干旱扰动下长期不同施肥潮土微生物群落稳定性研究
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S154.36

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国家自然科学基金面上项目(41977045)和国家重点研发计划重点专项课题(2022YFD1500304)资助


Soil Microbial Community Stability of Different Fertilization Strategies under Drought Disturbance
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National Natural Science Foundation of China (41977045) and National Key R&D Program (2022YFD1500304)

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    摘要:

    土壤微生物群落稳定性是土壤健康的重要组成部分和评价指标,揭示长期不同施肥的农田土壤微生物群落稳定性有助于指导田间施肥管理,保障农田生态系统的土壤健康和可持续发展。依托中国科学院封丘农业生态实验站长期定位试验,通过对三种不同施肥处理的潮土进行干旱扰动和复水回复的培养试验,从多种微生物群落响应指标(脱氢酶活性、细菌群落alpha多样性、关键物种丰度、微生物群落结构和分子生态网络拓扑属性)分别量化和比较了不同施肥处理的微生物群落稳定性(抵抗力和回复力)。结果表明,与不施肥处理(CK)和平衡施用化肥处理(NPK)相比,有机无机肥配施处理(OM)能够显著增加微生物群落稳定性,表现在OM的微生物群落响应指标在干旱-复水过程中的变化最小,抵抗力与回复力均优于CK和NPK。复水后不同施肥处理的细菌群落alpha多样性、关键物种丰度和网络拓扑参数能够回复到初始水平,而群落结构和脱氢酶活性不能完全回复,说明细菌群落alpha多样性的回复快于群落结构和功能。表明有机无机肥配施能显著提高微生物群落稳定性,是保障农田生态系统土壤健康和可持续发展的优良管理措施。

    Abstract:

    【Objective】Revealing soil microbial community stability of different long-term fertilization strategies is helpful to guide field fertilization management and ensure soil health and sustainable development of agroecosystems. 【Method】Based on the long-term stationary field experiment on nutrient balance in the Fengqiu National Agro-ecological Experimental Station of the Chinese Academy of Sciences, the experiments of drought disturbance and rewet recovery were carried out on three different fertilization strategies of Fluvo-aquic soils. The microbial community stability (resistance and recovery) was quantified and compared in terms of dehydrogenase activity, bacterial alpha diversity, key taxa, community structure and molecular ecological network. 【Result】Compared with no fertilization (CK) and mineral NPK fertilizers (NPK), organic manure plus mineral NPK fertilizers (OM) significantly increased the resistance and recovery of the microbial community. After rewet treatment, soil alpha diversity recovered faster than community function and structure. Soil alpha diversity, the abundance of key taxa and network topology parameters recovered to the initial level, while dehydrogenase activity and community structure did not recover completely. 【Conclusion】This study quantified and compared the microbial community stability of three different fertilization strategies from a variety of microbial community response indexes. The results showed that the application of organic manure plus mineral NPK fertilizers could significantly improve the stability of the microbial community, which is a good fertilization management strategy to ensure the soil health and sustainable development of the farmland ecosystem.

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张周,陈瑞蕊,王晓婷,俞冰倩,林先贵,冯有智.干旱扰动下长期不同施肥潮土微生物群落稳定性研究[J].土壤学报,2024,61(1):211-222. DOI:10.11766/trxb202206210261 ZHANG Zhou, CHEN Ruirui, WANG Xiaoting, YU Bingqian, LIN Xiangui, FENG Youzhi. Soil Microbial Community Stability of Different Fertilization Strategies under Drought Disturbance[J]. Acta Pedologica Sinica,2024,61(1):211-222.

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  • 收稿日期:2022-06-21
  • 最后修改日期:2022-11-14
  • 录用日期:2023-01-09
  • 在线发布日期: 2023-01-31
  • 出版日期: 2024-01-15