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郭天斗 赵亚楠 周玉蓉 王红梅

引用本文: 郭天斗,赵亚楠,周玉蓉,王红梅. 宁夏东部荒漠草原灌丛引入过程中土壤呼吸响应特征. 草业科学, 2019, 36(12): 3052-3064. doi: shu
Citation:  GUO T D, ZHAO Y N, ZHOU Y R, WANG H M. Responses of soil respiration to shrub introduction in the desert steppe of the eastern Ningxia. Pratacultural Science, 2019, 36(12): 3052-3064. doi: shu

宁夏东部荒漠草原灌丛引入过程中土壤呼吸响应特征

    作者简介: 郭天斗(1995-),男,甘肃古浪人,在读硕士生,研究方向为草地资源、生态与环境。E-mail: ;
    通讯作者: 王红梅,
  • 基金项目: 国家自然科学基金项目(31860677);国家重点研发计划课题(2016YFC0500505);宁夏高等学校一流学科建设资助项目(NXYLXK2017A01);宁夏科技支撑计划项目(2015惠民计划)

摘要: 为探究宁夏东部荒漠草原灌丛引入过程中土壤呼吸响应特征,选取封育草地、放牧地及不同灌丛年限(22、12、3年)和间距(40、6、2 m)的柠条灌丛地(Caragana korshinskii),开展草原–放牧–灌丛引入中土壤呼吸、水分、碳氮、微生物及相关研究。结果表明: 0 – 10 cm土层土壤水分具有明显季节变化,灌丛引入加剧深层土壤水分消耗。土壤呼吸响应表层土壤水分的季节变化,灌丛引入后土壤呼吸减弱,不同年限灌丛地与封育、放牧草地无显著差异(P > 0.05),但随间距的缩小差异显著(P < 0.05)。土壤有机碳在封育、放牧草地随土层加深而降低,且随着灌丛年限的增大和间距的缩小而降低;全氮在封育草地都较高,而放牧地含量较低,随着灌丛年限的增大和间距的缩小而增加,但差异不明显(P > 0.05)。灌丛引入使各菌群数量显著增加(P < 0.05),但在间距最小(2 m)时显著降低。随着灌丛引入土壤微生物量碳降低,且随年限增长而增加,而在生长到一定年限又随间距的缩小而降低;土壤呼吸熵(qCO2)随年限的增加而减小,随间距的缩小而增大。土壤呼吸与土壤水分、土壤微生物量碳正相关,且与土壤水分极显著正相关(P < 0.01),与土壤有机碳、全氮、微生物数量负相关,其与放线菌数量显著负相关(P < 0.05)。

English

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      胡向敏侯向阳陈海军丁勇运向军武自念 . 不同放牧制度下短花针茅荒漠草原土壤碳储量动态. 草业科学, 2014, 8(12): 2205-2211. doi: 

  • 重庆欢乐生肖

    图 1  重庆欢乐生肖 盐池县2017年日气温变化与1987–2017年月均及当年各月降水量分布

    Figure 1.  The change of daily temperature in 2017 and the distribution patterns of monthly precipitation from 1987 to 2017 and every month in 2017 in Yanchi County

    图 2  灌丛引入过程土壤含水量垂直特征

    Figure 2.  重庆欢乐生肖 Vertical characteristics of soil’s moisture content during shrub introduction

    图 3  灌丛引入过程土壤水分季节动态

    Figure 3.  Seasonal dynamics of soil moisture during shrub introduction

    图 4  灌丛引入过程土壤呼吸季节动态变化

    Figure 4.  重庆欢乐生肖 Seasonal dynamics of soil respiration during shrub introduction

    图 5  灌丛引入过程年均土壤呼吸速率变化

    Figure 5.  Changes of annual soil respiration rate during shrub introduction

    图 6  重庆欢乐生肖 灌丛引入过程土壤微生物数量特征

    Figure 6.  重庆欢乐生肖 Quantitative characteristics of soil microorganisms during shrub introduction

    图 7  重庆欢乐生肖 灌丛引入过程土壤微生物量碳及呼吸熵变化

    Figure 7.  重庆欢乐生肖 Changes of soil microbial biomass carbon and respiratory quotients during shrub introduction

