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玉米残体分解对不同肥力棕壤团聚体组成及有机碳分布的影响

徐英德 汪景宽 王思引 孙雪冰 李君薇 张明垚 高晓丹

徐英德, 汪景宽, 王思引, 孙雪冰, 李君薇, 张明垚, 高晓丹. 玉米残体分解对不同肥力棕壤团聚体组成及有机碳分布的影响[J]. 中国生态农业学报(中英文), 2018, 26(7): 1029-1037. doi: 10.13930/j.cnki.cjea.171087
引用本文: 徐英德, 汪景宽, 王思引, 孙雪冰, 李君薇, 张明垚, 高晓丹. 玉米残体分解对不同肥力棕壤团聚体组成及有机碳分布的影响[J]. 中国生态农业学报(中英文), 2018, 26(7): 1029-1037. doi: 10.13930/j.cnki.cjea.171087
XU Yingde, WANG Jingkuan, WANG Siyin, SUN Xuebing, LI Junwei, ZHANG Mingyao, GAO Xiaodan. Effects of maize residue decomposition on aggregate composition and organic carbon distribution of different fertilities Brown soils[J]. Chinese Journal of Eco-Agriculture, 2018, 26(7): 1029-1037. doi: 10.13930/j.cnki.cjea.171087
Citation: XU Yingde, WANG Jingkuan, WANG Siyin, SUN Xuebing, LI Junwei, ZHANG Mingyao, GAO Xiaodan. Effects of maize residue decomposition on aggregate composition and organic carbon distribution of different fertilities Brown soils[J]. Chinese Journal of Eco-Agriculture, 2018, 26(7): 1029-1037. doi: 10.13930/j.cnki.cjea.171087

玉米残体分解对不同肥力棕壤团聚体组成及有机碳分布的影响

doi: 10.13930/j.cnki.cjea.171087
基金项目: 

国家自然科学基金项目 41601230

国家自然科学基金项目 41671293

国家自然科学基金项目 41601307

详细信息
    作者简介:

    徐英德, 主要从事土壤肥力与土壤生态研究。E-mail:yingdexu@126.com

    通讯作者:

    高晓丹, 主要从事土壤肥力与土壤化学研究。E-mail:wataxi221@126.com

  • 中图分类号: S158.5

Effects of maize residue decomposition on aggregate composition and organic carbon distribution of different fertilities Brown soils

Funds: 

the National Natural Science Foundation of China 41601230

the National Natural Science Foundation of China 41671293

the National Natural Science Foundation of China 41601307

More Information
  • 摘要: 以棕壤肥料长期定位试验(29 a)形成的高、低两种肥力水平棕壤为研究对象,采用不同部位玉米残体为试验试材,分别向两种土壤中加入玉米根茬和茎叶,进行田间原位培养试验,试验设置6个处理:低肥力土壤添加玉米根茬(LF+R)、低肥力土壤添加玉米茎叶(LF+S)、高肥力土壤添加玉米根茬(HF+R)、高肥力土壤添加玉米茎叶(HF+S)和未添加玉米残体的对照处理(LF,HF)。本研究旨在探明玉米根茬、茎叶添加后不同肥力土壤团聚体组成及有机碳分布的变化规律,为构建合理的秸秆还田与施肥措施,减少土壤侵蚀提供理论依据。结果表明:1)添加玉米残体后低肥力棕壤团聚体稳定性、较大级别团聚体(> 2 mm和1~2 mm)有机碳贡献率的提升幅度比高肥力棕壤大,说明低肥力土壤对外源有机质的响应更敏感,向大团聚体转化的速率更快。2)培养结束时,高肥力棕壤添加茎叶处理团聚体稳定性显著高于添加根茬处理,而添加根茬处理各粒级团聚体有机碳含量显著高于添加茎叶处理;低肥力棕壤中根茬和茎叶添加处理团聚体稳定性及有机碳含量之间差异不明显。3)在田间原位培养过程中,棕壤> 2 mm和1~2 mm团聚体所占比例和团聚体稳定性呈现出前期(0~360 d)快速增加,后期(360~720 d)趋于稳定的趋势。可以看出,玉米残体对土壤团聚体团聚化过程的作用强度逐渐减弱。以上结果表明,作物残体输入对棕壤团聚体组成及有机碳分布的影响与棕壤肥力水平和不同残体部位间的差异关系密切。
  • 图  1  不同肥力棕壤添加不同部位玉米残体不同时间后土壤团聚体平均重量直径(MWD)和几何平均直径(GMD)值的变化

    LF:低肥力棕壤; HF:高肥力棕壤; R:玉米根茬; S:玉米茎叶。不同小写字母表示同一处理不同时间差异显著(P < 0.05), 不同大写字母表示同一时间不同处理差异显著(P < 0.05)。

    Figure  1.  Changes of mean weight diameter (MWD) and geometric mean diameter (GMD) values of soil aggregates in different fertility brown soils added with different parts of maize residues for different times

    LF: low fertility brown soil; HF: high fertility brown soil; R: maize root; S: maize stem and leaf. Different lowercase letters mean significant differences at 5% level among different incubation times for the same treatment; different capital letters mean significant differences at 5% level among different treatments at the same incubation time.

