干旱区土壤碳库是全球碳库的重要组成部分,在全球碳循环中起着重要作用.本文根据干旱区土壤相关数据资料,分析土壤有机碳与土壤理化性质相关性,为干旱区碳循环提供理论依据.结果表明:土壤有机碳含量与土壤营养成分和交换性阳离子含量呈显著正相关,与土壤pH值和容重呈显著负相关.此外,干旱区土壤也存在相当比例的无机碳,土壤有机碳和无机碳含量呈显著负相关,二者间关系还需要结合母质、生物气候条件、人类活动影响进行进一步说明.
The organic carbon (SOC) and inorganic carbon (SIC) compose of soil carbon in terrestrial ecosystems, the amount of SIC in the earth surface is about half of the SOC amount (1 500 Pg), showing that its played important role in global carbon balance, but at present more studies were on the SOC compared to SIC. The determination of the relation in SOC and soil physical-chemical is meaningful and necessary for assessing carbon sequestration. In order to analyses the relationship among soil physical-chemical properties and SOC content, the data from Xinjiang Autonomous Region in northwestern China was collected, and analyzed using correlation and regression method. The finding is that, the SOC has significantly positive correlations with soil nutrients, cation exchange capacity, while soil pH and bulk density has significantly negative correlation with SOC. In addition, SOC and SIC was inversely related. These findings suggest that the processes governing the dynamics of SOC is complex. The differ among eco-regions and strongly interact in land use, farming systems and farming management practices. There are few reliable estimates of the SOC content and SIC content in the soils. Therefore, in the future, we should pay more attention to the relation between SOC and SIC.
[1] Schimel D S.Terrestrial ecosystems and the carbon cycle[J].Global Change Biology,1995,1(1):77-91.
[2] 潘根兴.中国土壤有机碳和无机碳库量研究[J].科技通报,1999,15(5):330-332.
[3] 潘根兴,李恋卿,张旭辉,等.中国土壤有机碳库量与农业土壤碳固定动态的若干问题[J].地球科学进展,2003,18(4):609-618.
[4] 房飞,胡玉昆,公延明,等.荒漠土壤微生物碳垂直分布规律对有机碳库的表征作用[J].中国沙漠,2013,33(3):777-781.
[5] 崔永琴,马剑英,刘小宁,等.人类活动对土壤有机碳库的影响研究进展[J].中国沙漠,2011,31(2):407-414.
[6] 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.
[7] 王文艳,张丽萍,刘俏.黄土高原小流域土壤阳离子交换量分布特征及影响因子[J].水土保持学报,2012,26(5):123-127.
[8] 王清奎,汪思龙,冯宗炜,等.土壤活性有机质及其与土壤质量的关系[J].生态学报,2005,25(3):513-519.
[9] 耿元波,罗光强,袁国富,等.农垦及放牧对温带半干旱草原土壤碳素的影响[J].农业环境科学学报,2008,27(6):2518-2523.
[10] 杨黎芳,李贵桐,赵小蓉,等.栗钙土不同土地利用方式下有机碳和无机碳剖面分布特征[J].生态环境,2007,16(1):158-162.
[11] 张雪妮,吕光辉,贡璐,等.新疆艾比湖湿地自然保护区不同土壤类型无机碳分布特征[J].中国沙漠,2013,33(4):1084-1090.
[12] 陈曦.中国干旱区自然地理[M].北京:科学出版社,2009.
[13] 新疆维吾尔族自治区土壤普查办公室.新疆土壤[M].北京:科学出版社,1996.
[14] 张勇,秦嘉海,赵芸晨,等.黑河上游冰沟流域不同林地土壤理化性质及有机碳和养分的剖面变化规律[J].水土保持学报,2013,27(2):126-130.
[15] 张春华,王宗明,居为民,等.松嫩平原玉米带土壤碳氮比的时空变异特征[J].环境科学,2011,32(5):1407-1414.
[16] 荣井荣,李晨华,王玉刚,等.长期施肥对绿洲农田土壤有机碳和无机碳的影响[J].干旱区研究,2012,29(4):592-597.
[17] Pan G X,Tao Y X,Shun Y H,et al.Some features of carbon cycles in karst system and the implication for Epikarstification-an example of Yaji Karst Experimental Site in Guilin,China[J].The Journal of Chinese Geography,1997,7(3):48-57.
[18] 杨忠芳,夏学齐,余涛,等.内蒙古中北部土壤碳库构成及其影响因素[J].地学前缘,2011,18(6):1-10.
[19] 潘根兴.中国干旱性地区土壤发生性碳酸盐及其在陆地系统碳转移上的意义[J].南京农业大学学报,1999,22(1):52-57.
[20] 涂夏明,曹军骥,韩永明,等.黄土高原表土有机碳和无机碳的空间分布及碳储量[J].干旱区资源环境,2012,26(2):114-118.
[21] 祖元刚,李冉,王文杰,等.我国东北土壤有机碳、无机碳含量与土壤理化性质的相关性[J].生态学报,2011,31(18):5207-5216.
[22] 杨荣,苏永中,王敏,等.新垦沙地农田土壤有机碳时空变异特征[J].中国沙漠,2013,33(4):1078-1083.
[23] Yang Y H,Fang J Y,Ma W H,et al.Soil carbon stock and its changes in northern China's grasslands from 1980s to 2000s[J].Global Change Biology,16,3036-3047.
[24] 王绍强,周成虎,李克让,等.中国土壤有机碳库及空间分布特征分析[J].地理学报,2000,55(5):533-544.
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