降水季节分配改变对闽楠根枝叶碳氮磷化学计量特征及其异速生长的影响

doi:10.13287/j.1001-9332.202510.009

摘要/Abstract

摘要： 为探明降水季节分配变化对亚热带珍贵树种闽楠的养分特征及生长策略的影响,本研究以6年生闽楠人工幼林为对象,通过构建 “旱季更干、雨季更湿”降水季节分配模式,研究闽楠根枝叶养分分配特征及其异速生长关系。结果表明:降水改变显著提升闽楠N含量(根、枝、叶分别提高37.9%、22.6%、11.9%),显著增加C/P(根、枝、叶分别提高16.1%、9.1%、8.1%)与N/P(根、枝、叶分别提高53.6%、31.9%、20.7%),显著降低C/N(根、枝、叶分别降低22.4%、18.0%、10.4%),C和P含量在年尺度上无显著变化。闽楠通过雨季叶片N含量增加15.5%、旱季根系N含量增加39.3%来实现氮素富集储存;在雨季中期根系P含量显著下降20.3%,C/P显著增加20.9%;各器官C含量在旱季和雨季均无显著变化;在旱季中期根系和枝条的C/N分别显著降低68.3%和33.4%,N/P分别显著增加46.3%和27.6%。降水季节分配变化下,各器官C、N和P含量的变异系数遵循根＞枝＞叶的规律。与对照相比,叶片C-N和C-P协同性增强,根系C-N关系由不显著转为显著正相关,根系N-P异速生长指数从0.703增至1.074。综上,闽楠采取“上稳下变、强化局部耦合”的生态策略,各器官功能协同响应降水季节分配的改变。

关键词: 闽楠, 化学计量, 生长策略

Abstract: We investigated the impacts of precipitation seasonality on the nutrient characteristics and growth strategies of Phoebe bournei, a subtropical precious tree species, with the stand of 6-year-old plantation. We constructed a precipitation seasonality pattern characterized by “drier during the dry season and wetter during the rainy season”, and examined the nutrient allocation characteristics and allometric relationships of roots, branches, and lea-ves. The results showed that precipitation regime significantly increased nitrogen (N) content in roots, branches, and leaves by 37.9%, 22.6%, and 11.9%, respectively, while significantly increased C/P (roots, branches, and leaves increased by 16.1%, 9.1%, and 8.1%, respectively) and N/P (roots, branches, and leaves increased by 53.6%, 31.9%, and 20.7%, respectively), and significantly reduced the C/N (roots, branches, and leaves decreased by 22.4%, 18.0%, and 10.4%, respectively). There were no significant changes in C and P content at the annual scale. P. bourne achieved nitrogen retention by increasing leaf N content by 15.5% during the rainy season and root N content by 39.3% during the dry season. During the mid-rainy season, root P content significantly decreased by 20.3%, and the C/P significantly increased by 20.9%. The C content of various organs did not change significantly during both the dry and rainy seasons. During the mid-dry season, the C/N of roots and branches significantly decreased by 68.3% and 33.4%, and the N/P ratio significantly increased by 46.3% and 27.6%, respectively. Under changes in precipitation seasonality, the coefficient of variation for C, N, and P content in various organs followed a pattern of roots > branches > leaves. Compared to that in the control, the C-N and C-P coordination in leaves was enhanced, the C-N relationship in roots shifted from non-significant to significant positive correlation, and the N-P allometric growth index in roots increased from 0.703 to 1.074. In summary, P. bourne adopted an ecological strategy of “stability in the upper part, variability in the lower part, and enhanced local coupling”, with its synergistic responses of different organs to changes in precipitation seasonality.

Key words: Phoebe bournei, stoichiometry, growth strategy

曹窈畅, 王旭, 郭昊, 宝音满达, 周光益, 何功秀. 降水季节分配改变对闽楠根枝叶碳氮磷化学计量特征及其异速生长的影响[J]. 应用生态学报, 2025, 36(10): 3043-3050.

CAO Yaochang, WANG Xu, GUO Hao, Baoyinmanda, ZHOU Guangyi, HE Gongxiu. Effects of seasonal precipitation distribution change on carbon, nitrogen, and phosphorus stoichiometric characteristics and allometric growth in roots, branches, and leaves of Phoebe bournei[J]. Chinese Journal of Applied Ecology, 2025, 36(10): 3043-3050.

