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高丹草“土-草-畜”界面的氮素运移规律

李源 赵海明 游永亮 武瑞鑫 刘贵波 杨志敏 祖晓伟

李源, 赵海明, 游永亮, 武瑞鑫, 刘贵波, 杨志敏, 祖晓伟. 高丹草“土-草-畜”界面的氮素运移规律[J]. 中国生态农业学报(中英文), 2022, 30(8): 1249−1257 doi: 10.12357/cjea.20210898
引用本文: 李源, 赵海明, 游永亮, 武瑞鑫, 刘贵波, 杨志敏, 祖晓伟. 高丹草“土-草-畜”界面的氮素运移规律[J]. 中国生态农业学报(中英文), 2022, 30(8): 1249−1257 doi: 10.12357/cjea.20210898
LI Y, ZHAO H M, YOU Y L, WU R X, LIU G B, YANG Z M, ZU X W. Nitrogen migration along the soil-forage-livestock interface for Sorghum bicolor×S. sudanense[J]. Chinese Journal of Eco-Agriculture, 2022, 30(8): 1249−1257 doi: 10.12357/cjea.20210898
Citation: LI Y, ZHAO H M, YOU Y L, WU R X, LIU G B, YANG Z M, ZU X W. Nitrogen migration along the soil-forage-livestock interface for Sorghum bicolor×S. sudanense[J]. Chinese Journal of Eco-Agriculture, 2022, 30(8): 1249−1257 doi: 10.12357/cjea.20210898

高丹草“土-草-畜”界面的氮素运移规律

doi: 10.12357/cjea.20210898
基金项目: 国家牧草产业技术体系(CARS-34)和河北省农林科学院青年创新团队建设专项经费(F17R01)资助
详细信息
    作者简介:

    李源, 主要从事高丹草育种及栽培技术研究。E-mail: gsly868@163.com

    通讯作者:

    刘贵波, 主要从事牧草育种及栽培技术研究。E-mail: lgb2884@126.com

  • 中图分类号: S812-05; S124+.2; S544

Nitrogen migration along the soil-forage-livestock interface for Sorghum bicolor×S. sudanense

Funds: The study was supported by the Earmarked Fund for the National Forage Industry Technology System of China (CARS-34) and the Youth Innovation Team of Hebei Academy of Agriculture and Forestry Sciences (F17R01).
More Information
  • 摘要: 探讨施入氮在高丹草“土-草-畜”界面的运移规律, 为合理施肥提供理论依据。试验采用15N同位素标记法, 设置0 kg∙hm−2 (CK)、90 kg∙hm−2 (N90)、180 kg∙hm−2 (N180)、270 kg∙hm−2 (N270)、360 kg∙hm−2 (N360)等15N施肥处理, 分析了不同施肥处理下高丹草主要农艺性状的变化以及“土-草”界面施入氮的植物利用率、土壤残留率、损失率、茎叶分配率, “草-畜”界面肉羊、奶牛对施入氮的消化率、利用率、残留率的变化。结果表明, N180处理下的总干草产量显著高于CK和N90处理(P<0.05), 与N270和N360处理无显著差异; “土-草”界面, N180处理下施入氮的植物利用率、土壤残留率最高, 损失率最低, 与N360处理差异显著(P<0.05), 与其他处理无显著差异; “草-畜”界面, N180处理下肉羊对施入氮的利用率显著高于N360处理(P<0.05), 与其他处理无显著差异, N180处理下奶牛对施入氮的利用率最高, 但与其他处理间无显著差异。施入氮在高丹草“土-草”界面的运移规律为: 土壤残留25.22%, 高丹草吸收23.95%, 损失50.83%; 高丹草茎、叶部位对施入氮的分配规律表现为: 叶(54.35%)>茎(45.65%)。15N标记高丹草被反刍动物消化后, 综合得出, 施入氮在高丹草“土-草-畜(肉羊)”界面施入氮的运移规律为: 土壤残留25.22%, 高丹草残留4.49%, 肉羊吸收19.46%, 损失50.83%; 在“土-草-畜(奶牛)”界面的运移规律为: 土壤残留25.22%, 高丹草残留5.78%, 奶牛吸收18.17%, 损失50.83%。研究结果揭示了氮素在高丹草“土-草-畜”界面的运移规律, 可为高丹草合理施肥及草畜转化研究提供理论依据。
  • 图  1  田间小区平面示意图(黑色部分为微区, $\Delta $表示施15N尿素; 白色部分为保护区, ◎表示施普通尿素)

