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蚯蚓介导下镉胁迫对土壤理化性质和玉米生长的影响

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禹明慧, 孟祥怀, 段昌群, 潘瑛, 秦媛儒, 岳敏慧, 王朋, 刘嫦娥. 蚯蚓介导下镉胁迫对土壤理化性质和玉米生长的影响[J]. 环境化学, 2020, (10): 2654-2665. doi: 10.7524/j.issn.0254-6108.2019071802
引用本文: 禹明慧, 孟祥怀, 段昌群, 潘瑛, 秦媛儒, 岳敏慧, 王朋, 刘嫦娥. 蚯蚓介导下镉胁迫对土壤理化性质和玉米生长的影响[J]. 环境化学, 2020, (10): 2654-2665. doi: 10.7524/j.issn.0254-6108.2019071802
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YU Minghui, MENG Xianghuai, DUAN Changqun, PAN Ying, QIN Yuanru, YUE Minhui, WANG Peng, LIU Change. Effects of cadmium stress on soil physical and chemical properties and maize growth mediated by earthworms[J]. Environmental Chemistry, 2020, (10): 2654-2665. doi: 10.7524/j.issn.0254-6108.2019071802
Citation: YU Minghui, MENG Xianghuai, DUAN Changqun, PAN Ying, QIN Yuanru, YUE Minhui, WANG Peng, LIU Change. Effects of cadmium stress on soil physical and chemical properties and maize growth mediated by earthworms[J]. Environmental Chemistry, 2020, (10): 2654-2665. doi: 10.7524/j.issn.0254-6108.2019071802
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蚯蚓介导下镉胁迫对土壤理化性质和玉米生长的影响

  • 1. 云南大学生态学与环境学院暨云南省高原山地生态与退化环境修复重点实验室, 昆明, 650091;

  • 2. 云南省高原湖泊生态修复及流域管理国际联合研究中心, 昆明, 650091;

  • 3. 云南生态文明建设智库, 昆明, 650091

    • 通讯作者: 刘嫦娥, E-mail: change@ynu.edu.cn
  • 基金项目:

    国家自然科学基金（31660169）和云南省科技计划重点研发项目（2018BC001，2018DG005）资助.

Effects of cadmium stress on soil physical and chemical properties and maize growth mediated by earthworms

  • 1. School of Ecology and Environmental Sciences&Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, Yunnan University, Kunming, 650091, China;

  • 2. International Cooperative Center of Plateau Lake Ecological Restoration and Watershed Management of Yunnan, Kunming, 650091, China;

  • 3. Yunnan Ecological Civilization Construction Think Tank, Kunming, 650091, China

    • Corresponding author: LIU Change, change@ynu.edu.cn
  • Fund Project: Supported by National Natural Science Foundation Project(31660169)and Key Research and Development Projects of Science and Technology of Yunnan Province(2018BC001,2018DG005).

