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GEOGRAPHICAL RESEARCH >

2007 , Vol. 26 >Issue 3: 491 - 499

DOI: https://doi.org/10.11821/yj2007030009

Earth Surface Processes

Studies on decomposition of fine roots of Castanopsis carlesii and Cunninghamia lanceolatain Wanmulin Natural Reserve, Fujian province (1.Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101,China|2.College of Geography Science, Fujian Normal University, Fuzhou 350012, China|3.Graduate School of the Chinese Academy of Sciences, Beijing 100039, China )

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Received date: 2006-08-06

  Revised date: 2007-01-16

  Online published: 2007-05-25

Supported by

国家自然科学基金资助项目(40501072,30170770);高等学校优秀青年教师教学科研奖励计划资助项目;中国科学院知识创新重大项目(KZCXI-SW-01-04);国家重点基础研究发展规划项目(2002CB412503);中国科学院地理科学与资源研究所知识创新项目(CXIOG-E01-03-03)

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Abstract

Decomposition of fine roots plays an important role in carbon turnover and nutrients cycling in forest ecosystems. To date, several methods have been suggested to study the decomposing process of fine roots: (1) litterbag; (2) intact soil core; (3) minirhizotrons and so on. The method of litterbag is commonly used worldwide for researching on the process of decomposition of fine roots, and its primary disadvantage is strongly disturbing in situ conditions which may result in an underestimation of decomposition rate of fine roots. Intact soil core is another technique for researching on the fine roots decomposition. The major disadvantages of this method are laborious in sampling and different greatly among samples. Minirhizotrons is an advanced technique for studying the decomposition of fine roots, but may overestimate the decomposition rate. Therefore, the greatest challenge in study of fine-root decomposition is to design efficient experiments and develop new techniques. In this study, we applied the method of carborundum tube widely used in agriculture ecosystem into forest ecosystem to study the decomposing process of fine roots of C.carlesii, C.lanceolata(chinese fir) and their mixed samples, and compared it with the method of litterbag. The experimental site is located at Wanmulin Natural Reserve(27°03'N, 118°09'E)in Fujian province. This experiment was conducted from May 2002 to May 2004. Through two years’ experiment, the results show that: (1) fine roots of C.carlesii decomposed fastest in its community with the two decomposition methods, and its monthly decomposition rates are 0.0052(0~1 mm)and 0.0080(1~2 mm). In addition, fine roots of C.carlesii and its mixed samples decomposed in C.carlesii community show that the decomposition of 1~2 mm diameter is faster than 0~1 mm diameter; fine roots of chinese fir and its mixed samples decomposed in chinese fir plantation laws contrary. Soil condition and biochemical quality of fine roots are the main factors affecting fine roots decomposition. (2) The results of the two methods can be better fitted by Olso negative exponential equation and the fitted decomposition indicators shows small difference between the two methods. In subtropical forest ecosystems, carborundum tube method can be applied to study fine-root decomposition.

Key words： C.carlesii; C.lanceolata; fine roots; decomposition; litterbag method; carborundum tube method; Wanmulin Natural Reserve; Fujian province

Cite this article

JIN Zhao, YANG Yu-sheng, DONG Yun-she, QI, CHEN . Studies on decomposition of fine roots of Castanopsis carlesii and Cunninghamia lanceolatain Wanmulin Natural Reserve, Fujian province (1.Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101,China|2.College of Geography Science, Fujian Normal University, Fuzhou 350012, China|3.Graduate School of the Chinese Academy of Sciences, Beijing 100039, China )[J]. GEOGRAPHICAL RESEARCH, 2007 , 26(3) : 491 -499 . DOI: 10.11821/yj2007030009

References



[1] Harris W F. Comparision of below-ground biomass in natural deciduous forests and loblolly pine plantation. Pedobiologia,1977,17:369~381.



[2] Persson H. Spatial distribution of fine root growth, mortality and decomposition in a young Scots pine stand in Central Sweden. Oikos,1980,34:77~87.



[3] Grier C C, Vogt K A, Keyes M R, et al. Biomass distribution and above- and below-ground production in young and mature Abies amabilis zone ecosystems of the Washington Cascades. Canadian Journal of Forest Research,1981,11:155~167.



[4] Aber J D, Mellilo J M. Fine root turnover in forest ecosystems in relation to quality and form of nitrogen availability: A comparison of two methods. Oecologia,1985,66:317~321.



[5] Vogt K A, Grier C C, Vogt D J. Production, turnover and nutrient dynamics of above- and below-ground detritus of world forests. Advances in Ecological Research,1986,15:303~377.



[6] McClaugherty C A, Aber J D. The role of fine roots in the organic matter and nitrogen budgets of two forested ecosystems. Ecology,1982,63(5):1481~1490.



[7] McClaugherty C A, Aber J D, Melillo J M. Decomposition dynamics of fine roots in forested ecosystems. Oikos,1984,42: 378~386.



[8] John B, Pandey H N, Tripathi R S. Decomposition of fine roots of Pinus Kesiya and turnover of organic matter, N and P of coarse and fine pine roots and herbaceous roots and rhiomes in subtropical pine forests stands of different ages. Biology and Fertility of Soils,2002,35:238~246.



