai-Tibet plateau with different vegetation and soil type, the SOC under these vegetations would be changed with change in climate or human being activities, and the SOC with different stabilization would be changed differently by the disturbance. To know the different stabilization of SOC under different altitude and vegetation of this mountain for understanding the impacts of climate change on the alpine ecosystem carbon sink, the POC in different elevation and its relationship with vegetation in Qi Lian Mountain was investigated. The results showed that the ratio of soil particulate fraction decreased with increasing elevation in 015 cm and 1535 cm soil depth(P>0.2), and the ratio of POC in 015 cm soil depth decreased with increasing elevation(P≤0.001), while it increased with increasing elevation in 1530 cm soil depth(P>0.5). Soil particulate fraction in 015 cm soil depth under 3 000 m~3 500 m of shady slope or which in 1535 cm soil depth under 3 200 m or 3 500 m of shady slope or 2 200 m~2 800 m was the highest among different altitudes(P<0.05), and the ratio of POC in 015 cm soil depth under 3 000 m and 3 200 m of shady slope or 2 200 m and 2 800 m, or that in 1535 cm soil depth under 3 200 m and 3 500 m of shady slope or 3 300 m and 3 500 m of sunny slope was also the highest under different alti- tudes(P<0.05). The POC and the carbon content of soil particulate fraction both did not significantly increase with increasing alti- tudes (P<0.9). The difference of the carbon content of soil particulate fraction between 015 cm and 1535 cm soil depth under dif- ferent altitudes except 2 200m 2 800 m or 3 000 m of shady slope or 3 600 m of sunny slope was not significant (P<0.05). The con- tent of POC in 015 cm under 3 000 m3 500 m of shady slope or that in 1535 cm under 3 000 m3 500 m of shady slope or 3300m of sunny slope, and the carbon content of particulate fraction in 015cm soil depth under 3 0003 400 m of shady slope and 3 300 m of sunny slope or that in 1535 cm under 3 200 m and 3 400 m of shady slope and 3 300 m of sunny slope were the highest among different altitudes(P<0.05). The ratio of soil particulate fraction in 015 cm soil depth under forest and shrub alpine meadows were the highest and the difference of this ratio between under forest and shrub meadows or desert steppe and arid steppe was not significant (P<0.05), and that in 1535 cm soil depth under forest and shrub meadows or arid steppe was the highest among different vegetations (P<0.05). The ratio of POC in 015 cm soil depth under desert steppe and arid steppe or that in 1535 cm soil depth under forest and shrub meadows was also the highest among different vegetations (P<0.05). The carbon content of soil particulate fraction in 015 cm and 1535 cm soil depth under forest and shrub meadows was the highest, and that under desert steppe was the lowest among different vegetations (P<0.05). The POC content in 015 cm and 1535 cm soil depth under forest was the highest among different vegetations (P<0.05), while that between under alpine meadows and arid steppe or desert steppe was not significant (P<0.05). The carbon content of particulate fraction and POC content were significantly positively related to SOC content(P<0.001), and POC content was also significantly positively related to carbon content of particulate fraction (P<0.001),while soil particulate fraction ratio was not significantly positively related to SOC content(P≤0.15). Additionally, the POC content was also significantly positively related to ratio of soil particulate fraction (P<0.005). The results showed that the altitude and vegetation together influ- enced the stabilization of SOC and the stabilization of SOC under arid steppe or desert steppe was lower than that under alpine meadows, while the content of unprotected SOC was higher under forest and shrub meadows than that under other vegetations.
中文关键词	土壤有机碳 ; 颗粒有机碳 ; 祁连山
英文关键词	soil organic carbon particulate organic carbon Qilian mountain
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:3456873
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/222657
作者单位	1.中国环境科学研究院, 北京 100012, 中国; 2.中国科学院寒区旱区环境与工程研究所, 兰州, 甘肃 734000, 中国
推荐引用方式 GB/T 7714	吴建国,艾丽,田自强,等. 祁连山中部土壤颗粒组分有机质碳含量及其与海拔和植被的关系[J]. 中国科学院西北生态环境资源研究院,2008,17(6):2358-2365.
APA	吴建国,艾丽,田自强,&常学向.(2008).祁连山中部土壤颗粒组分有机质碳含量及其与海拔和植被的关系.,17(6),2358-2365.
MLA	吴建国,et al."祁连山中部土壤颗粒组分有机质碳含量及其与海拔和植被的关系".17.6(2008):2358-2365.