[1]牛 牧,陈俊华,周大松,等.川中丘陵区4种乡土阔叶树根系拓扑结构特征[J].南京林业大学学报(自然科学版),2020,44(02):125-132.[doi:10.3969/j.issn.1000-2006.201811010]
 NIU Mu,CHEN Junhua,ZHOU Dasong,et al.Topological characteristics of the root systems of four native broad-leaved trees in the central Sichuan hilly region[J].Journal of Nanjing Forestry University(Natural Science Edition),2020,44(02):125-132.[doi:10.3969/j.issn.1000-2006.201811010]





Topological characteristics of the root systems of four native broad-leaved trees in the central Sichuan hilly region
牛 牧12陈俊华23周大松23谢天资23别鹏飞4赵 润4慕长龙 23*
(1.北京林业大学林学院,北京 100083; 2.四川省林业科学研究院,四川 成都 610081; 3.四川龙门山森林生态系统国家定位观测研究站,四川 平武 622550; 4.绵阳师范学院生命科学与技术学院,四川 绵阳 621000)
NIU Mu12 CHEN Junhua23 ZHOU Dasong23 XIE Tianzi23 BIE Pengfei4 ZHAO Run4 MU Changlong 23*
(1.College of Forestry, Beijing Forestry University, Beijing 100083, China; 2.Sichuan Academy of Forestry,Chengdu 610081, China; 3. Sichuan Longmenshan National Positioning Observation and Research Station for Forest Ecosystem, Pingwu 622550, China; 4. Life Science and Technology College, Mianyang Teachers' College, Mianyang 621000, China)
川中丘陵区 乡土阔叶树 林木根系 拓扑结构 适应策略
central Sichuan hilly region native broad-leaved tree: tree roots topological characteristics adaptation strategy
【Objective】 Nutrient competition between the underground roots of trees has profound effects on tree growth, species coexistence, and forest community dynamics. An important trait in this regard is root system architecture, which can be described in terms of the geometric morphological characteristic parameters and topological structure of root systems. In this study, in order to provide theoretical and practical references for the development of protected forests and vegetation restoration in the central Sichuan hilly region, we examined the differences and similarities of the root systems of native broad-leaved trees in this region and their adaptive strategies in the soil environment.【Method】 We focused on four native broad-leaved tree species(Alnus cremastogyne, Toona sinensis, Camptotheca acuminate and Cinnamomum camphora)in the central Sichuan hilly region, which had been replanted as part of a Cupressus funebris transformation experiment based on cutting strips in cypress stands 7 years age. For analyses of growth traits, we selected seven healthy individuals of A. cremastogyne, T. sinensis and C. acuminata, respectively, six individuals of C. camphora, then measured their basal diameter, breast-height diameter, height and canopy cover. All root systems(root diameter > 3 mm)were extracted and their distributions were determines using 50 cm × 50 cm grids. Furthermore, we drew 1:40-scale overhead views of the root systems using 50 cm × 75 cm coordinate paper. The length of roots in each root grade, the root diameter before and after branching, root number, the interior and exterior link number of root as well as the connecting length, were measured using electronic vernier calipers and a steel tape. 【Result】① The root system of A. cremastogyne was found to have a predominantly horizontal distribution(the horizontal distribution radius was 2.29 times the vertical depth). Moreover, the lateral roots of this tree are well developed and the root system is shallow. Although the main roots of C. acuminata trees were developed, with vertical depth was 2.71 times the horizontal distribution radius, and the lateral roots were relatively underdeveloped. In contrast, both the main roots and lateral roots of C. camphora and T. sinensis were found to be well developed. With the exception of A. cremastogyne, the trees examined in this study are all deep-rooted species. Apart from C. camphora and T. sinensis, the horizontal distribution radius showed a significant difference(df = 3, F = 145.007, P < 0.05)among the species.Moreover, in the case of the vertical depth of