  • 摘要: 为了探讨重金属如何驱动土壤动物的行为（垂直分布）进而影响土壤理化性质与作物生长，以赤子爱胜蚓为研究动物，利用室内模拟实验系统研究了镉胁迫下蚯蚓的生理响应、趋避行为及其对玉米生长的影响.结果表明，土壤镉污染影响了蚯蚓生理特征，总体上造成蚯蚓体内超氧化物歧化酶（SOD）活性下降而脂质过氧化产物（MDA）含量增加，这种不利效应导致蚯蚓作出了趋避响应，表现出向土壤深层分布的趋势.例如，处理第50 d，10 mg·kg-1和30 mg·kg-1镉处理组表层（0—10 cm）蚯蚓数量分别下降19.73%和22.17%，且其垂直分布与蚯蚓体内SOD活性显著负相关、与MDA含量显著正相关.蚯蚓垂直分布还改变了土壤有机质、碱解氮与速效磷含量，处理第50 d，30 mg·kg-1镉处理组土壤中有机质、碱解氮、速效磷含量较对照组分别增加29.24%、15.50%、17.37%，且与蚯蚓分布数量极显著正相关.此外，玉米生物量和株高与土壤碱解氮、有机质、速效磷含量之间显著正相关.因此，土壤镉胁迫改变了蚯蚓的垂直分布，其行为变化改善了深层土壤营养状况（植物根系主要分布区），促进了玉米苗的生长，本研究成果可为镉污染对土壤生态系统的生态风险性评价提供新的实验依据和数据支撑.
    Abstract: In order to explore the effects of heavy metals on behavior (vertical distribution) of soil animals and the subsequent indirect impacts on soil physical and chemical properties and plant growth, the present study used Eisenia foetida and maize as experimental animals and plant, respectively, to solve this problem. The results showed that cadmium affected physiological characteristics of earthworm individuals, such as generally reduced SOD activity but increased MDA content, which subsequently affected the distribution of earthworm, i.e., led to the number reducing of earthworm distributed in surface layer. The number of earthworms in surface layer decreased by 19.73% and 22.17% when the soil exposured to 10 mg·kg-1 and 30 mg·kg-1of cadmium on 50th day. Meanwhile, the proportion of of earthworm in vertical profiler was significantly and negatively correlated with SOD activity, but positively with MDA content.The changes in vertical distribution of earthworms further altered soil physical and chemical properties, such as led to increases in the contents of soil organic matter, alkali-hydrolyzed nitrogen and available phosphorus. By the end of the experiment, the contents of soil organic matter, alkali-hydrolyzed nitrogen and available phosphorus increased by 29.24%, 15.50% and 17.37% respectively under high level of cadmium pollution (30 mg·kg-1) compared with the control group. The contents of soil organic matter, alkali-hydrolyzed nitrogen and available phosphorus were positively correlated with the distribution of earthworms. Finally, the changes in soil nutrient content affected the growth of maize. The correlation analysis showed that maize biomass and height were positively correlated with the content of soil alkali-hydrolyzed nitrogen, organic matter and available phosphorus, respectively. The results showed that by affecting earthworm behavior, cadmiumcan further affected soil nutrient status and plant growth, which provided new evidence for the ecological consequences of cadmium pollution.
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  • [1] 陈卫平, 杨阳, 谢天, 等. 中国农田土壤重金属污染防治挑战与对策[J]. 土壤学报, 2018, 55(2):261-272.

    CHEN W P, YANG Y, XIE T, et al. Challenges and countermeasures for heavy metal pollution control in farmlands of China[J].Acta Pedologica Sinica, 2018, 55(2):261-272(in Chinese).

    [2] 陈奕云, 唐名阳, 王淑桃, 等. 基于文献计量的中国农田土壤重金属污染评价[J]. 土壤通报, 2016, 47(1):219-225.

    CHEN Y Y, TANG M Y, W S T, et al. Evaluation of heavy metal pollution in farm land soil of china based on bibliometrics[J]. Chinese Journal of Soil Science, 2016,47(1):219-225(in Chinese).

    [3] MORENA J L, HERNÁNDEZ T, GARCIA C. Effects of a cadmium-contaminated sewage sludge compost on dynamics of organic matter and microbial activity in an arid soil[J]. Biology and Fertility of Soils, 1999, 28(3):230-237.
    [4] 李勇, 黄占斌, 王文萍, 等. 重金属铅镉对玉米生长及土壤微生物的影响[J]. 农业环境科学学报, 2009, 28(11):2241-2245.

    LI Y, HUANG Z B, WANG W P, et al. Effects of heavy metals lead and cadimium on Zea mays L. growth and the soil microorganism[J]. Journal of Agro-Environment Science, 2009, 28(11):2241-2245(in Chinese).

    [5] 曾秀存, 许耀照, 张芬琴. 两种基因型龙葵对镉胁迫的生理响应及镉吸收差异[J]. 农业环境科学学报, 2012, 31(5):885-890.

    ZENG X C, XU Y Z, ZHANG F Q. Difference of cadmium absorption and physiological responses to cadmium stress in two different Solanum Nigrum[J]. Journal of Agro-Environment Science, 2012, 31(5):885-890(in Chinese).

    [6] 宇克莉, 邹婧, 邹金华. 镉胁迫对玉米幼苗抗氧化酶系统及矿质元素吸收的影响[J]. 农业环境科学学报, 2010, 29(6):1050-1056.

    YU K L,ZOU J,ZOU J H. Effects of cadmium stress on antioxidant enzyme system and absorption of mineral elements in maize seedlings[J].Journal of Agro-Environment Science, 2010, 29(6):1050-1056(in Chinese).

    [7] 周丽娜, 周静, 李辉信, 等. 镉对苯并(a)芘在蚯蚓亚细胞组分中分配积累的影响[J].生态学报,2017,37(19):6616-6623.

    ZHOU L N, ZHOU J, LI H X, et al. Effects of cadmium on the distribution and accumulation of Benzo(A)Pyrene in subcellular fractions of Eisenia Fetida[J]. Acta Ecologica Since, 2017,37(19):6616-6623(in Chinese).