[9] 杨丽韫, 李文华.长白山原始阔叶红松林细根分布及其周转的研究. 北京林业大学学报,2005,27(2):1~5.



[10] 张秀娟, 梅莉, 王政权,等. 细根分解研究及其存在的问题. 植物学通报,2005,22(2):246~254.



[11] Chen H, Harmon M E, Sexton J,et al. Fine-root decomposition and N dynamic in coniferous forests of the Pacific Northwest, USA.Canadian Journal of Forest Research, 2002,32:320~331.



[12] Silver W L, Miya R K.Global patterns in root decomposition:Comparisons of climate and litter quality effects. Oecologia,2001,129:407~419.



[13] 莫江明, SandraBrown, 彭少麟,等. 人为干扰对鼎湖山马尾松林土壤细根和有机质的影响. 生态学报,2005,25(3):491~499.



[14] 张小全, 吴可红. 森林细根生产与周转研究. 林业科学,2001,37(3):126~138.



[15] 杨玉盛, 陈光水, 何宗明,等. 杉木观光木混交林和杉木纯林群落细根生产力、分布及养分归还. 应用与环境生物学报,2002,8(3):223~233.



[16] 廖利平, 邓仕坚, 于小军,等. 不同连栽代数杉木人工林细根生长、分布与营养物质分泌特征. 生态学报,2001,21(4):569~573.



[17] 廖利平, 杨跃军, 汪思龙,等. 杉木、火力楠纯林及其混交林细根分布、分解与养分归还. 生态学报,1999,19(3):342~346.



[18] Dornbush M E, Isenhart T M, Raich J W. Quantifying fine root decomposition: An alternative to buried litter bags. Ecology,2002,83(11):2985~2990.



[19] 林心雄, 程励励, 徐宁,等. 田间测定植物残体分解速率的砂滤管法.土壤学报,1981,18(1):97~102.



[20] 林心雄, 文启孝, 徐宁. 广州地区土壤中植物残体的分解速率. 土壤学报,1985,22(1):47~54.



[21] 林心雄, 程励励, 施书莲,等.绿肥和藁秆等在苏南地区土壤中的分解特征. 土壤学报,1980,17(4):319~327.



[22] 车玉萍, 林心雄. 潮土中有机物质的分解与腐殖质积累. 核农学报,1995,9(2):95~101.



[23] 迟凤琴, 宿庆瑞, 王鹤桥.不同有机物料在黑土中的腐解及土壤有机质平衡的研究. 土壤通报,1996,27(3):124~125.



[24] 李忠佩, 林心雄, 车玉萍.中国东部主要农田土壤有机碳库的平衡与趋势分析. 土壤学报.2002,39(3):351~360.



[25] 吴景贵, 吕岩, 王明辉,等.有机肥腐解过程的红外光谱研究. 植物营养与肥料学报,2004,10(3):259~266.



[26] 杨春生. 建瓯万木林自然保护区的现状和今后发展意见. 武夷科学,2004,20:195~198.



[27] 黄清麟, 郑群瑞, 姚友荣,等. 福建万木林米槠林特征研究. 福建林学院学报,1997,17(3):263~266.



[28] Jones C, Lawton J, Swhacka M.Organisms as ecosystem engineers. Oikos,1994,69:373~386.



[29] Northup R R. Polyphenol as regulators of plant-litter-soil interactions in northern California’ s pygmy forest:A positive feedback? Biogeochemistry,1998,42:189~220.



[30] 杨玉盛. 杉木林可持续经营的研究. 北京: 中国林业出版社,1998.30~34.



[31] Bloomfield J, Vogt K A, Vogt D J. Decay rate and substrate quality of fine roots and foliage of two tropical tree species in the Luquillo experimental forest, Puerto Rico. Plant and Soil,1993,150:233~245.



[32] Gholz H L, Wedin D A, Smitherman S M, et al. Long-term dynamics of pine and hardwood litter in contrasting environments:Toward a global model of decomposition. Global Change Biology, 2000,6:751~765.



[33] Chapin Ш F S, Matson P M, Mooney H A. Principles of Terrestrial Ecosystem Ecology. New York:Springer-Verlag,2002.151~175.



[34] Swift M J, Heal O M, Anderson J M. Decomposition in Terrestrial Ecosystems.Berkeley, CA, University of California Press,1979.372.



[35] Ayres E, Karsten M D, Richard D B. Do plant species encourage soil biota that specialise in the rapid decomposition of their litter? Soil Biology & Biochemistry,2006,38: 183~186.



[36] 张丽娟, 李彦慧, 焦桂华. 土壤有机质转化与平衡研究. 河北农业科学,2000,4(3):67~73.



[37] 方华军, 杨学明, 张晓平.农田土壤有机碳动态研究进展. 土壤通报,2003,34(6):562~568.



[38] 贺金生,王政权,方精云.全球变化下的地下生态学:问题与展望. 科学通报, 2004,49:226~1233.



[39] 黄建辉, 韩兴国, 陈灵芝. 森林生态系统根系生物量研究进展.生态学报,1999,19:270~277.
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