roots, there were significant differences(df=3,F=99.478, P < 0.05)among species, with the exception of C. camphora and C. acuminata. ② Topological indices were found to differ significantly among the species, of which qa, qb, and TI showed highly significant differences(dfqa= 3, Fqa = 38.007, Pqa <0.01; dfqb= 3, Fqb =4.066, Pqb < 0.05; and dfTI=3, FTI= 69.561, PTI < 0.01, respectively). The root branching structures of A. cremastogyne and T. sinensis was characteristically fork-shaped, and had qa, qb and TI values of 0.160, 0.097 and 0.673 as well as 0.122, 0.047 and 0.635, respectively. In contrast, the root branching structures of C. acuminata and C. camphora exhibited a fishtail topology, with qa, qb, TI values of 0.582, 0.547 and 0.885 as well as 0.364, 0.266 and 0.799, respectively. ③ We also found that the average connection length of root systems differed significantly(df = 3, F = 6.166, P < 0.05)among the four species, and could be arranged in the following descending order: C. camphora > T. sinensis > A. cremastogyne>C. acuminata.【Conclusion】 In order to adapt to the infertile soils and nutrient-deficient environment characterizing the central Sichuan hilly region, each tree species adopts strategies to enhance the effective utilization of nutrient space. A. cremastogyne and T. sinensis promote nutrient absorption via horizontal expansion of their secondary root systems, whereas C. camphora and C. acuminata obtain soil water and nutrients by means of the rapid development of vertical roots. Our results indicate that these four native species can normally grow in the central Sichuan hilly region. On the basis of their branching structure and ecological characteristics, we conclude that A. cremastogyne preferentially grows in locations receiving ample sunlight, whereas C. acuminata and T. sinensis favor fertile, moist, as well as sunny sites, and C. camphora shows a general preference for fertile and moist conditions


[1] KROON D, H. Ecology: how do roots interact? [J]. Science, 2007, 318(5856): 1562-1563. DOI: 10.1126/science. 1150726.
[2] DANNOWSKI M, BLOCK A. Fractal geometry and root system structures of heterogeneous plant communities [J]. Plant and Soil, 2005, 272(1/2): 61-76. DOI: 10.1007/s11104-004-3981-2.
[3] VOGT K A,VOGT D J,PALMIOTTO P A, et al. Review of root dynamics in forest ecosystems grouped by climate, climatic forest type and species [J]. Plant and Soil, 1995, 187(2): 159-219. DOI: 10.1007/bf00017088.
[4] GLIMSKÄR A. Estimates of root system topology of five plant species grown at steady-state nutrition [J]. Plant and Soil, 2000, 227(1/2): 249-256. DOI: 10.1023/a:1026531200864.
[5] BERNTSON G M. Topological scaling and plant root system architecture: developmental and functional hierarchies [J]. New Phytologist, 1997, 135(4): 621-634. DOI: 10.1046/j.1469-8137.1997.00687. x.
[6] FITTER A H. An architectural approach to the comparative ecology of plant root systems [J]. New Phytologist, 1987, 106(S1): 61-77. DOI: 10.1111/j.1469-8137.1987. tb04683. x.
[7] FITTER A H, STICKLAND T R, HARVEY M L, et al. Architectural analysis of plant root systems 1: architectural correlates of exploitation efficiency [J]. New Phytologist, 1991, 118: 375-382. DOI: 10.1111/j. 1469-8137. 1991.tb00018. x.
[8] FITTER A H, STICKLAND T R. Architectural analysis of plant root systems 2: influence of nutrient supply on architecture in contrasting plant species [J]. New Phytologist, 1991, 118: 383-389. DOI: 10. 1111/j. 1469-8137. 1991.tb00019. x.
[9] 何功秀, 文仕知, 杨丽丽, 等. 桤木人工林细根与土壤养分含量季节动态变化[J]. 中南林业科技大学学报, 2008, 28(6): 61-65. HE G X, WEN S Z, YANG L L,et al. Seasonal dynamic variation of nutrient elements from the roots and soil of Alnus cremastogyme Burk plantations [J]. Journal of Central South University of Forestry & Technology, 2008, 28(6): 61-65. DOI: 10. 3969/j. issn. 1673-923X. 2008. 06. 018.