参考文献

[1] Trenberth KE. Changes in precipitation with climate change. Climate Research, 2011, 47: 123-138
[2] Christensen JH, Christensen OB. A summary of the prudence model projections of changes in European climate by the end of this century. Climatic Change, 2007, 81: 7-30
[3] 何念鹏, 于贵瑞, 刘聪聪, 等. 植物功能生态学:从器官到生态系统. 北京: 科学出版社, 2024: 34-37
[4] Elser JJ, Sterner RW, Gorokhova E, et al. Biological stoichiometry from genes to ecosystems. Ecology Letters, 2000, 3: 540-550
[5] 崔高阳, 曹扬, 陈云明. 陕西省森林各生态系统组分氮磷化学计量特征. 植物生态学报, 2015, 39(12): 1146-1155
[6] 闫帮国, 何光熊, 李纪潮, 等. 金沙江干热河谷地区植物叶片中各生源要素的化学计量特征以及异速增长关系. 植物生态学报, 2012, 36(11): 1136-1144
[7] 张文瑾, 佘维维, 秦树高, 等. 氮和水分添加对黑沙蒿群落优势植物叶片氮磷化学计量特征的影响. 植物生态学报, 2024, 48(5): 590-600
[8] Chen YH, Han WX, Tang LY, et al. Leaf nitrogen and phosphorus concentrations of woody plants differ in responses to climate, soil and plant growth form. Ecography, 2013, 36: 178-184
[9] 王珊, 单立山, 李毅, 等. 降水变化对红砂-珍珠碳、氮、磷化学计量特征的影响. 西北植物学报, 2020, 40(2): 335-344
[10] 田地, 严正兵, 方精云. 植物生态化学计量特征及其主要假说. 植物生态学报, 2021, 45(7): 682-713
[11] 蔡妙莹, 张非凡, 李雪琴, 等. 6种阔叶树幼苗不同器官的碳、氮和磷化学计量特征及其异速关系. 生态学报, 2025, 45(9): 4380-4390
[12] 杨婷, 钟全林, 李宝银, 等. 3 种功能型林木幼苗叶片与细根碳氮磷化学计量特征及其异速关系. 应用生态学报, 2020, 31(12): 4051-4057
[13] 张俊红, 王洋, 周生财, 等. 闽楠群体遗传结构分析与核心种质库构建. 林业科学, 2014, 60(1): 68-79
[14] Feeley KJ, Davies SJ, Perez R, et al. Directional changes in the species composition of a tropical forest. Eco-logy, 2011, 92: 871-882
[15] 靳月, 李铁华, 文仕知, 等. 干旱胁迫对闽楠幼苗的生长和生理特性的影响. 中南林业科技大学学报, 2018, 38(9): 50-57
[16] 宋艳艳, 徐培月, 何功秀, 等. 外源多效唑对干旱胁迫下闽楠幼苗抗旱性的影响. 应用生态学报, 2024, 35(10): 2667-2676
[17] 余海霞, 汤行昊, 刘南, 等. 控水与补水条件下连续热浪对闽楠光合特性和生长速率的影响. 生态学报, 2023, 43(8): 3224-3235
[18] 凌高潮, 沈汉, 范荣德, 等. 不同林龄杉木+闽楠复层异龄混交林土壤碳氮磷化学计量特征. 浙江林业科技, 2022, 42(6): 14-20
[19] 吴傲淼, 洪宗文, 游成铭, 等. 华西雨屏区不同林龄柳杉人工林土壤团聚体碳氮磷化学计量特征. 应用生态学报, 2024, 35(9): 2518-2526
[20] 王旭, 郭昊, 宝音满达, 等. 极端干旱条件下亚热带杉木人工混交林林木受损特征及影响因素. 林业科学, 2025, 61(5): 12-22
[21] 吴华清, 陈小梅, 林媚珍, 等. 降水处理对南亚热带季风林土壤微生物群落结构的影响. 生态环境学报, 2016, 25(4): 583-590
[22] 刘雄, 罗超, 向元彬, 等. 模拟降水量变化对华西雨屏区天然常绿阔叶林土壤酶活性的影响. 应用与环境生物学报, 2020, 26(3): 635-642
[23] 昝瑛, 马竟文, 索朗玉珍, 等. 喀斯特弃耕地草本植物根茎叶经济型谱间协调及其对极端降雨的响应. 生态学报, 2024, 44(9): 3676-3688
