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长期施氮和降水减少对长白山阔叶红松林凋落物量的影响

谷越 王芳 陈鹏狮 张军辉 韩士杰 张雪 陈志杰 岳琳艳

谷越, 王芳, 陈鹏狮, 张军辉, 韩士杰, 张雪, 陈志杰, 岳琳艳. 长期施氮和降水减少对长白山阔叶红松林凋落物量的影响[J]. 北京林业大学学报, 2017, 39(4): 29-37. doi: 10.13332/j.1000-1522.20160171
引用本文: 谷越, 王芳, 陈鹏狮, 张军辉, 韩士杰, 张雪, 陈志杰, 岳琳艳. 长期施氮和降水减少对长白山阔叶红松林凋落物量的影响[J]. 北京林业大学学报, 2017, 39(4): 29-37. doi: 10.13332/j.1000-1522.20160171
GU Yue, WANG Fang, CHEN Peng-shi, ZHANG Jun-hui, HAN Shi-jie, ZHANG Xue, CHEN Zhi-jie, YUE Lin-yan. Effects of long-term nitrogen addition and precipitation decreasing on the litterfall production of broadleaved Korean pine forest in Changbai Mountains of northeastern China.[J]. Journal of Beijing Forestry University, 2017, 39(4): 29-37. doi: 10.13332/j.1000-1522.20160171
Citation: GU Yue, WANG Fang, CHEN Peng-shi, ZHANG Jun-hui, HAN Shi-jie, ZHANG Xue, CHEN Zhi-jie, YUE Lin-yan. Effects of long-term nitrogen addition and precipitation decreasing on the litterfall production of broadleaved Korean pine forest in Changbai Mountains of northeastern China.[J]. Journal of Beijing Forestry University, 2017, 39(4): 29-37. doi: 10.13332/j.1000-1522.20160171

长期施氮和降水减少对长白山阔叶红松林凋落物量的影响

doi: 10.13332/j.1000-1522.20160171
基金项目: 

国家自然科学基金重点项目 41575153

国家自然科学基金重点项目 41430639

国家自然科学基金重点项目 41330530

详细信息
    作者简介:

    谷越。主要研究方向:森林生态学。Email:guyue740147940@126.com  地址:100049  沈河区文化路72号中国科学院沈阳应用生态研究所森林生态与管理重点实验室

    责任作者:

    张军辉,研究员。主要研究方向:森林生态学。Email:jhzhang@iae.ac.cn  地址:同上

  • 中图分类号: S718.55+4.2

Effects of long-term nitrogen addition and precipitation decreasing on the litterfall production of broadleaved Korean pine forest in Changbai Mountains of northeastern China.

  • 摘要: 为了解持续氮沉降和降水减少条件下森林群落凋落物的量变化及其时间动态,以长白山阔叶红松林为研究对象,利用收集器法于2015年生长季(6—10月)对长期氮添加和降水控制实验平台3种不同处理样地(对照、施氮和减水施氮)内的凋落物进行了研究。主要分为红松叶、蒙古栎叶、其他树种叶、花果皮屑、枝5部分。本研究将凋落系数作为衡量林分生产凋落物能力的大小,比较各处理间凋落物的“净”差异。结果显示:各处理样地生长季内叶凋落量所占比重较大,可达到79%~81%,而枝和花果皮屑所占比重为19%~21%;凋落节律呈单峰型,凋落量峰值主要集中在9—10月份,降水减少会使其他树种凋落物的凋落期提前;不同组分凋落物对氮水控制响应不同,氮添加显著降低红松叶凋落物产量,降雨减少显著提高了总叶凋落物产量,减水施氮显著提高了其他树种叶凋落产量,而氮水控制对蒙古栎、枝和花果皮凋落物产量影响不显著;氮添加会抑制针叶树种的凋落物量,促进阔叶树种的凋落量,降水减少会促进各组分凋落物量。

     