[10] 谭桂菲, 安家成, 黎贵卿, 等. 15年生香樟人工林的生物量及生产力[J]. 广西林业科学, 2017, 46(4): 369-374. TAN G F, AN J C, LI G Q,et al. Biomass and productivity of 15-year-old Cinnamomum camphora plantation forest [J]. Guangxi Forestry Science, 2017, 46(4): 369-374. DOI: 10.3969/j. issn.1006-1126.2017. 04. 006.
[11] 陈奋飞. 香椿联合固氮菌的筛选及回接[D]. 福州: 福建师范大学, 2007. CHEN F F. Selection and inoculation of nitrogen fixing bacteria in Toona sinensis [D]. Fuzhou: Fujian Normal University, 2007.
[12] 张腾飞, 李贤伟, 范川, 等. 香樟人工林土壤表层细根形态特征、生物量及碳氮含量变化[J]. 西北农林科技大学学报(自然科学版), 2014, 42(10): 103-110.ZHANG T F, LI X W, FAN C,et al. Morphology, biomass and changes in C and N contents of fine roots in top soil of Cinnamomum camphora plantations [J]. Journal of Northwest A&F University(Natural Science Edition), 2014, 42(10): 103-110. DOI: 10. 13207/j. cnki. jnwafu. 2014. 10. 049.
[13] 刘运科, 苏宇, 李德会, 等. 川中丘陵区3个树种的细根形态和功能异质性分析[J]. 西北植物学报, 2016,36(5):1012-1020. LIU Y K, SU Y, LI D H,et al. Morphological and functional heterogeneity of fine roots among three tree species in the hilly region of central Sichuan [J]. Acta Botanica Boreali-Occidentalia Sinica, 2016, 36(5): 1012-1020. DOI: 10.7606/j. issn. 1000-4025. 2016. 05. 1012.
[14] 王玲丽.喜树营养器官的结构及喜树碱含量动态变化的研究[D]. 西安: 西北大学, 2006. WANG L L. Studies on Structures of vegetative organs and dynamic changes of camptothecin in Camptotheca acuminate [D]. Xi'an: Northwest University, 2006.
[15] 李金玲. 喜树的部分重要营养特性研究[D]. 贵阳: 贵州大学, 2006. LI J L. Study on some important organs of Camptotheca acuminate [D]. Guiyang: Guizhou University, 2006.
[16] 龚固堂, 牛牧, 慕长龙, 等. 间伐强度对柏木人工林生长及林下植物的影响[J]. 林业科学, 2015, 51(4): 8-15. GONG G T, NIU M, MU C L,et al. Impacts of different thinning intensities on growth of Cupressus funebris plantation and understory plants [J]. Scientia Silvae Sinicae, 2015, 51(4): 8-15.
[17] OPPELT A L, KURTH W, DZIERZON H, et al. Structure and fractal dimensions of root systems of four co-occurring fruit tree species from Botswana [J]. Annals of Forest Science, 2000, 57(5): 463-475. DOI: 10. 1051/forest: 2000135.
[18] OPPELT A L, KURTH W, GODBOLD D L. Contrasting rooting patterns of some arid-zone fruit tree species from Botswana-II: coarse root distribution [J]. Agroforestry Systems, 2005, 64(1): 13-24. DOI: 10. 1007/s10457-005-2403-7.
[19] 杨小林, 张希明, 李义玲, 等. 塔克拉玛干沙漠腹地3种植物根系构型及其生境适应策略[J]. 植物生态学报, 2008, 32(6): 1268-1276. YANG X L, ZHANG X M, LI Y L,et al. Analysis of root architecture and root adaptive strategy in the Taklimakan desert area of China [J]. Journal of Plant Ecology, 2008, 32(6): 1268-1276. DOI: 10. 3773/j. issn. 1005-264x. 2008. 06. 007.
[20] HODGE A. The plastic plant: root responses to heterogeneous supplies of nutrients [J]. New Phytologist, 2004, 162(1): 9-24. DOI: 10. 1111/j. 1469-8137. 2004. 01015. x.