    [8] 张慧琦, 王坤, 岳士忠, 等. 土壤镉污染对赤子爱胜蚓(Eisenia fetida)和加州腔蚓(Metaphire californica)体表角质层的影响[J].生态环境学报,2017, 26(10):1807-1813.

    ZHANG H Q, WANG K, YUE S Z, et al. The impact of soil cadmium on the ultrastructural cuticle of two earthworm species Eisenia fetida and Metaphire californica[J]. Ecology and Environmental Sciences, 2017, 26(10):1807-1813(in Chinese).

    [9] TYLKO G, BANACH Z, BOROWSKA J, et al. Elemental changes in the brain, muscle, and gut cells of the housefly, muscadomestica, exposed to heavy metals[J]. Microscopy Research Technique, 2005, 66(5):239-247.
    [10] STEBBING A R D. The stimulation of growth by low levels of inhibitors[J]. Science of the Total Environment, 1982, 22(3):213-234.
    [11] 孙贤斌, 刘红玉, 李玉成, 等. 重金属污染对土壤动物群落结构及空间分布的影响[J]. 应用生态学报, 2007, 18(9):2080-2084.

    SUN X B, LIU H Y, LI Y C, et al. Impact of heavy metals pollution on the community structure and spatial distribution of soil animals[J]. Chinese Journal of Applied Ecology, 2007, 18(9):2080-2084(in Chinese).

    [12] 王斌, 李根, 陈欢, 等. 蚯蚓作用下土壤化学组成和性状的动态变化[J]. 水土保持学报, 2013, 27(3):273-277.

    WANG B, LI G, CHEN H, et al. Dynamic variation of soil chemical composition and properties under the action of earthworms[J]. Journal of Soil and Water Conservation, 2013,27(3):273-277(in Chinese).

    [13] 王笑, 王帅, 滕明姣, 等. 两种代表性蚯蚓对设施菜地土壤微生物群落结构及理化性质的影响[J]. 生态学报, 2017, 37(15):5146-5156.

    WANG X, WANG S, TENG M J, et al. Impacts of two typical earthworms on soil microbial community structure and physicochemical properties in agreenhouse vegetable field[J]. Acta Ecologica Sinica, 2017, 37(15):5146-5156(in Chinese).

    [14] 徐坤, 刘雅心, 成杰民, 等. 蚯蚓对印度芥菜修复Zn、Pb污染土壤的影响[J]. 土壤通报, 2019, 50(1):203-210.

    XU K, LIU Y X, CHENG J M, et al. Effects of earthworms on the Phytoremediation of Indian Mustard for soil contaminated by Zn and Pb[J]. Chinese Journal of Soil Science, 2019, 50(1):203-210(in Chinese).

    [15] 黄福珍. 论蚯蚓对土壤结构形成及性态的影响[J]. 土壤学报, 1979(3):211-217. HUANG F Z. The influence of earthworm on the formation of soil structure[J]. Acta Pedologica Sinica, 1979

    (3):211-217(in Chinese).

    [16] 成杰民, 俞协治, 黄铭洪. 蚯蚓-菌根相互作用对Cd污染土壤中速效养分及植物生长的影响[J]. 农业环境科学学报, 2006, 25(3):685-689.

    CHENG J M, YU X Z, HUANG M H. Effect of earthworm-mycorrhiza interaction on available nutrients and ryegrass growth in Cd contaminated soil[J]. Journal of Agro-Environment Science, 2006, 25(3):685-689(in Chinese).

    [17] 蒋剑敏. 蚯蚓与土壤肥力[J]. 土壤, 1985, 17(4):3-15.

    JIANG J M. Earthworm and soil fertility[J]. Soils, 1985, 17(4):3-15(in Chinese).

    [18] WANG K, QIAOY H, ZHANG H Q, et al. Bioaccumulation of heavy metals in earthworms from field contaminated soil in a subtropical area of China[J]. Ecotoxicology and Environmental Safety, 2018, 14(8):876-883.
    [19] BERTRAND M, BAROT S, BLOUIN M, et al. Earthworm services for cropping systems. A review[J]. Agronomy for Sustainable Development, 2015, 35(2):553-567.
    [20] Organization for Economic Cooperation and Development. No. 207:Earthworm, Acute Toxicity Tests[M]. OECD Guidelines for the Testing of Chemicals, 1984:1-9.
    [21] 刘文丽, 徐冬梅, 刘惠君, 等. 异丙甲草胺对蚯蚓体重及酶活性的影响[J]. 环境科学学报, 2007, 27(12):2025-2031.

