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[1]向萍 张玲玲 罗先真 张桂华 张小倩 温达志**.镉污染下大气CO2升高和氮添加对森林土壤有机碳的影响[J].应用与环境生物学报,2022,28(06):1-12.[doi:10.19675/j.cnki.1006-687x.2021.09024]
 Xiang P ing,,et al.Effect of elevated atmospheric CO2 and nitrogen addition on forest soil organic carbon under Cd pollution[J].Chinese Journal of Applied & Environmental Biology,2022,28(06):1-12.[doi:10.19675/j.cnki.1006-687x.2021.09024]
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镉污染下大气CO2升高和氮添加对森林土壤有机碳的影响()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
28卷
期数:
2022年06期
页码:
1-12
栏目:
研究论文
出版日期:
2022-12-25

文章信息/Info

Title:
Effect of elevated atmospheric CO2 and nitrogen addition on forest soil organic carbon under Cd pollution
作者:
向萍123 张玲玲12 罗先真12 张桂华12 张小倩123 温达志12**
1 中国科学院华南植物园,中国科学院退化生态系统植被恢复与管理重点实验室 广州 510650
2 南方海洋科学与工程广东省实验室(广州)
Author(s):
Xiang P ing1 2 3 Zhang Lingling 1 2 Luo Xianzhen1 2 Zhang Guihua1 2 Zhang Xiaoqian1 2 3 Wen Dazhi1 2**
1 Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystem, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China
2 Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
3 University of Chinese Academy of Sciences, Beijing 100049 , China
关键词:
镉污染氮添加二氧化碳浓度升高土壤有机碳颗粒组分碳
Keywords:
cadmium nitrogen addition elevated carbon dioxide concentration soil organic carbon particulate carbon concentration
DOI:
10.19675/j.cnki.1006-687x.2021.09024
摘要:
以森林土为生长基质和开顶生长箱(Open-Top Chambers, OTCs)的近自然法,选择亚热带造林树种大叶相思(Acacia auriculiformis)、红锥(Castanopsis hystrix)、樟树(Cinnamomum camphora)、枫香(Liquidambar formosana)、海南蒲桃(Syzygium hainanense)的一年生树苗构建实验林,探讨了土壤有机碳对重金属镉(Cd)污染下大气二氧化碳(CO2)浓度升高和氮(N)添加的响应。实验处理如下:对照(CK)、加Cd(Cd)、加Cd加CO2(Cd + CO2)、加Cd加N(Cd + N)、加Cd加CO2加N(Cd + CO2 + N);加Cd为10 kg hm-2 a-1,加CO2浓度为700 μmol/mol,加N为100 kg hm-2 a-1;每个处理三个重复。实验始于2017年4月,2020年8月采集土壤样品并测定了土壤总有机碳库及其物理组分库。结果如下:(1)Cd添加抑制了土壤有机碳的积累,但CO2浓度升高和N添加能够缓解这种抑制作用,尤其在表层土壤(0-10 cm )中显著(P < 0.05)。(2)不同组分土壤总有机碳的回归分析发现,黏粒有机碳与土壤总有机碳之间的关系最为显著(P < 0.05),可用于评估重金属污染对土壤碳影响效果的重要指标之一。(3)土壤总有机碳与各组分碳的敏感性分析结果发现,在表层土壤(0-10 cm )中,粉粒有机碳最为敏感,敏感值为1.62,更能表征不同处理对于土壤有机碳的影响;在亚表层(10-30 cm )中,砂粒有机碳更为敏感,敏感值为2.03。本研究表明重金属Cd污染不利于土壤有机碳及颗粒组分碳的积累,大气CO2浓度升高和N添加则有利于土壤有机碳及其组分的增加。(图4 表3 参37)
Abstract:
In order to explore the response of soil organic carbon to atmospheric carbon dioxide (CO2) concentration and nitrogen (N) addition under cadmium (Cd) pollution, We established “experimental forests” by selecting five tree species ( Acacia auriculiformis, Castanopsis hystrix, Cinnamomum camphora, Liquidambar formosana, Syzygium hainanense, that are widely-used in afforestation, and by using forested soil as growth substrate in totally 15 open-top chambers (OTCs) to make the experimental condition as close to nature. The treatments were as follows: control (as indicated as CK), Cd addition (Cd), Cd addition and elevated CO2 (Cd + CO2), Cd and N addition (Cd + N), Cd addition plus elevated CO2 and N (Cd + CO2 + N); the rate of added Cd is as 10 kg h m-2 a-1, elevated CO2 as 700 μmol/mol, and N addition as 100 kg hm-2 a-1; each treatment had three replicates. The experimental treatment began in April 2017, and soil samples for the measurements of total soil organic carbon (SOC) concentration and its physical fractions were collected in August 2020. The results were as follows: (1) Solely Cd addition inhibited SOC accumulation, while elevated CO 2 and N addition alleviated this inhibition, especially significant (P < 0.05) in the surface soil (0-10 cm); (2) The regression analysis of SOC with its fractions indicated that clay organic carbon con centration that was most significantly correlated with SOC ( P < 0.05), could be used as an index to uate the effects of heavy metal pollution and its combinations with elevated CO2 and N on soil carbon; (3) Sensitivity analysis of carbon physical fractions showed in the surface soil (0-10 cm), silt organic carbon was the most sensitive, with a sensitivity value of 1.62, which could better characterize the effect of different treatments on soil organic carbon. In the subsurface layer (10-30 cm), sand organic carbon is more sensitive, with a sensitive value of 2.03. In conclusion, heavy metal Cd pollution was not conducive to the accumulation of soil organic carbon and its particulate fractions, while elevated atmospheric CO2 concentration and N addition benefited soil carbon storage.

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更新日期/Last Update: 2022-03-16