[21] VERCAMBRE G, PAGÈS L, DOUSSAN C, et al. Architectural analysis and synthesis of the plum tree root system in an orchard using a quantitative modelling approach [J]. Plant and Soil, 2003, 251(1): 1-11.DOI: 10. 1023/a: 1022961513239.
[22] WAHID P A. A system of classification of woody perennials based on their root activity patterns [J]. Agroforestry Systems, 2000, 49(2):123-130. DOI: 10. 1023/a: 1006309927504.
[23] 王海风, 肖兴翠, 龚细娟, 等. 桤木生物量及根系分布规律[J]. 湖南林业科技, 2013, 40(3): 39-42. WANG H F, XIAO X C, GONG X J,et al. Biomass and root distribution of Alnus cremastogyne plantation [J]. Hunan Forestry Science & Technology, 2013, 40(3): 39-42. DOI: 10.3969/j. issn. 1003-5710. 2013. 03. 010.
[24] 蔡洁, 文仕知, 何功秀, 等. 湘北四川桤木人工林根系空间分布特征[J]. 浙江林业科技, 2010, 30(5): 42-45. CAI J, WEN S Z, HE G X,et al. Spatial distribution of root system of Alnus cremastogyne plantation in the north Hunan Province [J]. Zhejiang Forestry Science & Technology, 2010, 30(5): 42-45. DOI: 10. 3969/j. issn. 1001-3776. 2010. 05. 009.
[25] 蔡施泽, 乐笑玮, 谢长坤, 等. 3种上海市常见古树粗根系分布特征及保护对策[J]. 上海交通大学学报(农业科学版), 2017, 35(4): 7-14. CAI S Z, LE X W, XIE C K,et al. Roots distribution characteristic and protection strategies of 3 kinds of ancient trees in Shanghai [J]. Journal of Shanghai of Shanghai Jiaotong University(Agricultural Science), 2017, 35(4): 7-14. DOI: 10. 3969/j. issn. 1671-9964. 2017. 04. 002.
[26] BIONDINI M E, GRYGIEL C E. Landscape distribution of organisms and the scaling of soil resources [J]. The American Naturalist, 1994, 143(6):1026-1054. DOI: 10. 1086/285647.
[27] BOUMA T J, NIELSEN K L, HAL J V, et al. Root system topology and diameter distribution of species from habitats differing in inundation frequency [J]. Functional Ecology, 2001, 15(3):360-369. DOI: 10. 1046/j. 1365-2435. 2001.00523. X.
[28] WALK T C. Modeling applicability of fractal analysis to efficiency of soil exploration by roots [J]. Annals of Botany, 2004, 94(1): 119-128. DOI: 10. 1093/aob/mch116.
[29] 潘攀, 慕长龙, 牟菊英, 等. 长江流域防护林林副产品综合开发利用途径综述[J]. 贵州林业科技, 2004, 32(1): 13-19, 26. PAN P, MU C L, MOU J Y,et al. The approach of comprehensive development and utilization of the minor of determination in the Changjiang River is summarized [J]. Guizhou Forestry Science & Technology, 2004, 32(1): 13-19, 26.
[30] 陈俊华,周大松,牛牧,等.川中卫陵区4种乡土阔叶树种细根性状对比研究[J].南京林业大学学报(自然科学版),2020,44(1):31-38. CHEN J H, ZHOU D S, NIU M, et al. Comparative analysis on the fine root traits of the four native broad-leaved trees in the hilly region of central Sichuan Province[J]. J Nanjing For Univ(Nat Sci Ed), 2020,44(1):31-38. DOI:10.3969/j.issn.1000-2006.201811008.


收稿日期:2018-11-05 修回日期:2019-09-06基金项目:“十二五”国家科技支撑计划(2015BAD07B0402)。 第一作者:牛牧(12969386 @qq.com),工程师,ORCID(0000-0002-0299-784X)。*通信作者:慕长龙(mucl2006@aliyun.com),研究员,ORCID(0000-0003-4927-7425)。
更新日期/Last Update: 2019-03-25