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秸秆全量还田下沼液替代化肥对潮土团聚体及结合有机碳的影响

王威 吴大付 唐蛟 殷金忠 潘飞飞 张喜焕 李俊娜

王 威, 吴大付, 唐 蛟, 殷金忠, 潘飞飞, 张喜焕, 李俊娜. 秸秆全量还田下沼液替代化肥对潮土团聚体及结合有机碳的影响[J]. 土壤通报, 2022, 53(4): 847 − 857 doi: 10.19336/j.cnki.trtb.2021113006
引用本文: 王 威, 吴大付, 唐 蛟, 殷金忠, 潘飞飞, 张喜焕, 李俊娜. 秸秆全量还田下沼液替代化肥对潮土团聚体及结合有机碳的影响[J]. 土壤通报, 2022, 53(4): 847 − 857 doi: 10.19336/j.cnki.trtb.2021113006
WANG Wei, WU Da-fu, TANG Jiao, YIN Jin-zhong, PAN Fei-fei, ZHANG Xi-huan, LI Jun-na. Effects of Chemical Fertilizer Substituted by Biogas Slurry on Aggregates and Associated Organic Carbon Characteristics in Fluvo-aquic Soil under Total Straw Incorporation[J]. Chinese Journal of Soil Science, 2022, 53(4): 847 − 857 doi: 10.19336/j.cnki.trtb.2021113006
Citation: WANG Wei, WU Da-fu, TANG Jiao, YIN Jin-zhong, PAN Fei-fei, ZHANG Xi-huan, LI Jun-na. Effects of Chemical Fertilizer Substituted by Biogas Slurry on Aggregates and Associated Organic Carbon Characteristics in Fluvo-aquic Soil under Total Straw Incorporation[J]. Chinese Journal of Soil Science, 2022, 53(4): 847 − 857 doi: 10.19336/j.cnki.trtb.2021113006

秸秆全量还田下沼液替代化肥对潮土团聚体及结合有机碳的影响

doi: 10.19336/j.cnki.trtb.2021113006
基金项目: 河南省科技攻关项目(212102110388)和河南省博士后科研项目(201903042)资助
详细信息
    作者简介:

    王威:王 威(1998−),男,河南驻马店人,硕士研究生,主要从事农业废弃物资源利用研究。E-mail: 714545704@qq.com

    通讯作者:

    E-mail: tangjiaoviva1988@126.com

  • 中图分类号: S156

Effects of Chemical Fertilizer Substituted by Biogas Slurry on Aggregates and Associated Organic Carbon Characteristics in Fluvo-aquic Soil under Total Straw Incorporation

  • 摘要:   目的  通过探究黄淮海平原秸秆全量还田条件下长期沼液替代化肥对潮土水稳性团聚体及结合有机碳影响,以期为改善土壤结构,增加土壤有机碳积累及推动种养结合循环农业发展提供科技支撑。  方法  采集长期持续进行不同沼液替代化肥处理(不施肥对照,CK;单一施用沼液,BS;单一施用化肥,CF;以及沼液半量替代化肥,BSCF)的表层(0 ~ 20 cm)土壤,利用湿筛法分离水稳性团聚体并测定不同粒径团聚结合有机碳分布变化情况。  结果  相较于对照,各施肥处理均能显著增加了外源有机碳投入,增加水稳性大团聚体质量组成比例,提高团聚体稳定性,其中沼液半量替代化肥处理 > 0.25 mm粒径水稳性团聚体质量组成比例提升效果最为明显,平均重量直径和几何平均直径最高,而团聚体破碎率和分形维数最低。不同处理团聚体结合有机碳含量随粒径增加表现出先升高后降低的趋势,其中以0.25 ~ 2 mm粒径最高。同时各施肥处理均增加各粒径团聚体结合有机碳含量,显著提高 > 0.25 mm粒径大团聚体结合有机碳贡献率,降低 < 0.053 mm粒径粘粉粒结合有机碳的贡献率。  结论  在黄淮海平原秸秆全量还田条件下通过沼液半量替代化肥不仅有利于水稳性大团聚体的形成和团聚体稳定性的提高,达到改善土壤结构的目的,而且能够调控各粒径团聚体结合有机碳贡献率,达到平衡土壤有机碳的维持和养分的释放目的。
  • 图  1  不同沼液替代化肥处理土壤水稳性团聚体稳定性参数

    同一图不同小写字母表示各处理之间差异显著(P < 0.05)。

    Figure  1.  Water-stable aggregate stability parameters in response to chemical fertilizer substituted by biogas slurry

    图  2  不同沼液替代化肥处理各粒径水稳性团聚体结合有机碳贡献率

    同一粒径不同小写字母表示处理间差异显著(P<0.05)。

    Figure  2.  Contribution rates of associated organic carbon within water-stable aggregates in response to chemical fertilizer substituted by biogas slurry

    表  1  不同沼液替代化肥处理氮磷钾和有机碳投入量

    Table  1.   Amounts of total nitrogen, phosphorus, potassium and organic carbon input provided by different treatments with chemical fertilizer substituted by biogas slurry

    处理
    Treatment
    沼液
    Biogas slurry
    化肥
    Chemical fertilizer
    施用量
    Application amount
    (m3 hm−2
    有机碳投入
    Organic carbon input
    (kg hm−2)
    N
    (kg hm−2)
    P2O5
    (kg hm−2)
    K2O
    (kg hm−2)
    N
    (kg hm−2)
    P2O5
    (kg hm−2)
    K2O
    (kg hm−2)
    CK 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
    CF 0.00 0.00 0.00 0.00 0.00 240.00 120.00 90.00
    BS 138.00 189.06 240.00 64.10 53.40 0.00 55.90 36.60
    BSCF 69.00 94.53 120.00 32.05 26.70 120.00 87.95 63.00
    下载: 导出CSV