  • 图  1  不同处理凋落物月动态

    Figure  1.  Monthly dynamics in litterfall production of different treatments

    图  2  不同处理凋落物组分月动态

    Figure  2.  Monthly dynamics of litterfall component production of different treatments

    表  1  各样地基本概况

    Table  1.   Basic situation of sample sites

    处理
    Treatment
    林分特征Stand characteristics土壤氮素含量Soil nitrogen (N) content
    每公顷株数
    Tree number per hectare
    胸高断面积
    Basal area at breast height/m2
    全氮
    Total N/%
    铵态氮
    Ammonium N/(mg·kg-1)
    硝态氮
    Nitrate N/(mg·kg-1)
    对照Control(CK)312±105.4410.80±0.801.18±0.0817.95±1.8219.02±1.07
    施氮N addition(NA)373±63.7911.15±1.121.25±0.1017.77±0.9420.85±1.05
    减水施氮Reduced precipitation and N addition(RN)285±84.518.91±1.331.14±0.0919.29±1.4221.13±1.52
    下载: 导出CSV

    表  2  不同处理各组分凋落量及占总量的百分比

    Table  2.   Litter mass of components(±STD)in different treatments and percentage in total

    处理
    Treatment
    凋落物组分/(t·hm-2) Litter component/(t·ha-1)总量Total
    红松叶
    Pinus koraiensis leaf(PK)
    蒙古栎叶
    Quercus mongolica leaf(QM)
    其他叶
    Other broadleaf(OT)

    Twig(TW)
    花果皮屑
    Reproductive organics and bark(ROB)
    CK0.75±0.25(27%)0.32±0.12(12%)1.12±0.12(41%)0.21±0.05(8%)0.34±0.07(12%)2.74±0.38(100%)
    NA0.43±0.05(16%)0.18±0.05(6%)1.56±0.13(57%)0.24±0.02(9%)0.35±0.06(13%)2.75±0.21(100%)
    RN0.47±0.21(18%)0.30±0.12(12%)1.30±0.03(51%)0.25±0.07(10%)0.23±0.01(9%)2.55±0.38(100%)
    注:括号内为该组分占总量的百分比。Note: data in brackets represent the component percentage in total.
    下载: 导出CSV

    表  3  各组分凋落物量与胸高断面积相关性分析

    Table  3.   Correlation analysis of component litterfall mass and basal area at breast height

    参数
    Parameter
    处理
    Treatment
    凋落物组分Litterfall component叶总量
    Leaf litterfall amount
    总量
    Total amount
    PKQMOTTWROB
    胸高断面积
    Basal area at breast height
    CK0.7590.9940.996*0.7780.7970.7900.654
    NA0.9780.999*0.9900.8720.9320.8630.921
    RN0.8690.7420.9880.9870.9630.9530.959
    注:*表示在P<0.05上显著相关。Note: * represents significant correlation at P<0.05 level.
    下载: 导出CSV

    表  4  不同处理各组分的凋落系数

    Table  4.   Litterfall coefficient of components in different treatments

    处理
    Treatment
    凋落物组分Litter component/(t·m-2)叶凋落物系数
    Leaf litterfall coefficient (LC)
    林分凋落系数
    Forest litterfall coefficient (FC)
    PKQMOTTWROB
    CK0.200 a(0.049)0.124 a(0.040)0.212 b(0.013)0.019 a(0.004)0.031 a(0.005)0.230 ab(0.020)0.253 a(0.027)
    NA0.115 b(0.014)0.172 ab(0.024)0.261 ab(0.003)0.022 a(0.004)0.031 a(0.005)0.194 b(0.018)0.247 a(0.007)
    RN0.149 ab(0.018)0.251 a(0.008)0.305 a(0.005)0.027 a(0.000)0.026 a(0.000)0.233 a(0.018)0.286 a(0.011)
    注:括号内为标准差,a、b代表各组分不同处理中差异显著(P<0.05)。Notes: Standard deviations are shown in brackets, a, b represent significant difference in each treatment among these components (P<0.05).
    下载: 导出CSV
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  • 收稿日期:  2016-05-17
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