    LIU W L, XU D M, LIU H J, et al. Effects of metolachlor on the weight and enzyme activities of earthworms[J]. Acta Scientiae Circumstantiae, 2007,27(12):2025-2031(in Chinese).

    [22] 刘嫦娥, 段昌群, 王旭, 等. 丁草胺和乙草胺对蚯蚓CAT和SOD活性的影响[J]. 环境化学, 2008, 27(6):756-761.

    LIU C E, DUAN C Q, WANG X, et al. Effects of butachlor and acetochlor in soil on antioxidant enzymes (SOD And CAT) in earthworms (Eisenia fetida)[J]. Environmental Chemistry, 2008, 27(6):756-761(in Chinese).

    [23] 高岩, 骆永明. 蚯蚓对土壤污染的指示作用及其强化修复的潜力[J]. 土壤学报, 2005, 42(1):140-148.

    GAO Y, LUO Y M. Earthworms as bioindicators of soil pollution and their potential for remediation of contaminated soils[J]. Acta Pedologica Sinica, 2005, 42(1):140-148(in Chinese).

    [24] 郑丽萍, 王国庆, 林玉锁, 等. 贵州省典型矿区土壤重金属污染对蚯蚓的毒性效应评估[J]. 生态毒理学报,2015,10(2):258-265.

    ZHENG L P,WANG G Q,LIN Y S,et a1.Evaluation of toxicity effects of heavy metal contaminated soils on earthworm(Eisenia fetida)in a mining area of Guizhou Province[J].Asian Journal of Ecotoxicology,2015,l0(2):258-265(in Chinese).

    [25] 周东兴, 王晓, 宁玉翠, 等.镉胁迫对赤子爱胜蚓(Eisenia fetida)氧化应激反应影响[J].东北农业大学学报, 2017,48(2):59-68.

    ZHOU D X, WANG X, NING Y C, et a1. Effect of oxidative stress reaction for Eisenia fetida with exposure in Cd[J]. Journal of Northeast Agricultural University, 2017,48(2):59-68(in Chinese).

    [26] 刘丽艳, 宁玉翠, 邬欣慧, 等. 基于因子分析的Cd2+胁迫下赤子爱胜蚓氧化应激响应[J]. 生态学杂志,2017,36(7):1923-1932.

    LIU L Y, NING Y C, WU X H, et al. Oxidative response of earthworm Eisenia fetida to Cd2+ stress based on factor analysis[J]. Chinese Journal of Ecology,2017,36(7):1923-1932(in Chinese).

    [27] 元卿, 骆永明, 滕应, 等. 赤子爱胜蚓谷胱甘肽和丙二醛含量变化指示重金属污染土壤的生态毒性[J]. 土壤学报, 2008,45(4):616-621.

    BU Y Q,LUO Y M,TENG Y,et al. Variation of GSH and mdalevels in eisenia fetida as indicator of eco-toxicity of heavy metal contaminated soil[J].Acta Pedologica Sinica, 2008,45(4):616-621(in Chinese).

    [28] 薛银刚, 王晓蓉, 顾雪元, 等. 四溴双酚A对赤子爱胜蚓的急性毒性及抗氧化防御系统酶的影响[J]. 生态毒理学报, 2009, 4(1):93-100.

    XUE Y G,WANG X R,GU X Y,et al. Acute toxicity of Tetrabromobisphenol A to earthworms Eisenia fetida and its effects on antioxidant defense system enzymes[J]. Asian Journal of Ecotoxicology, 2009, 4(1):93-100(in Chinese).