    表  2  不同沼液替代化肥处理作物秸秆还田量

    Table  2.   Amounts of crop straw incorporation in response to chemical fertilizer substituted by biogas slurry

    处理
    Treatment
    秸秆类型
    Straw type
    年份
    Year
    2015 ~ 2016
    (t hm−2)
    2016 ~ 2017
    (t hm−2)
    2017 ~ 2018
    (t hm−2)
    2018 ~ 2019
    (t hm−2)
    2019 ~ 2020
    (t hm−2)
    2020 ~ 2021
    (t hm−2)
    CK 小麦秸秆 6.15 ± 0.24 5.85 ± 0.30 5.8 ± 0.40 5.73 ± 0.12 5.7 ± 0.44 5.54 ± 0.27
    玉米秸秆 15.75 ± 1.02 15.9 ± 0.94 15.16 ± 0.80 15.2 ± 0.82 15.04 ± 0.65 14.3 ± 1.09
    CF 小麦秸秆 7.52 ± 0.73 7.60 ± 0.99 7.26 ± 0.69 7.13 ± 0.57 7.82 ± 0.90 7.47 ± 0.75
    玉米秸秆 20.25 ± 1.38 20.08 ± 1.26 20.56 ± 1.20 21.88 ± 2.07 20.04 ± 1.85 18.92 ± 1.40
    BS 小麦秸秆 7.40 ± 0.71 7.42 ± 0.59 7.14 ± 0.57 7.08 ± 0.55 7.61 ± 0.87 7.35 ± 0.61
    玉米秸秆 20.02 ± 2.07 19.89 ± 1.84 20.04 ± 1.90 20.86 ± 2.07 19.87 ± 1.65 18.78 ± 1.82
    BSCF 小麦秸秆 7.65 ± 0.71 7.68 ± 0.64 7.3 ± 0.70 7.15 ± 0.61 7.88 ± 0.55 7.49 ± 0.70
    玉米秸秆 20.32 ± 2.07 20.14 ± 1.56 21.08 ± 1.85 22.00 ± 2.01 20.14 ± 1.80 19.13 ± 1.82
    下载: 导出CSV

    表  3  不同沼液替代化肥处理外源有机碳投入量

    Table  3.   Amounts of exogenous organic carbon input in response to chemical fertilizer substituted by biogas slurry

    处理
    Treatment
    秸秆有机碳投入量
    Straw organic carbon input
    (t hm−2)
    沼液有机碳投入量
    Biogas slurry organic carbon input
    (t hm−2)
    有机碳总投入量
    Total organic carbon input
    (t hm−2)
    CK 53.60 ± 1.98 a 0.00 53.60 ± 1.98 a
    CF 70.77 ± 2.24 b 0.00 70.77 ± 2.24 b
    BS 69.47 ± 1.51 b 2.27 71.74 ± 1.51 b
    BSCF 71.38 ± 1.03 b 1.13 72.51 ± 1.03 b
    下载: 导出CSV

    表  4  不同沼液替代化肥处理水稳性团聚体质量组成比例

    Table  4.   Mass proportion of each water-stable aggregate fraction in response to chemical fertilizer substituted by biogas slurry

    处理
    Treatment
    > 2 mm
    (%)
    0.25 ~ 2 mm
    (%)
    0.053 ~ 0.25 mm
    (%)
    < 0.053 mm
    (%)
    WR0.25
    (%)
    CK 1.82 ± 0.38 c 1.53 ± 0.10 d 5.11 ± 0.20 c 91.54 ± 0.53 a 3.35 ± 0.45 c
    CF 6.97 ± 1.01 b 8.64 ± 0.57 b 11.55 ± 1.97 a 72.84 ± 2.13 c 15.61 ± 1.07 b
    BS 8.39 ± 0.81 ab 6.68 ± 0.44 c 7.87 ± 1.29 b 77.06 ± 1.95 b 15.07 ± 0.92 b
    BSCF 8.44 ± 0.82 a 10.87 ± 1.47 a 7.59 ± 1.43 bc 73.09 ± 2.40 c 19.32 ± 1.41 a
      注:同一列不同小写字母表示处理间差异显著(P<0.05)。
    下载: 导出CSV

    表  5  不同沼液替代化肥处理各水稳性团聚体组分结合有机碳含量

    Table  5.   Concentration of organic carbon within water-stable aggregates in response to chemical fertilizer substituted by biogas slurry

    处理
    Treatment
    > 2 mm
    (g kg−1)
    0.25 ~ 2 mm
    (g kg−1)
    0.053 ~ 0.25 mm
    (g kg−1)
    < 0.053 mm
    (g kg−1)
    CK 6.87 ± 0.72 b 15.50 ± 1.44 c 6.00 ± 0.73 b 1.94 ± 0.61 c
    CF 9.90 ± 0.86 a 18.30 ± 0.94 b 13.26 ± 1.58 a 4.88 ± 0.97 b
    BS 11.33 ± 1.56 a 25.53 ± 1.91 a 15.11 ± 2.88 a 8.49 ± 1.64 a
    BSCF 9.89 ± 0.64 a 18.35 ± 1.47 b 15.24 + 4.58 a 7.43 + 1.49 a
      注:同一列不同小写字母表示处理间差异显著(P < 0.05)。
    下载: 导出CSV
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  • 收稿日期:  2021-11-30
  • 录用日期:  2022-03-01
  • 修回日期:  2022-01-25
  • 刊出日期:  2022-06-17

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