    表 1  重庆欢乐生肖 样地基本情况

    Table 1.  重庆欢乐生肖 description of the sampling sites

    样地
    Sampling site
    处理
    Treatment
    经度
    Longitude
    纬度
    Latitude
    优势植物
    Dominant plant species
    封育草地(EG)
    Enclosed grassland
    封育14年
    14-year enclosed
    107°14' E 37°53' N 猪毛蒿(Artemisia scoparia)、白草(Pennisetum centrasiaticum)、赖草(Leymus secalimus)、虫实(Corispermum hyssopifolium)
    放牧草地(GG)
    Grazing grassland
    适度放牧
    Moderate grazing
    107°18' E 37°52' N 刺蓬(Salsola ruthenica)、猪毛蒿(Artemisia scoparia)、白草(Pennisetum centrasiaticum)、骆驼蓬(Peganum harmala)
    3年灌丛(SY3)
    3-year shrubs
    间距6 m
    Planting space: 6 m
    107°21' E 37°50' N 猪毛蒿(Artemisia scoparia)、赖草(Leymus secalimus)、牛枝子(Lespedeza potaninii)、柠条(Caragana korshinskii)
    12年灌丛(SY12)
    12-year shrubs
    间距6 m
    Planting space: 6 m
    107°20' E 37°51' N 牛枝子(Lespedeza potaninii)、猪毛蒿(Artemisia scoparia)、
    短花针茅(Stipa breviflora)、白草(Pennisetum centrasiaticum)、柠条(Caragana korshinskii)
    22年灌丛(SY22)
    22-year shrubs
    间距6 m
    Planting space: 6 m
    107°17' E 37°51' N 牛枝子(Lespedeza potaninii)、猪毛蒿(Artemisia scoparia)、
    柠条(Caragana korshinskii)
    40米间距(SI40)
    Shrub interval: 40 m
    1990年种植
    Planting in 1990
    107°21' E 37°55' N 猪毛蒿(Artemisia scoparia)、牛枝子(Lespedeza potaninii)、
    柠条(Caragana korshinskii)、沙生针茅(Stipa glareosa)
    6米间距(SI6)
    Shrub interval: 6 m
    1994年种植
    Planting in 1994
    107°17' E 37°51' N 牛枝子(Lespedeza potaninii)、猪毛蒿(Artemisia scoparia)、
    柠条(Caragana korshinskii)
    2米间距(SI2)
    Shrub interval: 2 m
    1992年种植
    Planting in 1992
    107°17' E 37°50' N 猪毛蒿(Artemisia scoparia)、白草(Pennisetum centrasiaticum)、
    柠条(Caragana korshinskii)
    下载: 导出CSV

    表 2  重庆欢乐生肖 草原–放牧–不同年限灌丛引入过程土壤有机碳、全氮变化

    Table 2.  Soil organic carbon and total nitrogen during grassland–grazing–different shrub years

    项目 Item土层 Soil layer/cm草原–放牧–不同年限 Grassland – grazing – different shrub years
    EGGGSY3SY12SY22
    有机碳
    Soil organic carbon/(g·kg–1)
    0 – 201.92 ± 0.11Bb3.08 ± 0.10Aa3.33 ± 0.30Ba2.95 ± 0.21Aa3.53 ± 0.10Ba
    20 – 40 4.80 ± 0.99Aa2.61 ± 0.41Ab3.75 ± 0.28ABab3.04 ± 0.04Aab5.12 ± 0.38Aa
    40 – 60 3.30 ± 0.71ABbc1.81 ± 0.08Bc3.47 ± 0.17Bb2.30 ± 0.31Abc5.18 ± 0.24Aa
    60 – 80 2.81 ± 0.21Bb1.91 ± 0.17Bc4.15 ± 0.18Aa3.45 ± 0.27Aab2.84 ± 0.25Ab
    80 – 1001.87 ± 0.35Bbc1.09 ± 0.11Cc3.19 ± 0.27Ba2.86 ± 0.47Aab2.47 ± 0.11Aab
    全氮
    Total
    nitrogen/(g·kg–1)
    0 – 200.42 ± 0.06ABa0.29 ± 0.03Aa0.28 ± 0.06Aa0.28 ± 0.07Aa0.42 ± 0.03Aa
    20 – 40 0.69 ± 0.14Aa0.23 ± 0.07Ab0.27 ± 0.01Ab0.45 ± 0.06Aab0.52 ± 0.08Aab
    40 – 60 0.43 ± 0.03ABb0.32 ± 0.03Abc0.24 ± 0.01Ac0.24 ± 0.04Ac0.56 ± 0.01Aa
    60 – 80 0.53 ± 0.08ABa0.21 ± 0.03Ab0.29 ± 0.06Ab0.30 ± 0.04Ab0.60 ± 0.06Aa
    80 – 1000.24 ± 0.04Bab0.19 ± 0.06Ab0.31 ± 0.06Aab0.28 ± 0.08Aab0.45 ± 0.06Aa
     同列不同大写字母表示同一样地不同土层间差异显著(P < 0.05),同行不同小写字母表示同一土层不同样地间差异显著(P < 0.05)。表3同。
     Different capital letters indicate significant difference among different layers in each sample plots at the 0.05 level, and different lowercase letters indicate significant difference among all sample plots of the same layer at the 0.05 level; similarly representations are present in Table 3.
    下载: 导出CSV