[24] 张珂, 何明珠, 李新荣, 等. 阿拉善荒漠典型植物叶片碳、氮、磷化学计量特征. 生态学报, 2014, 34(22): 6538-6547
[25] 王新磊, 吕新芳. 氮代谢参与植物逆境抵抗的作用机理研究进展. 广西植物, 2020, 40(4): 583-591
[26] 刘秋丽. 模拟降水量对土壤水氮运移及氨挥发特性的影响. 水资源开发与管理, 2020(1): 39-44
[27] 杨山, 李小彬, 王汝振, 等. 氮水添加对中国北方草原土壤细菌多样性和群落结构的影响. 应用生态学报, 2015, 26(3): 739-746
[28] 卢思, 张哲, 刘丹, 等. 闽楠叶片响应干旱胁迫的蛋白质组分析. 西北植物学报, 2019, 39(2): 258-267
[29] 韦兴兰, 孙丽娟, 郭焕仙, 等. 旱季降雨变化对树番茄苗木生长及化学计量特征影响的模拟研究. 福建农林大学学报: 自然科学版, 2024, 53(5): 825-832
[30] 杜英军, 李士杰, 王丽, 等. 东北地区帽儿山种源实验林区不同种源水曲柳径向生长对气候的响应. 应用生态学报, 2024, 35(5): 1159-1168
[31] 张素, 熊东红, 校亮, 等. 干湿交替对土壤性质影响的研究. 土壤通报, 2017, 48(3): 762-768
[32] 郭昊, 王旭, 宝音满达, 等. 降水格局变化对闽楠人工幼林土壤微生物群落结构及功能的影响[EB/OL]. (2025-04-16) [2025-05-08]. 应用与环境生物学报. https://doi.org/10.19675/j.cnki.1006-687x.2024.11024
[33] 罗丽莹, 陈楠, 王云龙, 等. 闽楠叶形态与叶脉网络性状关系对城市生长环境的响应. 生态学报, 2021, 41(19): 7838-7847
[34] 兰竹. 3年生闽楠幼林不同种源C、N、P生态化学计量特征. 硕士论文. 长沙: 中南林业科技大学, 2017
[35] 王丹, 李亚麒, 孙继伟, 等. 不同家系云南松苗木生长的异速现象. 植物研究, 2021, 41(6): 965-973
[36] Yan ZB, Li P, Chen YH, et al. Nutrient allocation strategies of woody plants: An approach from the scaling of nitrogen and phosphorus between twig branchs and leaves. Scientific Reports, 2016, 6: 20099
[37] Garrish V, Cernusak LA, Winter K, et al. Nitrogen to phosphorus ratio of plant biomass versus soil solution in a tropical pioneer tree, Ficus insipida. Journal of Experimental Botany, 2010, 61: 3735-3748
[38] 严正兵, 金南瑛, 韩廷申, 等. 氮磷施肥对拟南芥叶片碳氮磷化学计量特征的影响. 植物生态学报, 2013, 37(6): 551-557
[39] 姚舒舒, 钟全林, 蔡世锋, 等. 不同林龄木荷叶片-细根-土壤碳氮磷化学计量及稳态性特征. 应用生态学报, 2025, 36(3): 738-746
[40] 吴欣阳, 邵静, 陈晓萍, 等. 武夷山不同海拔阔叶树叶片养分含量及再吸收效率. 应用生态学报, 2023, 34(9): 2305-2313
[41] 孙艳, 洪婉婷, 韩阳, 等. 植物内部磷循环利用提高磷效率的研究进展. 植物营养与肥料学报, 2021, 27(12): 2216-2228
[42] Kuzyakov Y, Xu XL. Competition between roots and microorganisms for nitrogen: Mechanisms and ecological relevance. New Phytologist, 2013, 198: 656-669
[43] Jin L, Gu Y, Yang TM, et al. Relationships between allometric patterns of the submerged macrophyte Vallisneria natans, its stoichiometric characteristics, and the water exchange rate. Ecological Indicators, 2021, 131: 108120