    [29] JASMINE M C, JAMES M L M, Christoph S V, et al. Historical patterns of exotic earthworm distributions inform contemporary associations with soil physical and chemical factors across a northern temperate forest[J]. Soil Biology & Biochemistry, 2014,68:503-514.
    [30] SUTHAR S. Nutrient changes and biodynamics of epigeic earthworm Perionyx excavates (Pettier) daring recycling of some agriculture wastes[J]. Bioresource Technology, 2007, 98:1608-1614.
    [31] SHEEHAN C, KIRWAN L, CONNOLLY J, et a1. The effects of earthworm functional group diversity on nitrogen dynamics in soils[J]. Soil Biology & Biochemistry, 2006,38:2629-2636.
    [32] SCHEU S. Microbial activity and nutrient dynamics in earthworm casts(Lumbricidae)[J]. Biology and Fertility of Soils, 1987,5:230-234.
    [33] MEENA K, RENU B. Vonnitcdmology for sewage sludge recycling[J]. Journal of Hazardous Materials,2009,161:948-954.
    [34] 徐轶群, 城市生活污泥的蚯蚓堆肥特性及其对植物生长的影响[D]. 南京:南京农业大学, 2010. XU Y Q,Characterization of sewage sludge after vermicomposting and effect on plant growth[D]. Nanjing:Nanjing Agricultural University,2010(in Chinese).
    [35] BLAIR J M, PARMELEE R W, LAVELLE P. Influences of earthworms on biogeochemistry[M]. In:P.F.Hendrix, Eds,Earthworm ecology and biogeography in North America, Lewis, Boca Raton, FL, 1995:127-158.
    [36] IFTIKHAR A, MUHAMMAD J A, HAFIZ N A, et al. Differential effects of plant growth-promoting rhizobacteria on maize growth and cadmium uptake[J]. Plant Growth Regulation, 2016,35:303-315.
    [37] 张燕, 铁柏清, 刘孝利, 等. 玉米秸秆生物炭对水稻不同生育期吸收积累As、Cd的影响[J]. 生态环境学报, 2017, 26(3):500-505.

    ZHANG Y, TIE B Q, LIU X L, et al. Effects of corn stalk biochar on absorption and accumulation of arsenic and cadmium in rice at different growth stages[J]. Ecology and Environmental Sciences, 2017,26(3):500-505(in Chinese).

    [38] 刘柿良, 杨容孑, 潘远智, 等. 镉胁迫对长春花质膜过氧化、ATP酶及5'-核苷酸酶活性的影响[J]. 农业环境科学学报, 2013, 32(5):916-924.

    LIU S L, YANG R J, PAN Y Z, et al. Effects of cadmium on lipid peroxidation, ATPase and 5'-AMPase cctivity of cytomembrane in Catharanthus roseus Tissues[J]. Journal of Agro-Environment Science, 2013,32(5):916-924(in Chinese).

    [39] HU H, WANG L, WANG Q, et al. Photosynthesis, chlorophyll fluorescence characteristics, and chlorophyll content of soybean seedlings under combined stress of bisphenol A and cadmium[J]. Environmental Toxicology and Chemistry, 2014,33(11):2455-2462.
    [40] 王振中, 胡觉莲, 张友梅, 等. 湖南省清水塘工业区重金属污染对土壤动物群落生态影响的研究[J]. 地理科学, 1994, 14(1):64-72.

    WANG Z Z, HU J L, ZHANG Y M, et al. Influence of heavy metal pollution on soil animal community ecology in Qingshuitang area in Hunan[J]. Scientia Geographica Sinica, 1994, 14(1):64-72(in Chinese).

    [41] 高超, 李霁, 刘征涛, 等. 土壤铅镉铬暴露下赤子爱胜蚓的回避行为和急性毒性[J]. 环境科学研究, 2015, 28(10):1596-1601.

    GAO C,LI J,LIU Z T, et al. Avoidance behavior and acute toxicity of Eisenia fetida under exposure to lead,cadmium and chromium in soil[J]. Research of Environmental Sciences, 2015, 28(10):1596-1601(in Chinese).

