不同土地利用方式土壤有机碳变化特征及与重金属的相关性分析
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摘要
研究旨在探讨土地利用方式对土壤碳库储量的影响,以及不同土地利用方式土壤典型重金属与SOC储量之间的关系。采用现场分层采样(表、中、深层)及室内计算分析,调查了甘肃中西部12个市县区,不同土地利用方式下土壤有机碳(SOC)储量变化特征,同时通过引入有机碳丰度值和相关系数,初步阐明了土壤重金属与SOC变化之间的相关性。结果得出:调查区内土壤有机碳丰度值呈现出的大小顺序为林地、建设用地、园地、耕地和草地;此外,典型土壤重金属Hg、Cd、Cr、As、Pb与SOC储量之间存在显著相关性,园地和建设用地最高r=0.99,林地和耕地次之,分别为r=0.87和r=0.86。可见,土壤在不同开发利用方式下,有机碳储量及有机碳丰度值呈现出较大差异性,同时也定量证明了SOC与土壤典型重金属储量密切相关。
The study is to explore the correlation between land use patterns and soil carbon pool, soil heavy metals and SOC under different land use patterns. Through stratified sampling(topsoil, middle-level soil and deep soil) and in-door computational analysis, the variation characteristics of SOC reserves under different land use types in 12 cities and counties of central and western Gansu were investigated. The index of soil organic abundance and correlation coefficient were introduced to clarify the correlation between soil heavy metals and SOC. The results showed that, the order of soil organic abundance value was forest>land for construction> garden plot>cultivated land> lawn; besides, the correlation of SOC and 5 typical heavy metals(Hg, Cd, Cr, As and Pb) was significant, garden and the land for construction had the highest r of 0.99,the forest and the cultivated land took the second place, with r=0.87 and r=0.86 respectively. In conclusion,land use patters influence SOC reserves, and the quantitative analysis indicate that the soil heavy metal reserves are closely related to organic carbon contents.
The study is to explore the correlation between land use patterns and soil carbon pool, soil heavy metals and SOC under different land use patterns. Through stratified sampling(topsoil, middle-level soil and deep soil) and in-door computational analysis, the variation characteristics of SOC reserves under different land use types in 12 cities and counties of central and western Gansu were investigated. The index of soil organic abundance and correlation coefficient were introduced to clarify the correlation between soil heavy metals and SOC. The results showed that, the order of soil organic abundance value was forest>land for construction> garden plot>cultivated land> lawn; besides, the correlation of SOC and 5 typical heavy metals(Hg, Cd, Cr, As and Pb) was significant, garden and the land for construction had the highest r of 0.99,the forest and the cultivated land took the second place, with r=0.87 and r=0.86 respectively. In conclusion,land use patters influence SOC reserves, and the quantitative analysis indicate that the soil heavy metal reserves are closely related to organic carbon contents.
引文
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[20]孙慧,毕如田,郭颖,等.广东省土壤重金属溯源及污染源解析[J].环境科学学报,2018,38(2):704-714.
[21]刘沙沙,付建平,蔡信德,等.重金属污染对土壤微生物生态特征的影响研究进展[J].生态环境学报,2018,27(6):1173-1178.
[22]袁冬海,崔骏,洪志强,等.白洋淀沉水植物腐解溶解性有机物与重金属的相互作用[J].环境工程学报,2016(5):32-40.
[23] Badr A, Mohamed, Naoko Ellis, et al. The role of tail biochar in increasing plant growth, and reducing bioavailability, phytotoxicity,and uptake of heavy metals in contaminated soil[J].Environmental Pollution,2017,230:329-338.
[24]阳利永,渠甲源,吴献花.不同土地利用方式对土壤养分的影响[J].安徽农业科学,2012,40(18):9693-9696.
[25]马芊红,张光辉,耿韧,等.我国东部水蚀区坡耕地土壤质量现状分析[J].中国水土保持科学,2017(3):36-42.
[2] Duiker S W. Crop residue and tillage effects on carbon sequestration in a Luvisol in central Ohio[J].Soil Tillage Res,1999,52:73-81.
