氮添加对杨树人工林细根分解的影响

韩哲; 刘文芳; 徐侠; 郑文绪; 耿庆宏; 樊伟; 彭凡茜

doi:10.12302/j.issn.1000-2006.202411018

氮添加对杨树人工林细根分解的影响

韩哲, 刘文芳, 徐侠, 郑文绪, 耿庆宏, 樊伟, 彭凡茜

南京林业大学学报（自然科学版） ›› 2026, Vol. 50 ›› Issue (3) : 72-78.

PDF(2096 KB)

国家林草科技领军期刊
中国精品科技期刊
中国高校百佳科技期刊
江苏省新闻出版政府奖期刊奖
RCCSE林学权威期刊（A+）
CSCD核心期刊
Scopus数据库收录期刊
中文核心期刊
SCD核心期刊

作者加群：102861116

微信公众号：南京林业大学学报

高级检索

PDF(2096 KB)

南京林业大学学报（自然科学版） ›› 2026, Vol. 50 ›› Issue (3) : 72-78. DOI: 10.12302/j.issn.1000-2006.202411018

专题报道(Ⅱ):施氮调控与林木提质增效研究(执行主编阮宏华李孝刚)

氮添加对杨树人工林细根分解的影响

韩哲 ¹ ,
刘文芳 ²^,^* ,
徐侠 ¹^,^* ,
郑文绪 ¹ ,
耿庆宏 ³ ,
樊伟 ¹ ,
彭凡茜 ¹

作者信息 +

Effects of nitrogen addition on fine root decomposition in poplar plantations

HAN Zhe ¹ ,
LIU Wenfang ²^,^* ,
XU Xia ¹^,^* ,
ZHENG Wenxu ¹ ,
GENG Qinghong ³ ,
FAN Wei ¹ ,
PENG Fanxi ¹

Author information +

文章历史 +

摘要

【目的】探讨不同氮(N)添加水平对杨树人工林细根分解的影响及其调控机制,进一步理解N沉降在碳循环和生态系统养分动态中的作用,为杨树(Populus sp.)人工林的科学管理和森林生态系统优化提供数据支持。【方法】从不同施N水平[N0. 0 g/(m²·a),N1. 5 g/(m²·a),N2. 10 g/(m²·a),N3. 15 g/(m²·a),N4. 30 g/(m²·a)]的样地中采集美洲黑杨(Populus deltoides)的细根,测定细根初始化学性质后将所有细根样品埋入N0处理样地中进行分解试验,并连续3年分7个时间点进行7次取样,记录细根剩余质量,以评估不同初始施氮处理下细根的分解特征及其影响因素。【结果】不同N添加处理下,杨树细根的初始化学性质存在显著差异,细根的N含量随N添加水平的增加而上升,而碳氮比(C/N)则呈下降趋势。细根分解速率随着施N水平的增加逐渐降低。尽管在3年分解过程中各处理的细根残余量持续减少,但在相同分解时长下,施氮量越高,细根残余量越大,表明N添加抑制了细根的分解。细根初始C/N和N浓度是影响分解速率的主要变量,细根初始C/N增加时,分解速率显著升高(R² = 0.86,P< 0.001);而初始N浓度增加时,分解速率则显著降低(R² = 0.80, P < 0.001),表明细根的初始化学组成对其分解过程具有重要调控作用。【结论】N添加通过改变杨树细根的初始化学性质,尤其是提高N浓度、降低C/N,减缓了细根的分解速率,进而可能影响森林土壤有机碳的积累过程。

Abstract

【Objective】This study aims to investigate the impacts of varying nitrogen (N) addition levels on the decomposition dynamics of fine roots in poplar plantations and to elucidate the key regulatory factors influencing this process. The findings are expected to provide critical insights into the role of N deposition in ecosystem carbon (C) cycling and nutrient turnover.【Method】Fine roots of Populus deltoides were collected in 2018 from experimental plots subjected to five different N addition treatments: N0 (0 g/(m²·a)), N1 (5 g/(m²·a)), N2 (10 g/(m²·a)), N3 (15 g/(m²·a)), and N4 (30 g/(m²·a)). After measuring their initial chemical properties, all root samples were buried in the control (N0) plot for decomposition experiments. Samples were collected at seven time points over a three-year period to track residual mass and assess the decomposition patterns and influencing factors associated with different N treatments.【Result】Initial chemical properties of poplar fine roots differed significantly among different N treatments. N concentration in the roots increased with higher N input, while the C/N declined. Decomposition rates decreased with increasing N addition. Although root mass continuously declined over three years, higher N levels consistently resulted in greater residual mass at each time point, indicating that N addition inhibited fine root decomposition. Initial C/N and N concentrations were the primary factors influencing decomposition rate. A higher C/N significantly increased the decomposition rate (R² = 0.86, P < 0.001), while higher N concentration significantly decreased it (R² = 0.80, P < 0.001), suggesting that the initial chemical composition of fine roots strongly regulates their decomposition.【Conclusion】In summary, this study demonstrates that nitrogen addition inhibits fine root decomposition by altering root initial chemistry-specifically by increasing N concentration and reducing the C/N which may in turn affect soil organic carbon accumulation in forest ecosystems.

