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禾本科绿肥还田对盐碱地棉田土壤碳氮及微生物量碳氮的影响

王敬宽 高枫舒 张楷悦 李帅 柳新伟

王敬宽, 高枫舒, 张楷悦, 李帅, 柳新伟. 禾本科绿肥还田对盐碱地棉田土壤碳氮及微生物量碳氮的影响[J]. 中国生态农业学报 (中英文), 2023, 31(3): 396−404 doi: 10.12357/cjea.20220221
引用本文: 王敬宽, 高枫舒, 张楷悦, 李帅, 柳新伟. 禾本科绿肥还田对盐碱地棉田土壤碳氮及微生物量碳氮的影响[J]. 中国生态农业学报 (中英文), 2023, 31(3): 396−404 doi: 10.12357/cjea.20220221
WANG J K, GAO F S, ZHANG K Y, LI S, LIU X W. Effects of returning gramineous green manure to cotton field on soil carbon and nitrogen in saline alkali soil[J]. Chinese Journal of Eco-Agriculture, 2023, 31(3): 396−404 doi: 10.12357/cjea.20220221
Citation: WANG J K, GAO F S, ZHANG K Y, LI S, LIU X W. Effects of returning gramineous green manure to cotton field on soil carbon and nitrogen in saline alkali soil[J]. Chinese Journal of Eco-Agriculture, 2023, 31(3): 396−404 doi: 10.12357/cjea.20220221

禾本科绿肥还田对盐碱地棉田土壤碳氮及微生物量碳氮的影响

doi: 10.12357/cjea.20220221
基金项目: 国家重点研发计划项目(2021YFD190090308)和山东省现代农业产业技术体系棉花岗位创新团队(SDAIT-03-06)资助
详细信息
    作者简介:

    王敬宽, 主要研究方向为农业资源与环境。E-mail: wjk18253088030@163.com

    通讯作者:

    柳新伟, 主要研究方向为农业生态学。E-mail: sdxw@163.com

  • 中图分类号: S142

Effects of returning gramineous green manure to cotton field on soil carbon and nitrogen in saline alkali soil

Funds: This study was supported by the National Key R&D Program of China (2021YFD190090308), and Shandong Modern Agricultural Industry Technology System Cotton Post Innovation Team (SDAIT-03-06).
More Information
  • 摘要: 为探讨绿肥还田对盐碱地棉田土壤碳氮和微生物量碳氮的影响, 于2018—2019年选取黑麦草‘冬牧70’和大麦‘驻大麦4号’ 2种耐低温耐盐碱的禾本科绿肥进行原位还田试验, 设置冬闲农田-棉花(T1)、黑麦草-棉花(T2)和大麦-棉花(T3) 3个处理, 测定不同处理和绿肥还田后不同时期(15 d、50 d、110 d和180 d)棉田土壤有机碳(SOC)、土壤全氮(TN)、土壤微生物量碳(SMBC)和微生物量氮(SMBN)的含量, 并计算土壤微生物熵(SMQ)和土壤微生物量碳氮比(SMBC/SMBN)值。结果表明, T2和T3均能显著增加SOC、TN含量, 并在180 d时达最大值9.50 g∙kg−1、798.84 mg∙kg−1和9.91g∙kg−1、759.34 mg∙kg−1, 分别显著高于T1处理。T2和T3的SMBC、SMBN含量在整个还田期的变化动态基本一致, 呈前期稳定增长且显著高于T1, 后期有所降低且在110 d时略低于T1的变化动态; 并且均在50 d时达最大值, 此时较T1分别高出81.46%、47.76%和77.33%、43.13%; 同时还田后T2处理不同时期的SMBC和SMBN含量均高于T3。SMQ不同处理的变化趋势与SMBC一致, 2种绿肥处理除110 d外均高于T1处理, T2在15 d时达到最大值2.82%, 而T3在50 d时达到最大值2.98%。各处理SMBC/SMBN值均在4~7之间变化, 由此可判断绿肥还田后土壤中微生物群落以细菌为主; 同T1相比, 除110 d外T2和T3均表现出较高的SMBC/SMBN值。综上所述, 在盐碱地冬闲农田种植绿肥并还田可以显著提高棉田土壤碳氮和土壤微生物量碳氮含量, 改善土壤微生物群落组成和提高土壤微生物固碳效应, 为后茬作物生长提供养分。研究结果对盐碱地冬闲田的合理利用具有指导意义。
  • 图  1  禾本科绿肥还田后土壤有机碳(A)和土壤全氮(B)含量的变化

