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首页> 外文期刊>Plant and Soil >Nitrogen-inputs regulate microbial functional and genetic resistance and resilience to drying-rewetting cycles, with implications for crop yields
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Nitrogen-inputs regulate microbial functional and genetic resistance and resilience to drying-rewetting cycles, with implications for crop yields

机译：氮气输入调节微生物功能和遗传性耐药性，并弹性对干擦拭循环，具有作物产量的影响

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摘要

Background and aims The increasing input of anthropogenically-derived nitrogen (N) to ecosystems raises a crucial question: how do N inputs modify the soil microbial stability, and thus affect crop productivity? Methods Soils from an 8-year rice-wheat rotation experiment with increasing N-input rates were subjected to drying-rewetting (DW) cycles for investigating the resistance and resilience of soil functions, in terms of abundances of genes (potential functions) and activities of enzymes (quantifiable functions), to this stress, and particularly the contribution of resistance and resilience on crop production was evaluated. Results Although the DW cycles had a stronger effect compared to N fertilization level, the N input was also important in explaining the variation in the resistance and resilience of functional genes and the activities of enzymes involved in C, N and P cycling. Crop yields benefited from both of high resistance and high resilience of soil microbial functions, though the resistance and resilience of soil enzyme activities exhibited a stronger contribution to crop yields compared to the functional genes and the overall contribution strength was conditioned by N input levels. Conclusions In addition to the well-known direct contribution of N fertilization on crop yields, N input plays an indirect role on crop production via conditioning the resistance and resilience of soil functions in response to repeated DW cycles.
机译：背景技术并旨在增加人为衍生的氮气（n）对生态系统的关键问题：n个输入如何改变土壤微生物稳定性，从而影响作物生产率？方法对8年的稻米旋转实验的土壤随着N型输入速率的增加，进行干预（DW）循环，用于研究土壤功能的抗性和韧性，就基因（潜在函数）和活动而言评估了酶（可量化的函数），特别是对这种压力的影响，特别是对作物生产的抗性和韧性的贡献。结果虽然DW循环与N施肥水平相比具有较强的效果，但是N个输入在解释功能基因的抗性和恢复性的变化以及C，N和P循环中涉及的酶活性的变化也很重要。作物产量受益于土壤微生物函数的高抗性和高弹性，尽管与功能基因相比，土壤酶活性的抗性和韧性表现出对作物产量的更强贡献，并且通过N个输入水平调节整体贡献强度。结论除了众所周知的N施肥对作物产量的直接贡献之外，N个输入通过调节土壤函数的阻力和恢复响应于重复的DW循环而在作物生产上发挥着间接作用。

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  • 来源
    《Plant and Soil》 |2019年第2期|共15页
  • 作者

    Luo Gongwen; Ling Ning; Xue Chao; Dippold Michaela A.; Firbank Les G.; Guo Shiwei; Kuzyakov Yakov; Shen Qirong;

  • 作者单位

    Nanjing Agr Univ Jiangsu Collaborat Innovat Ctr Solid Organ Waste Jiangsu Prov Key Lab Solid Organ Waste Utilizat Nanjing 210095 Jiangsu Peoples R China;

    Nanjing Agr Univ Jiangsu Collaborat Innovat Ctr Solid Organ Waste Jiangsu Prov Key Lab Solid Organ Waste Utilizat Nanjing 210095 Jiangsu Peoples R China;

    Nanjing Agr Univ Jiangsu Collaborat Innovat Ctr Solid Organ Waste Jiangsu Prov Key Lab Solid Organ Waste Utilizat Nanjing 210095 Jiangsu Peoples R China;

    Univ Gottingen Dept Agr Soil Sci Dept Soil Sci Temperate Ecosyst Gottingen Germany;

    Univ Leeds Fac Biol Sci Leeds W Yorkshire England;

    Nanjing Agr Univ Jiangsu Collaborat Innovat Ctr Solid Organ Waste Jiangsu Prov Key Lab Solid Organ Waste Utilizat Nanjing 210095 Jiangsu Peoples R China;

    Univ Gottingen Dept Agr Soil Sci Dept Soil Sci Temperate Ecosyst Gottingen Germany;

    Nanjing Agr Univ Jiangsu Collaborat Innovat Ctr Solid Organ Waste Jiangsu Prov Key Lab Solid Organ Waste Utilizat Nanjing 210095 Jiangsu Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 土壤学;
  • 关键词

    Climate change; Soil microbial function; Resistance and resilience; Enzyme patterns; Rice-wheat rotation;

    机译：气候变化;土壤微生物功能;抗性和弹性;酶图案;米小麦旋转;

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