导出引用

韩哲, 刘文芳, 徐侠, 等. 氮添加对杨树人工林细根分解的影响[J]. 南京林业大学学报（自然科学版）. 2026, 50(3): 72-78 https://doi.org/10.12302/j.issn.1000-2006.202411018

HAN Zhe, LIU Wenfang, XU Xia, et al. Effects of nitrogen addition on fine root decomposition in poplar plantations[J]. Journal of Nanjing Forestry University (Natural Sciences Edition）. 2026, 50(3): 72-78 https://doi.org/10.12302/j.issn.1000-2006.202411018

中图分类号： S714

参考文献

列表( 原文顺序 | 文献年度倒序 | 文中引用次数倒序 ) 可视化分析

[1]	MCCORMACK M L, DICKIE I A, EISSENSTAT D M, et al. Redefining fine roots improves understanding of below-ground contributions to terrestrial biosphere processes[J]. New Phytologist, 2015, 207(3):505-518. DOI: 10.1111/nph.13363. 本文引用 [1]

[2]	GUO L L, DENG M F, YANG S, et al. The coordination between leaf and fine root litter decomposition and the difference in their controlling factors[J]. Global Ecology and Biogeography, 2021, 30(11):2286-2296. DOI: 10.1111/geb.13384. 本文引用 [1]

[3]	JIMOH S O, ATKINS D H, MOUNT H E, et al. Traits associated with the conservation gradient are the strongest predictors of early-stage fine root decomposition rates[J]. Journal of Ecology, 2024, 112(12):2828-2842. DOI: 10.1111/1365-2745.14423. 本文引用 [1]

[4]

孟盈盈, 张黎明, 远勇帅, 等. 土壤水分含量和凋落物特性对陌上菅细根和叶片凋落物分解的影响[J]. 环境科学研究, 2021, 34(3):707-714.

MENG

Y Y

, ZHANG

L M

, YUAN

Y S

, et al. Effects of soil moisture content and litter quality on decomposition of Carex thunbergii fine roots and leaf litter[J]. Research of Environmental Sciences, 2021, 34(3):707-714. DOI: 10.13198/j.issn.1001-6929.2020.05.17.

本文引用 [1]

[5]	TERRER C, PHILLIPS R P, HUNGATE B A, et al. A trade-off between plant and soil carbon storage under elevated CO₂[J]. Nature, 2021, 591(7851):599-603. DOI: 10.1038/s41586-021-03306-8. 本文引用 [1]

[6]	李璟, 沈雅飞, 王丽君, 等. 人工林土壤碳的影响途径研究进展[J]. 陆地生态系统与保护学报, 2023(3):89-98. LI J, SHEN Y F, WANG L J, et al. Research progress on influence pathways of soil carbon in plantation forests[J]. Terrestrial Ecosystem and Conservation, 2023(3):89-98. DOI: 10.12356/j.2096-8884.2023-0012. 本文引用 [1]

[7]	KOU L, JIANG L, FU X L, et al. Nitrogen deposition increases root production and turnover but slows root decomposition in Pinus elliottii plantations[J]. New Phytologist, 2018, 218(4):1450-1461. DOI: 10.1111/nph.15066. 本文引用 [1]

[8]	FU X F, XU C H, GENG Q H, et al. Effects of nitrogen application on the decomposition of fine roots in temperate forests:a meta-analysis[J]. Plant and Soil, 2022, 472(1):77-89. DOI: 10.1007/s11104-021-05176-5. 本文引用 [2]

[9]	ZHU H Q, ZHAO J J, GONG L. The morphological and chemical properties of fine roots respond to nitrogen addition in a temperate Schrenk’s spruce (Picea schrenkiana) forest[J]. Scientific Reports, 2021, 11(1):3839. DOI: 10.1038/s41598-021-83151-x. 本文引用 [1]

[10]	DONG L L, BERG B, SUN T, et al. Response of fine root decomposition to different forms of N deposition in a temperate grassland[J]. Soil Biology and Biochemistry, 2020, 147:107845. DOI: 10.1016/j.soilbio.2020.107845. 本文引用 [1]

[11]

郭超, 王霖娇. 氮沉降对森林生态系统土壤微生物、酶活性以及细根生产与周转的影响研究进展[J]. 生态学杂志, 2021, 40(11):3730-3741.