    T1: 冬闲农田-棉花; T2: 黑麦草-棉花; T3: 大麦-棉花。不同小写字母表示相同时间不同处理间差异显著(P<0.05), 不同大写字母表示相同处理不同时间之间差异显著(P<0.05)。 T1: winter fallow farmland-cotton; T2: ryegrass-cotton; T3: barley-cotton. Different lowercase letters indicate significant differences among treatments in the same time (P<0.05), and different capital letters indicate significant differences among different times of the same treatment (P<0.05).

    Figure  1.  Dynamics of soil organic carbon (A) and soil total nitrogen (B) contents after returning Graminaceous green manure to field

    图  2  禾本科绿肥还田后土壤微生物量碳(A)和微生物量氮(B)含量的变化

    T1: 冬闲农田-棉花; T2: 黑麦草-棉花; T3: 大麦-棉花。不同小写字母表示相同时间不同处理间差异显著(P<0.05), 不同大写字母表示相同处理不同时间之间差异显著(P<0.05)。 T1: winter fallow farmland-cotton; T2: ryegrass-cotton; T3: barley-cotton. Different lowercase letters indicate significant differences among treatments in the same time (P<0.05), and different capital letters indicate significant differences among different times of the same treatment (P<0.05).

    Figure  2.  Dynamics of soil microbial biomass carbon (A) and nitrogen (B) contents after returning Graminaceous green manure to field

    图  3  禾本科绿肥还田后土壤微生物熵的变化

    T1: 冬闲农田-棉花; T2: 黑麦草-棉花; T3: 大麦-棉花。不同小写字母表示相同时间不同处理间差异显著(P<0.05), 不同大写字母表示相同处理不同时间之间差异显著(P<0.05)。T1: winter fallow farmland-cotton; T2: ryegrass-cotton; T3: barley-cotton. Different lowercase letters indicate significant differences among treatments in the same time (P<0.05), and different capital letters indicate significant differences among different times of the same treatment (P<0.05).

    Figure  3.  Dynamics of soil microbial quotient after returning Graminaceous green manure to field

    图  4  绿肥还田对SMBC/SMBN值的影响

    T1: 冬闲农田-棉花; T2: 黑麦草-棉花; T3: 大麦-棉花。 T1: winter fallow farmland-cotton; T2: ryegrass-cotton; T3: barley-cotton.

    Figure  4.  Dynamics of ratios of soil microbial carbon to nitrogen after returning Graminaceous green manure to field

    表  1  土壤碳氮各指标间的相关性

    Table  1.   Correlation among soil carbon and nitrogen indexes

    SOCTNSMBCSMBNSMQSMBC/SMBN
    SOC1.000
    TN0.850**1.000
    SMBC0.1900.4721.000
    SMBN0.0930.4050.984**1.000
    SMQ−0.2330.0990.908**0.936**1.000
    SMBC/SMBN0.3850.5390.889**0.797**0.712**1.000
      SOC: 土壤有机碳; TN: 土壤全氮; SMBC: 土壤微生物量碳; SMBN: 土壤微生物量氮; SMQ: 土壤微生物熵。 SOC: soil organic carbon; TN: soil total nitrogen; SMBC: soil microbial biomass carbon; SMBN: soil microbial biomass nitrogen; SMQ: soil microbial quotient. **: P<0.01.
    下载: 导出CSV
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出版历程
  • 收稿日期:  2022-03-25
  • 录用日期:  2022-06-21
  • 修回日期:  2022-06-21
  • 网络出版日期:  2022-07-29
  • 刊出日期:  2023-03-10

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