    Figure  1.  Schematic diagram of field plot (black part was micro area,“$\Delta $”means application of 15N urea; white part was protected area, “◎”means application of common urea)

    图  2  不同15N施用量下高丹草“土-草”界面施入氮的植物利用率、土壤残留率和损失率

    相同图案不同小写字母表示不同处理间差异显著(P<0.05)。Different lowercase letters in the same pattern indicate significant differences among 15N application rates at P<0.05 level.

    Figure  2.  Plant utilization rate, soil residual rate and loss rate of 15N at the interface of soil-forage of Sorghum bicolor×S. sudanense under different 15N application rates

    图  3  不同15N施用量下15N在高丹草茎、叶的分配率

    不同小写字母表示不同处理间差异显著(P<0.05)。Different lowercase letters indicate significant differences among 15N application rates at P<0.05 level.

    Figure  3.  Distribution rates of 15N in the stem and leaf of Sorghum bicolor×S. sudanense under different 15N application rates

    图  4  不同15N施用量下“草-畜”界面15N的肉羊消化率、利用率和消化残留率

    不同小写字母表示不同处理间差异显著(P<0.05)。Different lowercase letters indicate significant differences among 15N application rates at P<0.05 level.

    Figure  4.  Sheep digestibility, utilization rate and residue rate of 15N at the interface of forage-livestock under different 15N application rates

    图  5  不同15N施用量下“草-畜”界面15N的奶牛消化率、利用率和消化残留率

    不同小写字母表示不同处理间差异显著(P<0.05)。Different lowercase letters indicate significant differences among 15N application rates at P<0.05 level.

    Figure  5.  Dairy cow digestibility, utilization rate and residue rate of 15N at the interface of forage-livestock under different 15N application rates

    表  1  不同15N施肥处理对高丹草不同茬次主要农艺性状的影响

    Table  1.   Effect of different 15N treatments on main agronomic characters of Sorghum bicolor×S. sudanense

    处理
    Treatment
    15N施用量
    15N application rate
    (kg∙hm−2)
    生长天数
    Growth days (d)
    株高
    Plant height (cm)
    茎叶比
    Ratio of stem/leaf
    干草产量
    Dry yield (g∙plot−1)
    总干草产量
    Total dry yield
    (g∙plot−1)
    第1茬
    1st cutting
    第2茬
    2nd cutting
    第1茬
    1st cutting
    第2茬
    2nd cutting
    第1茬
    1st cutting
    第2茬
    2nd cutting
    第1茬
    1st cutting
    第2茬
    2nd cutting
    CK06967252.3±4.1a163.7±4.1a2.01±0.23a1.69±0.06a1162.7±256.2b788.5±134.1a1951.2±244.5b
    N90906967249.6±13.6a161.0±4.3a1.80±0.25a1.73±0.07a1250.4±233.9b743.8±83.9a1994.1±308.5b
    N1801806967237.9±17.4a164.3±12.4a1.93±0.12a1.75±0.02a1673.3±127.5a901.0±330.9a2574.2±238.8a
    N2702706967242.7±6.6a169.2±12.1a1.97±0.20a1.73±0.27a1447.5±231.8ab967.7±193.1a2415.2±184.1ab
    N3603606967239.9±5.4a161.1±5.2a2.00±0.26a1.72±0.20a1379.0±198.5ab749.3±162.9a2128.3±204.4ab
      同列不同小写字母表示差异显著(P<0.05)。Different lowercase letters in a column indicate significant differences at P<0.05 level.
    下载: 导出CSV
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  • 收稿日期:  2021-12-18
  • 录用日期:  2022-03-24
  • 网络出版日期:  2022-03-30
  • 刊出日期:  2022-08-01

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