GUO

, WANG

L J

. Effects of nitrogen deposition on soil microbes,enzyme activities,fine root production and turnover in forest ecosystems:a review[J].Chinese Journal of Ecology, 2021, 40(11):3730-3741. DOI: 10.13292/j.1000-4890.202111.010.

本文引用 [1]

[12]	袁吉有. 大气氮沉降对森林土壤微生物影响的研究进展[J]. 云南大学学报(自然科学版), 2023, 45(1):199-210. YUAN J Y. Advances in the effects of atmospheric nitrogen deposition on soil microorganism of forest ecosystem[J]. Journal of Yunnan University (Natural Sciences Edition), 2023, 45(1):199-210. DOI: 10.7540/j.ynu.20200474. 本文引用 [1]

[13]	JIANG L, KOU L, LI S G. Alterations of early-stage decomposition of leaves and absorptive roots by deposition of nitrogen and phosphorus have contrasting mechanisms[J]. Soil Biology and Biochemistry, 2018, 127:213-222. DOI: 10.1016/j.soilbio.2018.09.037. 本文引用 [1]

[14]	WU J J, ZHANG H, CHENG X L, et al. Nitrogen addition stimulates litter decomposition rate:from the perspective of the combined effect of soil environment and litter quality[J]. Soil Biology and Biochemistry, 2023, 179:108992. DOI: 10.1016/j.soilbio.2023.108992. 本文引用 [1]

[15]	李媛媛, 王正文, 孙涛. 氮添加对温带森林细根长期分解的影响[J]. 植物研究, 2017, 37(6):848-854. LI Y Y, WANG Z W, SUN T. Response of fine root decomposition to long-term nitrogen addition in the temperate forest[J]. Bulletin of Botanical Research, 2017, 37(6):848-854. DOI: 10.7525/j.issn.1673-5102.2017.06.007. 本文引用 [1]

[16]	DEFOREST J L, ZAK D R, PREGITZER K S, et al. Atmospheric nitrate deposition and the microbial degradation of cellobiose and vanillin in a northern hardwood forest[J]. Soil Biology and Biochemistry, 2004, 36(6):965-971. DOI: 10.1016/j.soilbio.2004.02.011. 本文引用 [1]

[17]

刘仁, 张宇飞, 金志芳, 等. 温度调控外源氮添加对毛竹细根分解及其养分释放的影响[J]. 生态学杂志, 2019, 38(12):3617-3625.

LIU

, ZHANG

Y F

, JIN

Z F

, et al. Incubation temperature modulates the effects of exogenous nitrogen addition on decomposition and nutrient release of Phyllostachys edulis fine roots[J]. Chinese Journal of Ecology, 2019, 38(12):3617-3625. DOI: 10.13292/j.1000-4890.201912.020.

本文引用 [1]

[18]	张雨鉴, 王克勤, 宋娅丽, 等. 滇中亚高山地带性植被凋落物分解对模拟氮沉降的响应[J]. 生态学报, 2020, 40(22):8274-8286. ZHANG Y J, WANG K Q, SONG Y L, et al. Response of litter decomposition of zonal vegetation to simulated nitrogen deposition in central Yunnan,China[J].Acta Ecologica Sinica, 2020, 40(22):8274-8286. 本文引用 [1]

[19]

许丽颖, 魏统超, 王佳音, 等. 氮、磷、钾肥对紫穗槐幼苗根叶化学计量特性的影响[J]. 森林工程, 2024, 40(4):29-38.

L Y

, WEI

T C

, WANG

J Y

, et al. Effects of nitrogen,phosphorus and potassium fertilization on stoichiometric characteristics and growth restrict pattern of root and leaf of Amorpha fruticose L.[J]. Forest Engineering, 2024, 40(4): 1-10. DOI:10.3969/j.issn.1006-8023.2024.04.001.

