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首页> 外文期刊>The Science of the Total Environment >Contrasting impacts of long-term application of manure and crop straw on residual nitrate-N along the soil profile in the North China Plain
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Contrasting impacts of long-term application of manure and crop straw on residual nitrate-N along the soil profile in the North China Plain

机译：肥料和作物秸秆长期应用对北方土壤剖面肥料和作物秸秆的长期应用对剩余硝酸盐 - n的影响

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摘要

The effects of long-term animal manure application and crop straw incorporation on the migration of carbon (C) and nitrogen (N) deep into the soil profile and the associated N leaching risk in particular have not been thoroughly elucidated to date. Soil profile samples were collected from depths of up to 200 cm from the following four treatments in a 27-year field experiment on the North China Plain: N + phosphorus (P) + potassium (K) fertilizers (NPK), NPK + 22.5 t ha~(-1) swine manure (NPKM), NPK + 33.7 t ha~(-1) swine manure (NPKM+) and NPK + straw incorporation (NPKS). The results revealed that long-term manure application and straw incorporation significantly enhanced the soil organic C (SOC) and total N (TN) contents in the upper 20 cm and that this effect was weaker in the deeper soil layers (P ＜ 0.05). Residual nitrate-N (NO_3~--N) contents at 0 to 40 cm and 120 to 200 cm in the NPKM and NPKM+ were 4-16 and 2-9 times higher than those in the NPK and NPKS, respectively. These results indicated a greater potential for N leaching from manure addition and a higher propensity for NO_3~--N leaching out of the 40-100 cm soil layer. Pearson relationship analysis demonstrated that NO_3~--N content was clearly affected by SOC and dissolved organic N (DON) contents along the soil profile (20-200 cm), implying that the higher residual NO_3~--N contents in the deeper soil from manure addition were partially attributable to the mineralization and nitrification of the downward SOC and DON. Interestingly, a low level of residual NO_3~--N combined with negative mineralization in the 120-200 cm soil layers of the NPKS treatment was observed, suggesting that straw incorporation promotes soil NO_3~--N retention. Thus, we concluded that long-term manure application is beneficial for soil NO_3~--N content retention, whereas long-term straw incorporation benefits NO_3~--N retention.
机译：长期动物粪便应用和作物秸秆掺入碳（c）和氮气（n）深入土壤剖面的迁移和相关的n浸出风险的影响，迄今尚未彻底阐明。在华北平原的27年的田间实验中，从以下四个治疗中从高达200厘米的深度收集土壤剖面样品：N +磷（P）+钾（K）肥料（NPK），NPK + 22.5 T. HA〜（-1）猪粪（NPKM），NPK + 33.7 T HA〜（-1）猪粪（NPKM +）和NPK +秸秆掺入（NPKS）。结果表明，长期粪便施用和秸秆掺入显着增强了上20厘米的土壤有机C（SOC）和总N（TN）含量，并且这种效果在更深的土壤层中较弱（P <0.05）。在NPKM和NPKM +中，在0至40cm的残留硝酸盐-N（NO_3〜NN）含量分别为4-16〜16〜16倍，2-9倍，分别高出2-9倍。这些结果表明，N从粪便添加的N浸出的可能性更大，并且对于40-100cm的土壤层的NO_3〜 - NN浸出的更高倾向。 Pearson关系分析表明，NO_3〜--N含量明显受到土壤曲线（20-200cm）（20-200cm）的SoC和溶解的有机N（Don）内容物的影响，这意味着更深的土壤中的较高残留的NO_3〜--N含量从粪肥添加到矿化和向下SOC和DON的矿化和硝化的部分归因于矿化和硝化。有趣的是，观察到NPKs治疗120-200cm土层中的低水平残留NO_3〜-N与负矿化相结合，表明秸秆掺入促进土壤NO_3〜 - 持续保留。因此，我们得出结论，长期粪便申请对土壤NO_3〜-N含量保持有益，而长期秸秆融合益处NO_3〜 - 保留。

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  • 来源
    《The Science of the Total Environment》 |2019年第2期|2251-2259|共9页
  • 作者

    Xiapu Gai; Hongbin Liu; Jian Liu; Limei Zhai; Hongyuan Wang; Bo Yang; Tianzhi Ren; Shuxia Wu; Qiuliang Lei;

  • 作者单位

    Key Laboratory of Nonpoint Source Pollution Control Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing China;

    Key Laboratory of Nonpoint Source Pollution Control Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing China;

    School of Environment and Sustainability and Global Institute for Water Security University of Saskatchewan Saskatoon SK S7N 3H5 Canada;

    Key Laboratory of Nonpoint Source Pollution Control Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing China;

    Key Laboratory of Nonpoint Source Pollution Control Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing China;

    Key Laboratory of Nonpoint Source Pollution Control Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing China;

    Department of Science and Technique Management Chinese Academy of Agricultural Sciences Beijing China;

    Key Laboratory of Nonpoint Source Pollution Control Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing China;

    Key Laboratory of Nonpoint Source Pollution Control Ministry of Agriculture/Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences Beijing China;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    Manure application; Straw incorporation; Residual nitrate-N; Long-term experiment; Nonpoint source pollution;

    机译：粪便申请;秸秆公司;残余硝酸盐-N;长期实验;非点源污染;

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