[3] Gao Xuejie, Shi Ying, Filippo Giorgi. A high resolution simulation of climate change over China[J].Science in China:Series D,2010,54(3):462-472.
[4]朱锡明,韩春爽,娄玉杰,等.土壤有机碳稳定性的影响[J].中国农学通报,2014,30(21):29-34.
[5]陈富荣,梁红霞,邢润华,等.安徽省土壤固碳潜力及有机碳汇(源)研究[J].土壤通报,2017,04
[6]王岩松,李梦迪,朱连奇.土壤有机碳库及其影响因素的研究进展[J].中国农学通报,2015,31(32):123-131.
[7]洪坚平.土壤污染与防治第三版[M].北京:中国农业出版社,2015:33-34.
[8]王晓峰,张磊.有机污染土壤的微生物修复研究进展[J].中国农学通报,2013,29(2):125-132.
[9]余健,房莉,卞正富,等.土壤碳库构成研究进展[J].生态学报,2014,34(17):4829-4838.
[10]胡红青,黄益宗,黄巧云,等.农田土壤重金属污染化学钝化修复研究进展[J].植物营养与肥料学报,2017,23(6):1676-1685.
[11] G Conti, E Kowaljow, F Baptist, et al. Altered soil carbon dynamics under different land-use regimes in subtropical seasonally-dry forests of central Argentina[J].Plant and Soil,2016,403(1-2):375-387.
[12] Sun Xin, Ning Ping, Tang Xiaolong, et al. Heavy metals migration in soil in tailing dam region of Shuikoushan, Hunan Provinve, China[J].Procedia Environmental Science,2012(16):758-763.
[13]倪九派,袁道先,谢德体,等.重庆岩溶区土壤有机碳库的估算及其空间分布特征[J].生态学报,2009,29(11):6292-6301.
[14]李桂林,陈杰,檀满枝.苏州市非农用地扩张对土壤资源影响的时空特征[J].自然资源学报,2008(4):674-684.
[15]戴万宏. Relation of soil organic carbon to climate and site variables in China[C]//现代农业理论与实践——安徽现代农业博士科技论坛论文集.安徽:安徽大学出版社,2007,11.
[16]钱春香,王明明,许燕波.土壤重金属污染现状及微生物修复技术研究进展[J].东南大学学报:自然科学版,2013,43(3):669-674.
[17] Li Jianguo, Pu Lijie, Liao Qilin, et al. How anthropogenic activities affect soil heavy metal concentration on a broad scale a geochemistry survey in Yangtze River Delta[J]. Eastern China,Environ Earth Sci,2015(73):1823-1835.
[18] DAI Bin, LüJian-shu, ZHAN Jin-cheng, et al. Assessment of Sources, Spatial Distribution and Ecological Risk of Heavy Metals in Soils in a Typical Industry-based City of Shandong Province,Eastern China[J].Environmental Science,2015,36(2):507-515.
[19]朱红梅,李国华,崔静,等.重金属铅对土壤微生物活性的影响[J].南京农业大学学报,2011,34(6):125-128.
[20]孙慧,毕如田,郭颖,等.广东省土壤重金属溯源及污染源解析[J].环境科学学报,2018,38(2):704-714.
[21]刘沙沙,付建平,蔡信德,等.重金属污染对土壤微生物生态特征的影响研究进展[J].生态环境学报,2018,27(6):1173-1178.
[22]袁冬海,崔骏,洪志强,等.白洋淀沉水植物腐解溶解性有机物与重金属的相互作用[J].环境工程学报,2016(5):32-40.
[23] Badr A, Mohamed, Naoko Ellis, et al. The role of tail biochar in increasing plant growth, and reducing bioavailability, phytotoxicity,and uptake of heavy metals in contaminated soil[J].Environmental Pollution,2017,230:329-338.
[24]阳利永,渠甲源,吴献花.不同土地利用方式对土壤养分的影响[J].安徽农业科学,2012,40(18):9693-9696.
[25]马芊红,张光辉,耿韧,等.我国东部水蚀区坡耕地土壤质量现状分析[J].中国水土保持科学,2017(3):36-42.