本文引用 [1]

[20]	JIANG X Y, WANG X J, QIAO Y Q, et al. Atmospheric nitrogen deposition affects forest plant and soil system carbon:nitrogen:phosphorus stoichiometric flexibility:a meta-analysis[J]. Forest Ecosystems, 2024, 11:100192. DOI: 10.1016/j.fecs.2024.100192. 本文引用 [1]

[21]	SUN Y, WANG C T, CHEN H Y H, et al. Responses of C:N stoichiometry in plants,soil,and microorganisms to nitrogen addition[J]. Plant and Soil, 2020, 456(1):277-287. DOI: 10.1007/s11104-020-04717-8. 本文引用 [1]

[22]	闫国永, 邢亚娟, 王晓春, 等. 氮沉降对细根动态和形态特征的影响研究进展[J]. 中国农学通报, 2016, 32(15):79-85. YAN G Y, XING Y J, WANG X C, et al. Research progress of nitrogen deposition effect on fine root dynamic and morphological characteristics[J]. Chinese Agricultural Science Bulletin, 2016, 32(15):79-85. 本文引用 [1]

[23]	MA X Y, WANG T X, SHI Z, et al. Long-term nitrogen deposition enhances microbial capacities in soil carbon stabilization but reduces network complexity[J]. Microbiome, 2022, 10(1):112. DOI: 10.1186/s40168-022-01309-9. 本文引用 [1]

[24]	ZHAO X X, TIAN Q X, HUANG L, et al. Fine-root functional trait response to nitrogen deposition across forest ecosystems:a meta-analysis[J]. Science of The Total Environment, 2022, 844:157111. DOI: 10.1016/j.scitotenv.2022.157111. 本文引用 [1]

[25]

王庆贵, 张晓莹. 土壤微生物对大气氮沉降的响应研究进展[J]. 河南师范大学学报(自然科学版), 2021, 49(6):11-18,69.

WANG

Q G

, ZHANG

X Y

. Response of soil microorganisms to atmospheric nitrogen deposition:a review[J]. Journal of Henan Normal University (Natural Science Edition), 2021, 49(6):11-18,69. DOI: 10.16366/j.cnki.1000-2367.2021.06.002.

本文引用 [1]

[26]	WANG J, HUI D F, LU H F, et al. Main and interactive effects of increased precipitation and nitrogen addition on growth,morphology,and nutrition of Cinnamomum burmanni seedlings in a tropical forest[J]. Global Ecology and Conservation, 2019, 20:e00734. DOI: 10.1016/j.gecco.2019.e00734. 本文引用 [1]

[27]	VERMA P, SAGAR R. Effect of nitrogen (N) deposition on soil-N processes: a holistic approach[J]. Scientific Reports, 2020, 10(1):10470. DOI: 10.1038/s41598-020-67368-w. 本文引用 [1]

[28]

CUI

J W

, ZHU

R L

, WANG

X Y

, et al. Effect of high soil C/N ratio and nitrogen limitation caused by the long-term combined organic-inorganic fertilization on the soil microbial community structure and its dominated SOC decomposition[J]. Journal of Environmental Management, 2022, 303:114155. DOI: 10.1016/j.jenvman.2021.114155.

本文引用 [1]

[29]	JIAN S Y, LI J W, CHEN J, et al. Soil extracellular enzyme activities,soil carbon and nitrogen storage under nitrogen fertilization:a meta-analysis[J]. Soil Biology and Biochemistry, 2016, 101:32-43. DOI: 10.1016/j.soilbio.2016.07.003. 本文引用 [1]

[30]	GUO H L, ZHAO Y, CHANG J S, et al. Enzymes and enzymatic mechanisms in enzymatic degradation of lignocellulosic biomass:a mini-review[J]. Bioresource Technology, 2023, 367:128252. DOI: 10.1016/j.biortech.2022.128252. 本文引用 [1]

[31]	冯会丽. 杨树人工林土壤和树干甲烷通量变化特征及微生物作用机制[D]. 南京: 南京林业大学, 2022. FENG H L. Variation of methane flux in soil and stem of poplar plantation and its microbial mechanisms[D]. Nangjing: Nanjing Forestry University, 2022. 本文引用 [1]

[32]	LI Q, ZHANG M H, GENG Q H, et al. The roles of initial litter traits in regulating litter decomposition:a “common plot” experiment in a subtropical evergreen broadleaf forest[J]. Plant and Soil, 2020, 452(1):207-216. DOI: 10.1007/s11104-020-04563-8. 本文引用 [1]

[33]	OLSON J S. Energy storage and the balance of producers and decomposers in ecological systems[J]. Ecology, 1963, 44(2):322-331. DOI: 10.2307/1932179. 本文引用 [1]

