土壤易氧化有机碳对西双版纳热带森林群落演替的响应
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摘要
土壤易氧化有机碳(Readily oxidizable carbon,ROC)作为土壤中易被氧化且活性较高的有机碳,能够敏感反映群落植被环境与土壤环境的早期变化。为探明土壤ROC时空变化对热带森林次生演替的响应,以西双版纳热带森林不同次生演替阶段(白背桐群落、野芭蕉群落与崖豆藤群落)为研究对象,采用高锰酸钾氧化法测定并分析土壤ROC时空动态特征,探究这些变化与土壤微生物量碳及理化性质之间的相互关系。结果表明:(1)不同次生演替阶段热带森林土壤ROC含量存在显著差异,其大小顺序为:野芭蕉群落(11.38 mg/g)>崖豆藤群落(10.5 mg/g)>白背桐群落(9.72 mg/g);(2)不同次生演替阶段热带森林土壤ROC含量的月份变化趋势基本一致,均表现为6月显著高于12月,且各月份间差异显著;(3)不同次生演替阶段热带森林土壤ROC含量随着土层深度增加而递减,且不同土层间差异显著;(4)土壤有机碳、微生物量碳、全氮、水解氮和铵态氮显著影响土壤ROC含量的时空变化,而pH值与土壤ROC显著负相关。因此,土壤ROC对西双版纳热带森林群落演替具有敏感的响应,土壤总有机碳、微生物量碳、全氮、水解氮、铵态氮及pH是土壤ROC时空变化的主控因素。
Readily oxidizable carbon(ROC) is of the most easily oxidized and sensitive carbons in soil, and sensitively responds to early environment changes in plants and soils. This study aimed to understand the spatiotemporal dynamics response of soil ROC to secondary succession in tropical forests. The spatiotemporal variation in soil ROC was measured by potassium permanganate oxidation; the relationship of soil ROC to soil microbial carbon and physiochemical properties in three secondary succession stages(Mallotus paniculatus, Musa acuminata, and Mellettia leptobotrya) of Xishuangbanna tropical forests was also analyzed. The results were as follows:(1) Soil ROC varied significantly across the three succession stages(P < 0.05), in the order of M. leptobotrya > M. acuminatan > M. paniculatus;(2) the ROC concentration had similar monthly variations in the three succession stages, with higher values observed in March and June, and lower values in September and December;(3) the ROC concentration significantly decreased down through the soil profile in the three secondary succession stages.(4) The spatiotemporal variation in soil ROC was positively affected by the soil organic carbon, microbial carbon, total nitrogen, hydrolyzable nitrogen, and NH~+_4-N, whereas the soil ROC was negatively correlated with pH. We can conclude that soil ROC can sensitively respond to community succession in Xishuangbanna tropical forests. The spatiotemporal variation in soil ROC was attributed to the changes in factors(soil organic carbon, microbial carbon, total nitrogen, hydrolyzable nitrogen, ammonium nitrogen and soil pH) during the succession processes in Xishuangbanna tropical forests.
Readily oxidizable carbon(ROC) is of the most easily oxidized and sensitive carbons in soil, and sensitively responds to early environment changes in plants and soils. This study aimed to understand the spatiotemporal dynamics response of soil ROC to secondary succession in tropical forests. The spatiotemporal variation in soil ROC was measured by potassium permanganate oxidation; the relationship of soil ROC to soil microbial carbon and physiochemical properties in three secondary succession stages(Mallotus paniculatus, Musa acuminata, and Mellettia leptobotrya) of Xishuangbanna tropical forests was also analyzed. The results were as follows:(1) Soil ROC varied significantly across the three succession stages(P < 0.05), in the order of M. leptobotrya > M. acuminatan > M. paniculatus;(2) the ROC concentration had similar monthly variations in the three succession stages, with higher values observed in March and June, and lower values in September and December;(3) the ROC concentration significantly decreased down through the soil profile in the three secondary succession stages.(4) The spatiotemporal variation in soil ROC was positively affected by the soil organic carbon, microbial carbon, total nitrogen, hydrolyzable nitrogen, and NH~+_4-N, whereas the soil ROC was negatively correlated with pH. We can conclude that soil ROC can sensitively respond to community succession in Xishuangbanna tropical forests. The spatiotemporal variation in soil ROC was attributed to the changes in factors(soil organic carbon, microbial carbon, total nitrogen, hydrolyzable nitrogen, ammonium nitrogen and soil pH) during the succession processes in Xishuangbanna tropical forests.
