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华北低丘陵山区人工林土壤微生物生物量碳氮变化及其影响因素

庄静静 鲜靖苹 王晓冰 李振华 程翠

庄静静,鲜靖苹,王晓冰,等. 华北低丘陵山区人工林土壤微生物生物量碳氮变化及其影响因素 [J]. 福建农业学报,2023,38(12):1459−1465 doi: 10.19303/j.issn.1008-0384.2023.12.010
引用本文: 庄静静,鲜靖苹,王晓冰,等. 华北低丘陵山区人工林土壤微生物生物量碳氮变化及其影响因素 [J]. 福建农业学报,2023,38(12):1459−1465 doi: 10.19303/j.issn.1008-0384.2023.12.010
ZHUANG J J, XIAN J P, WANG X B, et al. Microbial Biomass Carbon and Nitrogen at Man-made Forests in Northern China Hilly Areas [J]. Fujian Journal of Agricultural Sciences,2023,38(12):1459−1465 doi: 10.19303/j.issn.1008-0384.2023.12.010
Citation: ZHUANG J J, XIAN J P, WANG X B, et al. Microbial Biomass Carbon and Nitrogen at Man-made Forests in Northern China Hilly Areas [J]. Fujian Journal of Agricultural Sciences,2023,38(12):1459−1465 doi: 10.19303/j.issn.1008-0384.2023.12.010

华北低丘陵山区人工林土壤微生物生物量碳氮变化及其影响因素

doi: 10.19303/j.issn.1008-0384.2023.12.010
基金项目: 河南省自然科学基金项目(212300410219);河南省科技攻关项目(232102111008、232102321054));河南省高等学校重点科研项目(22B180014)
详细信息
    作者简介:

    庄静静(1988 —),女,博士,讲师,主要从事森林生态学相关研究,E-mail:zhuangjingnd@126.com

    通讯作者:

    程翠(1985 —),女,助理研究员,主要从事农业生态环境修复相关研究,E-mail:66394564@qq.com

  • 中图分类号: S714

Microbial Biomass Carbon and Nitrogen at Man-made Forests in Northern China Hilly Areas

  • 摘要:   目的  土壤微生物是土壤中重要的存在,土壤中的微生物量碳和微生物量氮能直接或间接参与土壤理化过程,是维持土壤质量的重要指标,可综合反映土壤肥力特性和生物活性。  方法  在河南省济源市黄河小浪底生态系统定位站内选择3种人工纯林,包括刺槐(Robinia pseudoacacia)林、栓皮栎(Quercus variabilis)林和侧柏(Platyclodus orientalis)林,采集未分解枯落物层(L层)、半分解/腐殖化枯落物层(F/H层)以及矿质土层(0~10、10~20 cm)的土壤样品,测定微生物生物量碳(Microbial biomass carbon, MBC)、微生物生物量氮(Microbial biomass nitrogen, MBN)、MBC/MBN以及枯落物层和土壤层总碳(Total carbon, TC)、总氮(Total nitrogen, TN)、可溶性有机碳(Dissolved organic carbon, DOC)和可溶性有机氮(Dissolved organic nitrogen, DON),研究探讨土壤微生物生物量(Soil microbial biomass, SMB)与树种、土深的关系及其机理。  结果  (1)在枯落物层,3种林型的TC最高值均出现在F/H层,而TN的最高值则均出现在L层;3种林型TC和TN均表现为F/H层>L层>0~10 cm、10~20 cm土层,差异显著(P<0.05)。3种林型的DOC表现为枯落物层高于矿质土壤层,DON为矿质土壤层高于枯落物层。枯落物层3种林分之间的DOC含量均表现为栓皮栎林显著高于刺槐林,二者与侧柏林之间差异不显著(P>0.05)。(2)在枯落物层,3种林型的MBC均表现为F/H层高于L层,表现为刺槐林>栓皮栎林>侧柏林。在矿质土层中,3种林型的MBC均为0~10 cm高于10~20 cm土层,表现为栓皮栎林>刺槐林>侧柏林,同一土层的刺槐林和栓皮栎林之间差异不显著(P>0.05)。枯落物层及矿质土层的MBN均表现为栓皮栎林>刺槐林>侧柏林。栓皮栎林在各个土层中均是MBN最高的树种,且与侧柏林之间差异显著(P<0.05)。(3)L和F/H层的MBC/MBN比值相差不大,而在矿质土层中,随土深增加MBC/MBN呈上升趋势。在矿质土层,3种林型MBC/MBN均表现为10~20 cm显著高于0~10 cm;在0~10 cm,3种林型之间差异不显著(P>0.05),在10~20 cm,刺槐林显著高于侧柏林(P>0.05),而与栓皮栎林之间差异不显著(P<0.05)。(4)相关性分析表明,3种林型的MBC均与总碳、总氮呈极显著正相关(P<0.01),其中栓皮栎林MBC与总碳的相关系数最大,为0.959。刺槐林和栓皮栎林的C/N与总碳、总氮呈负相关,而侧柏林的C/N则与总碳、总氮呈正相关,相关系数分别为0.512和0.524。  结论  在华北低丘陵山区种植栓皮栎对土壤的生态恢复效果较好,更有利于生态系统的碳氮循环。
  • 图  1  不同林分及土层/枯落物层总碳、总氮、可溶性有机碳和可溶性有机氮的变化特征