    图  2  不同肥力棕壤添加不同部位玉米残体不同时间后土壤团聚体分形维数(D)值的变化

    LF:低肥力棕壤; HF:高肥力棕壤; R:玉米根茬; S:玉米茎叶。不同小写字母表示同一处理不同时间差异显著(P < 0.05), 不同大写字母表示同一时间不同处理差异显著(P < 0.05)。

    Figure  2.  Changes of fractal dimension values (D) of soil aggregates in different fertility brown soils added with different parts of maize residues for different times

    LF: low fertility brown soil; HF: high fertility brown soil; R: maize root; S: maize stem and leaf. Different lowercase letters mean significant differences at 5% level among different incubation times for the same treatment; different capital letters mean significant differences at 5% level among different treatments at the same incubation time.

    图  3  不同肥力棕壤添加不同部位玉米残体后不同时间土壤有机碳含量的变化

    LF:低肥力棕壤; HF:高肥力棕壤; R:玉米根茬; S:玉米茎叶。不同小写字母表示同一处理不同时间差异显著(P < 0.05), 不同大写字母表示同一时间不同处理差异显著(P < 0.05)。

    Figure  3.  Changes of soil organic carbon contents in different fertility brown soils added with different parts of maize residues for different times

    LF: low fertility brown soil; HF: high fertility brown soil; R: maize root; S: maize stem and leaf. Different lowercase letters mean significant differences at 5% level among different incubation times for the same treatment; different capital letters mean significant differences at 5% level among different treatments at the same incubation time.

    图  4  不同肥力棕壤添加不同部位玉米残体不同时间后土壤各粒级团聚体有机碳的相对贡献率

    LF:低肥力棕壤; HF:高肥力棕壤; R:玉米根茬; S:玉米茎叶。

    Figure  4.  Relative contribution rates of organic carbon in different sizes of aggregates in different fertility brown soils added with different parts of maize residues for different times

    LF: low fertility brown soil; HF: high fertility brown soil; R: maize root; S: maize stem and leaf.

    表  1  供试棕壤、玉米残体基本理化性质

    Table  1.   Basic characteristics of soil samples and maize residues

    项目
    Item
    有机碳
    Soil organic carbon (g·kg-1)
    全氮
    Total nitrogen
    (g·kg-1)
    碳氮比
    C/N
    低肥力棕壤
    Low fertility brown soil
    11.21±0.14b 1.11±0.05b 10.16±0.58a
    高肥力棕壤
    High fertility brown soil
    17.61±0.40a 2.19±0.00a 8.04±0.04b
    玉米根茬
    Maize root
    400.76±0.20B 12.55±0.30A 31.94±0.77A
    玉米茎叶
    Maize stem and leaf
    430.79±0.03A 13.89±0.27A 31.02±0.56A
      同列不同小写字母表示不同肥力水平棕壤间差异显著(P < 0.05), 同列不同大写字母表示不同部位玉米残体间差异显著(P < 0.05)。Different lowercase letters mean significant differences at 5% level between different brown soils; different capital letters mean significant differences at 5% level between different residue parts of maize.
    下载: 导出CSV

    表  2  不同肥力棕壤添加不同部位玉米残体不同时间后土壤团聚体的组成变化

    Table  2.   Dynamic changes of soil aggregates composition in different fertility brown soils added with different parts of maize residues for different times