    [42] CAPOWIEZ Y, STÉPHANE C, BOUCHANT P, et al. The effect of tillage type and cropping system on earthworm communities, macroporosity and water infiltration[J]. Soil and Tillage Research, 2009, 105(2):209-216.
    [43] TANG H, YAN Q, WANG X, et al. Earthworm (Eiseniafetida) behavioral and respiration responses to sublethal mercury concentrations in an artificial soil substrate[J]. Applied Soil Ecology, 2016,104:48-53.
    [44] DITTBRENNER N, MOSER I, TRIEBSKORN R, et al. Assessment of short and long-term effects of imidacloprid on the burrowing behaviour of two earthworm species (Aporrectodeacaliginosaand Lumbricusterrestris) by using 2D and 3D post-exposure techniques[J]. Chemosphere,September, 2011, 84(10):1349-1355.
    [45] DON A, STEINBERG B, SCHENING I, et al. Organic carbon sequestration in earthworm burrows[J]. Soil Biology & Biochemistry, 2008, 40(7):1803-1812.
    [46] CHUAN M C, SHU G Y, LIU J C. Solubility of heavy metals in a contaminated soil:Effects of redox potential and pH[J]. Water Air and Soil Pollution, 1996, 90(3/4):543-556.
    [47] YELINDA A, FLAVIO J. L, ELEUSA B. Effect of earthworm addition on soil nitrogen availability, microbial biomass and litter decomposition in mesocosms[J].Biol Fertil Soils, 2004, 39:146-152.
    [48] FRAZÃO J, DE GOEDE R G M, CAPOWIEZ Y, et al. Soil structure formation and organic matter distribution as affected by earthworm species interactions and crop residue placement[J]. Geoderma, 2019, 338(15):453-463.
    [49] BROWN G G. How do earthworms affect microfloral and faunal community diversity[J]. Plant and Soil, 1995, 170(1):209-231.
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禹明慧, 孟祥怀, 段昌群, 潘瑛, 秦媛儒, 岳敏慧, 王朋, 刘嫦娥. 蚯蚓介导下镉胁迫对土壤理化性质和玉米生长的影响[J]. 环境化学, 2020, (10): 2654-2665. doi: 10.7524/j.issn.0254-6108.2019071802
引用本文: 禹明慧, 孟祥怀, 段昌群, 潘瑛, 秦媛儒, 岳敏慧, 王朋, 刘嫦娥. 蚯蚓介导下镉胁迫对土壤理化性质和玉米生长的影响[J]. 环境化学, 2020, (10): 2654-2665. doi: 10.7524/j.issn.0254-6108.2019071802
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YU Minghui, MENG Xianghuai, DUAN Changqun, PAN Ying, QIN Yuanru, YUE Minhui, WANG Peng, LIU Change. Effects of cadmium stress on soil physical and chemical properties and maize growth mediated by earthworms[J]. Environmental Chemistry, 2020, (10): 2654-2665. doi: 10.7524/j.issn.0254-6108.2019071802
Citation: YU Minghui, MENG Xianghuai, DUAN Changqun, PAN Ying, QIN Yuanru, YUE Minhui, WANG Peng, LIU Change. Effects of cadmium stress on soil physical and chemical properties and maize growth mediated by earthworms[J]. Environmental Chemistry, 2020, (10): 2654-2665. doi: 10.7524/j.issn.0254-6108.2019071802
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蚯蚓介导下镉胁迫对土壤理化性质和玉米生长的影响

    通讯作者: 刘嫦娥, E-mail: change@ynu.edu.cn
  • 1. 云南大学生态学与环境学院暨云南省高原山地生态与退化环境修复重点实验室, 昆明, 650091;
  • 2. 云南省高原湖泊生态修复及流域管理国际联合研究中心, 昆明, 650091;
  • 3. 云南生态文明建设智库, 昆明, 650091
  • 收稿日期:  2019-07-18
基金项目:

国家自然科学基金（31660169）和云南省科技计划重点研发项目（2018BC001，2018DG005）资助.

摘要: 为了探讨重金属如何驱动土壤动物的行为（垂直分布）进而影响土壤理化性质与作物生长，以赤子爱胜蚓为研究动物，利用室内模拟实验系统研究了镉胁迫下蚯蚓的生理响应、趋避行为及其对玉米生长的影响.结果表明，土壤镉污染影响了蚯蚓生理特征，总体上造成蚯蚓体内超氧化物歧化酶（SOD）活性下降而脂质过氧化产物（MDA）含量增加，这种不利效应导致蚯蚓作出了趋避响应，表现出向土壤深层分布的趋势.例如，处理第50 d，10 mg·kg-1和30 mg·kg-1镉处理组表层（0—10 cm）蚯蚓数量分别下降19.73%和22.17%，且其垂直分布与蚯蚓体内SOD活性显著负相关、与MDA含量显著正相关.蚯蚓垂直分布还改变了土壤有机质、碱解氮与速效磷含量，处理第50 d，30 mg·kg-1镉处理组土壤中有机质、碱解氮、速效磷含量较对照组分别增加29.24%、15.50%、17.37%，且与蚯蚓分布数量极显著正相关.此外，玉米生物量和株高与土壤碱解氮、有机质、速效磷含量之间显著正相关.因此，土壤镉胁迫改变了蚯蚓的垂直分布，其行为变化改善了深层土壤营养状况（植物根系主要分布区），促进了玉米苗的生长，本研究成果可为镉污染对土壤生态系统的生态风险性评价提供新的实验依据和数据支撑.

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