    不同小写字母表示同一土层/枯落物层不同林型之间差异显著(P<0.05),不同大写字母表示同一林型不同土层/枯落物层之间差异显著(P<0.05),下同。

    Figure  1.  Changes in TC, TN, DOC and DON at test sites

    Data with different lowercase letters indicate significant difference between different forests on same soil or littered layer (P<0.05); those with different uppercase letters, significant difference between different layers at same forest (P<0.05).

    图  2  不同林型枯落物层及土壤层的微生物生物量碳

    Figure  2.  MBC in littered and mineral soil layers at different forests

    图  3  不同林型枯落物层及土壤层的微生物生物量氮

    Figure  3.  MBN in littered and mineral soil layers at different forests

    图  4  不同林型枯落物层及土壤层的微生物生物量碳氮比

    Figure  4.  C/N ratio of microbial biomass in littered and mineral soil layers at different forests

    表  1  样地基本情况

    Table  1.   Basic information on sampling sites

    林型
    Forest type
    林龄
    Stand age/a
    坡向
    Aspect
    坡度
    Slope/(°)
    平均树高
    Mean tree height/m
    平均胸径
    Mean breast diameter/cm
    林分密度
    Stand density/(株·hm−2
    郁闭度
    Canopy density
    刺槐纯林R45南坡209.66±0.5711.35±0.671800±1000.82±0.02
    栓皮栎纯林Q43南坡238.75±0.2510.78±0.301900±1000.86±0.06
    侧柏纯林P42北坡229.86±0.1610.64±0.522900±1000.90±0.04
    下载: 导出CSV

    表  2  土壤微生物生物量碳、氮及其比值与理化性质相关性分析

    Table  2.   Correlation between MBC, MBN, MBC/MBN, and physiochemical properties of soil

    林型
    Forest
    type
    指标
    Index
    总碳
    Total
    carbon
    总氮
    Total
    nitrogen
    可溶性
    有机碳
    Dissolved
    organic
    carbon
    可溶性
    有机氮
    Dissolved
    organic
    nitrogen
    刺槐
    林R
    MBC0.941**0.957**0.1690.120
    MBN0.750**0.750**0.3890.142
    MBC/MBN−0.255−0.254−0.594*0.011
    栓皮
    栎林Q
    MBC0.959**0.950**0.3210.293
    MBN0.778**0.744**0.4500.442
    MBC/MBN−0.307−0.279−0.607*−0.381
    侧柏
    林P
    MBC0.912**0.892**−0.043−0.095
    MBN0.681*0.655*−0.2280.188
    MBC/MBN0.5120.5240.425−0.630*
    *表示在0.05水平上呈显著相关,**表示在0.01水平上呈极显著相关。
    *indicates significant difference at P<0.05; **indicates extremely significant difference at P<0.01.
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-01-07
  • 修回日期:  2023-06-18
  • 网络出版日期:  2023-11-20
  • 刊出日期:  2023-12-28

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