    表 3  草原–放牧–不同间距灌丛引入过程土壤有机碳和全氮变化

    Table 3.  重庆欢乐生肖 Soil organic carbon and total nitrogen during grassland – grazing – different shrub intervals

    项目 Item土层 Soil layer/cm草原–放牧–不同间距 Grassland – grazing – different shrub intervals
    EGGGSI40SI6SI2
    有机碳
    Soil organic
    carbon/(g·kg–1)
    0 – 201.92 ± 0.11Bc3.08 ± 0.10Ab3.61 ± 0.14BCa3.53 ± 0.10Bab3.19 ± 0.13Aab
    20 – 40 4.80 ± 0.99Aab2.61 ± 0.41Ac4.19 ± 0.24ABabc5.12 ± 0.38Aa2.84 ± 0.20Bbc
    40 – 60 3.30 ± 0.71ABbc1.81 ± 0.08Bc4.79 ± 0.35Aab5.18 ± 0.24Aa2.55 ± 0.11Cc
    60 – 80 2.81 ± 0.21Ba1.91 ± 0.17Bb3.21 ± 0.25CDa2.84 ± 0.25BCa3.01 ± 0.18Aa
    80 – 1001.87 ± 0.35Bab1.09 ± 0.11Cb2.63 ± 0.16Da2.47 ± 0.11Ca2.67 ± 0.17BCa
    全氮
    Total
    nitrogen/(g·kg–1)
    0 – 200.42 ± 0.06ABa0.29 ± 0.03Aab0.27 ± 0.03Ab0.42 ± 0.03Aa0.35 ± 0.01Aab
    20 – 40 0.69 ± 0.14Aa0.23 ± 0.07Ab0.35 ± 0.07Aab0.52 ± 0.08Aab0.26 ± 0.07Ab
    40 – 60 0.43 ± 0.03ABb0.32 ± 0.03Ab0.34 ± 0.04Ab0.56 ± 0.01Aa0.21 ± 0.01Ac
    60 – 80 0.53 ± 0.08ABab0.21 ± 0.03Ac0.24 ± 0.03Ac0.60 ± 0.06Aa0.29 ± 0.06Abc
    80 – 1000.24 ± 0.04Ba0.19 ± 0.06Aa0.25 ± 0.08Aa0.45 ± 0.06Aa0.25 ± 0.03Aa
    下载: 导出CSV

    表 4  灌丛引入土壤呼吸与土壤水分、有机碳、全氮及土壤微生物的相关分析

    Table 4.  重庆欢乐生肖 Correlation analysis of soil respiration, soil moisture, organic carbon, total nitrogen, and soil microorganism under different shrub introduction conditions

    项目 Item土壤呼吸 Soil respiration
    rP
    0 – 10 cm土壤水分 0 – 10 cm soil moisture 0.372 0.003**
    0 – 20 cm土壤有机碳 0 – 20 cm soil organic carbon –0.378 0.148
    0 – 20 cm土壤全氮 0 – 20 cm soil total nitrogen –0.358 0.173
    放线菌 Soil actinomycetes –0.619 0.011*
    真菌 Soil fungus –0.238 0.374
    细菌 Soil bacteria –0.323 0.223
    微生物生物量碳 Soil microbial carbon 0.046 0.866
     *表示显著相关(P < 0.05);**表示极显著相关(P < 0.01)。
     * and ** indicate significant correlation at 0.05 and 0.01 levels, respectively.
    下载: 导出CSV
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                          • 通讯作者:  王红梅,
                          • 收稿日期:  2018-08-02
                          • 刊出日期:  2018-12-01
                          通讯作者: 陈斌,
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