经营措施对毛竹林土壤不同组分有机碳、氮及化学结构的影响

doi:10.13287/j.1001-9332.202001.002

应用生态学报 ›› 2020, Vol. 31 ›› Issue (1): 25-34.doi: 10.13287/j.1001-9332.202001.002

经营措施对毛竹林土壤不同组分有机碳、氮及化学结构的影响

杨传宝¹, 倪惠菁², 苏文会², 钟哲科^1*, 张小平¹, 卞方圆¹, 李雯¹

¹ 国家林业和草原局竹子研究开发中心, 竹子资源与利用国家林业局重点实验室, 杭州 310012;
²国际竹藤中心, 国家林业局竹藤科学与技术重点实验室, 北京 100102

收稿日期:2019-09-02 出版日期:2020-01-15 发布日期:2020-01-15
通讯作者: E-mail: Zhekez@163.com
作者简介:杨传宝, 男, 1991年生, 博士研究生。主要从事森林生态和森林土壤学研究。E-mail: chuanbaoy@126.com
基金资助:
中央级公益性科研院所基本科研业务费专项(CAFYBB2018ZD002)

Effects of management measures on organic carbon, nitrogen and chemical structure of different soil fractions in Phyllostachys edulis plantations.

YANG Chuan-bao¹, NI Hui-jing², SU Wen-hui², ZHONG Zhe-ke^1*, ZHANG Xiao-ping¹, BIAN Fang-yuan¹, LI Wen¹

¹Key Laboratory of Resources and Utilization of Bamboo of State Forestry Administration, China National Bamboo Research Center, Hangzhou 310012, China;
² Key Laboratory of Science and Technology of Bamboo and Rattan of State Forestry Administration, International Centre for Bamboo and Rattan, Beijing 100102, China

Received:2019-09-02 Online:2020-01-15 Published:2020-01-15
Contact: E-mail: Zhekez@163.com
Supported by:
This work was supported by the Fundamental Research Funds for the Central Non-profit Research Institution of Chinese Academy of Forestry (CAFYBB2018ZD002).

摘要/Abstract

摘要： 以次生常绿阔叶林为对照,选择立地条件相近的无经营、粗放经营和集约经营3种类型毛竹林为研究对象,应用密度-粒径联合分组以及化学、生物分析和傅里叶变换红外光谱(FTIR)方法,探讨经营措施对毛竹林土壤不同组分有机碳、氮含量,分配比例及结构特征的影响。结果表明: 与对照相比,无经营和粗放经营毛竹林显著提高了土壤总有机碳(TOC)、全氮(TN)、游离态颗粒有机碳、氮、可溶性有机碳(DOC)、氮(DON)和矿物结合态有机碳、氮的含量。无经营毛竹林虽然显著增大了游离态颗粒有机碳、氮的分配比例,但其与黏土矿物结合的有机碳依然是土壤有机碳的最大贮存库(67.6%)。集约经营导致竹林土壤有机碳、全氮的贮量及各组分有机碳、氮含量下降,但明显增大了DOC/TOC、微生物生物量氮与全氮比值以及微生物生物量碳和土壤有机碳的比值(微生物商)。经营措施对土壤有机碳的化学结构也具有显著影响。与对照相比,无经营和粗放经营毛竹林土壤有机碳中酚醇-OH、脂肪族-CH、芳香族C=C和羰基C=O吸收峰相对强度增强,土壤疏水性显著增加。土壤有机碳的脂肪碳、芳香碳和疏水性与土壤碳氮总量呈显著正相关,与微生物商呈显著负相关。在人为干扰减少的情况下,毛竹林凋落物、根系等有机质残体输入量的增多引起土壤难分解化合物的相对积累,使有机碳化学稳定性明显增强。同时,土壤黏土矿物质对土壤有机碳起到了很好的保护作用,通过矿物-有机碳复合使土壤碳储存稳定性更高,进而有利于土壤碳的长期保存。

Abstract: To examine the effects of management measures on carbon and nitrogen contents, as well as their distribution and structural characteristics of different soil fractions in Moso bamboo plantations, we compared three types of the bamboo forests (undisturbed, extensively managed, and intensively managed) and the control secondary broadleaved evergreen forest using the methods of physical fractionation, chemical and biological analysis and Fourier-transform infrared spectroscopy (FTIR). The results showed that soil total organic carbon (TOC) and total nitrogen (TN) content, as well as free particulate organic carbon and nitrogen, soluble organic carbon and nitrogen (DOC, DON), and mineral-associated organic carbon and nitrogen in the undisturbed and extensively managed Moso bamboo plantations were significantly increased compared with that in the control. The distribution ratio of free particulate organic carbon and nitrogen in the undisturbed Moso bamboo plantation significantly increased, with mineral-associated organic carbon being the largest reservoir of soil organic carbon (67.6%). Intensive management resulted in the decrease of soil organic carbon, total nitrogen storage, and the contents of each component, but significantly increased DOC/TOC, the ratio of microbial biomass nitrogen to TN as well as the ratio of microbial biomass carbon to TOC (microbial quotient). Management measures significantly affected the chemical structure of SOC. Compared with the control, the relative intensities of phenolic and alcoholic-OH, aliphatic methyl and methylene, aromatic C=C, and carbonyl C=O absorption were higher in the SOC of undisturbed and extensively managed Moso bamboo plantations, and soil hydrophobicity was significantly increased. Results from correlation analysis showed that soil hydrophobicity and the content of aliphatic and aromatic groups were negatively correlated with microbial quotient and positively correlated with TOC and TN content. In conclusion, the increased inputs of organic matter residues (such as litter and roots) could contribute to the relative accumulation of chemical resistance compounds with reduced human disturbance, which significantly enhanced chemical stability of soil organic carbon. Soil clay minerals played a key role in protecting soil organic carbon through the formation of mineral-organic compounds, which facilitate the stability of soil carbon storage and the long-term preservation of soil carbon.

杨传宝, 倪惠菁, 苏文会, 钟哲科, 张小平, 卞方圆, 李雯. 经营措施对毛竹林土壤不同组分有机碳、氮及化学结构的影响[J]. 应用生态学报, 2020, 31(1): 25-34.

YANG Chuan-bao, NI Hui-jing, SU Wen-hui, ZHONG Zhe-ke, ZHANG Xiao-ping, BIAN Fang-yuan, LI Wen. Effects of management measures on organic carbon, nitrogen and chemical structure of different soil fractions in Phyllostachys edulis plantations.[J]. Chinese Journal of Applied Ecology, 2020, 31(1): 25-34.

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经营措施对毛竹林土壤不同组分有机碳、氮及化学结构的影响

Effects of management measures on organic carbon, nitrogen and chemical structure of different soil fractions in Phyllostachys edulis plantations.

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