[34]	JING H, ZHANG P, LI J J, et al. Effect of nitrogen addition on the decomposition and release of compounds from fine roots with different diameters:the importance of initial substrate chemistry[J]. Plant and Soil, 2019, 438(1):281-296. DOI: 10.1007/s11104-019-04017-w. 本文引用 [1]

[35]	SUN T, DONG L L, WANG Z W, et al. Effects of long-term nitrogen deposition on fine root decomposition and its extracellular enzyme activities in temperate forests[J]. Soil Biology and Biochemistry, 2016, 93:50-59. DOI: 10.1016/j.soilbio.2015.10.023. 本文引用 [1]

[36]

罗来聪, 王皓, 余雅迪, 等. 不同生态型能源植物柳枝稷凋落物-土壤生态化学计量学特征对氮磷添加的响应[J]. 生态与农村环境学报, 2025, 41(1): 128-137.

LUO

L C

, WANG

, YU

Y D

, et al. Response of litter-soil ecological stoichiometry characteristics of biofuel crop switchgrass (Panicum virgatum) with different ecotypes to nitrogen and phosphorus addition[J]. Journal of Ecology and Rural Environment, 2025, 41(1): 128-137. DOI:10.19741/j.issn.1673-4831.2024.0176.

本文引用 [1]

[37]	XU Y W, HUANG R X, ZHOU B Z, et al. Fine-root decomposition and nutrient return in moso bamboo (Phyllostachys pubescens J.Houz.) plantations in southeast China[J]. Frontiers in Plant Science, 2022, 13:735359. DOI: 10.3389/fpls.2022.735359. 本文引用 [1]

[38]	AERTS R. The freezer defrosting:global warming and litter decomposition rates in cold biomes[J]. Journal of Ecology, 2006, 94(4):713-724. DOI: 10.1111/j.1365-2745.2006.01142.x. 本文引用 [1]

[39]	CHEN G T, SUN Y, CHEN Y Q, et al. Manganese indicates root decomposition rates across soil layer,root order,and tree species:evidence from a subtropical forest[J]. Soil Biology and Biochemistry, 2023, 181:109023. DOI: 10.1016/j.soilbio.2023.109023. 本文引用 [1]

[40]	WANG L J, SHEN Y F, CHENG R M, et al. Nitrogen addition promotes early-stage and inhibits late-stage decomposition of fine roots in Pinus massoniana plantation[J]. Frontiers in Plant Science, 2022, 13:1048153. DOI: 10.3389/fpls.2022.1048153. 本文引用 [1]

[41]	TU L H, PENG Y, CHEN G, et al. Direct and indirect effects of nitrogen additions on fine root decomposition in a subtropical bamboo forest[J]. Plant and Soil, 2015, 389(1):273-288. DOI: 10.1007/s11104-014-2353-9. 本文引用 [2]

[42]	FAN P P, GUO D L. Slow decomposition of lower order roots:a key mechanism of root carbon and nutrient retention in the soil[J]. Oecologia, 2010, 163(2):509-515. DOI: 10.1007/s00442-009-1541-4. 本文引用 [1]

[43]	XIA M X, TALHELM A F, PREGITZER K S. Long-term simulated atmospheric nitrogen deposition alters leaf and fine root decomposition[J]. Ecosystems, 2018, 21(1):1-14. DOI: 10.1007/s10021-017-0130-3. 本文引用 [1]

[44]	MOORHEAD D L, SINSABAUGH R L. A theoretical model of litter decay and microbial interaction[J]. Ecological Monographs,2006, 76(2):151-174. DOI: 10.1890/0012-9615(2006)076[0151:ATMOLD]2.0.CO;2. 本文引用 [1]

[45]	LI N, XU X, ZHU Z, et al. Long-term N addition leads to microbial C,but not N limitation of poplar plantation soils in eastern China[J]. Forest Ecology and Management, 2023, 542:121074. DOI: 10.1016/j.foreco.2023.121074. 本文引用 [1]

[46]	SUN T, DONG L L, ZHANG Y Y, et al. General reversal of N-decomposition relationship during long-term decomposition in boreal and temperate forests[J]. Proceedings of the National Academy of Sciences of the United States of America, 2024, 121(20):e2401398121. DOI: 10.1073/pnas.2401398121. 本文引用 [1]

[47]	ZHANG J H, HE N P, LIU C C, et al. Variation and evolution of C:N ratio among different organs enable plants to adapt to N-limited environments[J]. Global Change Biology, 2020, 26(4):2534-2543. DOI: 10.1111/gcb.14973. 本文引用 [1]