引文
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[4] 刘留辉,邢世和,高承芳,崔纪超,魏多落,胡争辉,卢超.国内外土壤碳储量研究进展和存在问题及展望.土壤通报,2009,40(3):697- 700.
[5] 袁知洋,邓邦良,刘宇新,李志,牛德奎,郭晓敏.武功山草甸植被小群落土壤活性有机碳与土壤养分的典型相关分析.中南林业科技大学学报,2016,36(2):84- 90.
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[7] 王莹,阮宏华,黄亮亮,冯育青,齐艳.围湖造田不同土地利用方式土壤有机碳和易氧化碳.生态环境学报,2010,19(4):913- 918.
[8] 王艳,杨丽娟,周崇峻,储慧霞.长期施肥对设施蔬菜栽培土壤易氧化有机碳含量及其剖面分布的影响.水土保持通报,2010,30(4):32- 35.
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[10] 刘敏,杨永锋,刘国顺,可钰,陈红丽,何春莉.不同有机物料配施化肥对植烟土壤不同形态有机碳的影响.土壤通报,2017,48(4):901- 907.
[11] 涂利华,胡庭兴,张健,李仁洪,何远洋,田祥宇,肖银龙,景建飞.模拟氮沉降对华西雨屏区慈竹林土壤活性有机碳库和根生物量的影响.生态学报,2010,30(9):2286- 2294.
[12] 刘荣杰,吴亚丛,张英,李正才,马少杰,王斌,格日乐图.中国北亚热带天然次生林与杉木人工林土壤活性有机碳库的比较.植物生态学报,2012,36(5):431- 437.
[13] 贾重建,刘红宜,卢瑛,陈冲,熊凡,崔启超.土地利用方式对土壤有机碳和团聚体组分特征的影响.热带地理,2014,34(5):681- 689.
[14] 张玲,张东来,毛子军.小兴安岭阔叶红松林不同演替系列土壤有机碳及各组分特征.林业科学,2017,53(9):11- 17.
[15] 徐侠,王丰,栾以玲,汪家社,方燕鸿,阮宏华.武夷山不同海拔植被土壤易氧化碳.生态学杂志,2008,27(7):1115- 1121.
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[17] Zhang M,Zhang X K,Liang W J,Jiang Y,Dai G H,Wang X C,Han S J.Distribution of soil organic carbon fractions along the altitudinal gradient in Changbai Mountain,china.Pedosphere,2011,21(5):615- 620.
[18] 陈果,刘岳燕,姚槐应,黄昌勇.一种测定淹水土壤中微生物生物量碳的方法:液氯熏蒸浸提—水浴法.土壤学报,2006,43(6):981- 988.
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[20] 耿玉清,余新晓,岳永杰,李金海,张国桢,刘松.北京山地针叶林与阔叶林土壤活性有机碳库的研究.北京林业大学学报,2009,31(5):19- 24.
[21] 张雪,韩士杰,王树起,谷越,岳琳艳,冯月,耿世聪,陈志杰.长白山白桦林不同演替阶段土壤有机碳组分的变化.生态学杂志,2016,35(2):282- 289.
[22] 刘明慧,孙雪,于文杰,秦立武,冯富娟.长白山不同海拔原始红松林土壤活性有机碳含量的生长季动态.南京林业大学学报:自然科学版,2018,42(2):67- 74.
[23] 石亚攀,陈立新,段文标,张雪,徐非,刘晓锐.红松针阔混交林林隙土壤总有机碳和易氧化有机碳的时空异质性研究.水土保持学报,2013,27(6):186- 192.
[24] 辜翔,张仕吉,项文化,李雷达,刘兆丹,孙伟军,方晰.中亚热带4种森林类型土壤活性有机碳的季节动态特征.植物生态学报,2016,40(10):1064- 1076.
[25] 徐秋芳.森林土壤活性有机碳库的研究[D].杭州:浙江大学,2004,36-37.
[26] 张剑,汪思龙,王清奎,刘燕新.不同森林植被下土壤活性有机碳含量及其季节变化.中国生态农业学报,2009,17(1):41- 47.
[27] 张海东,于东升,王宁,史学正,宋正姗,顾成军.植被恢复过程中侵蚀红壤有机质变化研究.土壤,2013,45(5):856- 861.
[28] 朱丽琴,黄荣珍,段洪浪,贾龙,王赫,黄诗华,易志强,张文锋.红壤侵蚀地不同人工恢复林对土壤总有机碳和活性有机碳的影响.生态学报,2017,37(1):249- 257.
[29] 张俊华,丁维新,孟磊.海南热带橡胶园土壤易氧化有机碳空间变异特征研究.生态环境学报,2010,19(11):2563- 2567.
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