    %
    培养时间
    Incubation time (d)
    处理
    Treatment
    团聚体级别Aggregates size (mm)
    > 2 1~2 0.25~1 < 0.25
    0 LF 14.07±0.86cH 23.27±0.32bCD 55.31±0.61aA 7.34±0.14dC
    HF 24.37±0.11bF 22.11±0.69cEF 43.15±1.27aCD 10.37±0.16dAB
    LF+R 14.23±1.20cH 22.36±1.24bEF 54.19±1.09aAB 9.22±0.51dB
    LF+S 14.53±0.36cH 21.49±0.41bF 53.98±0.16aAB 10.00±0.34dB
    HF+R 25.00±0.99bF 22.87±0.12cDE 42.82±0.55aCD 9.31±0.31dB
    HF+S 24.17±1.01bF 22.11±0.81cEF 41.99±0.57aCD 11.73±0.28dA
    360 LF 19.12±0.96cG 24.50±0.85bCD 51.38±1.10aB 4.99±0.57dD
    HF 28.22±0.19bE 24.61±1.25cCD 43.71±1.16aC 3.47±0.21dEF
    LF+R 30.41±0.55bDE 26.06±0.15cAB 41.07±0.79aCD 2.46±0.50dFG
    LF+S 33.57±0.11bC 27.57±0.05cAB 36.74±0.54aEF 2.12±0.64dFG
    HF+R 37.71±1.48bA 24.61±1.03cCD 34.45±1.42aFG 3.23±0.54dEF
    HF+S 36.61±1.00bAB 24.40±0.52cCD 34.86±0.69aF 4.14±0.56dDE
    720 LF 20.30±0.77cG 22.29±0.30bEF 53.31±1.47aAB 4.10±0.56dDE
    HF 28.66±1.88bE 28.03±0.89bAB 40.82±1.86aCD 2.49±0.99cFG
    LF+R 31.60±1.26bCD 26.18±0.45cAB 40.06±1.52aCD 2.16±0.10dFG
    LF+S 33.14±1.34bCD 25.47±0.44cAB 39.61±1.26aDE 1.78±0.23dGH
    HF+R 33.97±0.81bBC 29.95±2.48cA 34.24±2.29aFG 2.17±0.64cFG
    HF+S 37.79±0.40bA 29.54±0.55cA 31.12±0.71aG 1.55±1.04dH
      LF:低肥力棕壤; HF:高肥力棕壤; R:玉米根茬; S:玉米茎叶。同行不同小写字母表示同一处理不同团聚体级别差异显著(P < 0.05), 同列不同大写字母表示同一团聚体级别不同处理不同时间差异显著(P < 0.05)。LF: low fertility brown soil; HF: high fertility brown soil; R: maize root; S: maize stem and leaf. Different lowercase letters mean significant differences at 5% level among different sizes of aggregates for the same treatment; different capital letters mean significant differences at 5% level among different treatments at different incubation times for the same aggregates size.
    下载: 导出CSV

    表  3  不同肥力棕壤添加不同部位玉米残体不同时间后土壤团聚体有机碳含量的变化

    Table  3.   Changes of aggregate-associated organic carbon contents in different fertility brown soils added with different parts of maize residues for different times

    g·kg-1
    培养时间
    Incubation time (d)
    处理
    Treatment
    团聚体级别Aggregates size (mm)
    > 2 1~2 0.25~1 < 0.25
    360 LF 10.36±0.36bF 10.40±0.21bF 10.81±0.17abD 10.94±0.12aE
    HF 13.81±0.24cD 14.06±0.61bcD 14.80±0.46bC 15.89±0.44aB
    LF+R 10.89±0.37bcE 10.50±0.06cF 11.16±0.20bD 11.98±0.13aDE
    LF+S 11.18±0.27abE 10.88±0.36bEF 11.26±0.77abD 13.04±3.79aD
    HF+R 16.36±0.96bA 16.65±0.25bA 17.58±0.13abA 18.04±0.77aA
    HF+S 15.45±0.32bC 15.29±0.24bB 16.76±0.50aAB 15.77±0.26bB
    720 LF 10.70±0.33bEF 10.51±0.44bF 10.88±0.41bD 12.11±0.30aD
    HF 14.11±0.24cD 13.59±0.09dD 14.51±0.23bC 15.00±0.21aBC
    LF+R 11.31±0.18bE 11.48±0.45bE 11.48±0.46bD 12.28±0.28aD
    LF+S 11.10±0.31bE 11.36±0.80abE 11.40±0.14abD 12.18±0.26aD
    HF+R 16.02±0.46abB 15.78±0.50bB 16.51±1.03abB 17.17±0.62aA
    HF+S 14.93±0.40abC 14.89±0.22abC 15.31±0.56aC 14.40±0.28bC
      LF:低肥力棕壤; HF:高肥力棕壤; R:玉米根茬; S:玉米茎叶。同行不同小写字母表示同一处理不同团聚体级别差异显著(P < 0.05), 同列不同大写字母表示同一团聚体级别不同处理不同时间差异显著(P < 0.05)。LF: low fertility brown soil; HF: high fertility brown soil; R: maize root; S: maize stem and leaf. Different lowercase letters mean significant differences at 5% level among different sizes of aggregates for the same treatment; different capital letters mean significant differences at 5% level among different treatments at different incubation times for the same aggregates size.
    下载: 导出CSV
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  • 收稿日期:  2017-11-24
  • 录用日期:  2018-02-03
  • 刊出日期:  2018-07-01

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