长期肥料实践对树叶球土壤氨氧化剂社区结构的长期肥料实践的影响在双耕田下
Haiming Tang1, Li Wen2, Lihong Shi2
1Hunan Soil and Fertilizer Institute, Changsha, 410125, China. tanghaiming66@163.com.
Scientific reports
|January 5, 2025
概括
长期使用大米和有机肥料可以通过促进氧化氨的古生物和细菌群体在双耕田中增强土壤循环,从而改善土壤循环. 这改善了土壤的有机碳和总含量.
科学领域:
- 农业土壤科学 土壤科学
- 环境微生物学 环境微生物学
- 生物地质化学生物地质化学
背景情况:
- 氨氧化对于土壤循环至关重要,受肥料类型的影响.
- 了解氨氧化古生物 (AOA) 和细菌 (AOB) 对大米田长期施肥的反应至关重要.
- 之前的研究还没有完全阐明这些影响在中国南部的双作物米系统.
研究的目的:
- 研究不同肥料管理对土壤氨氧化剂社区的长期 (37年) 影响.
- 分析AOA和AOB对潜在化活动 (PNA) 和社区结构的影响.
- 为了确定土壤特性和氨氧化剂社区在各种化肥方案下之间的关系.
主要方法:
- 使用四种处理方法进行实地实验:控制 (CK),无机肥 (MF),米 + 无机肥 (RF),有机 + 无机肥 (OM).
- 根球土壤特性分析,包括有机碳 (SOC),总和氨 (NH4+-N).
- 评估潜在的化活动 (PNA),潜在的化率 (PNR),以及AOA和AOB社区的丰富性/多样性.
主要成果:
- 射频和OM处理显著增加了土壤有机碳,总和.
- MF治疗增加了PNA,PNR和AOB的丰度,而RF和OM治疗增加了AOA的丰度.
- 与CK相比,RF和OM治疗的AOA和AOB多样性指数在RF和OM治疗中得到了增强.
- 在整个治疗过程中,AOA和AOB的社区成分主要由蛋白质细菌,活性细菌和酸性细菌占据主导地位.
- 在AOA丰富度和SOC,总N和NH4+-N之间发现了正相关性.
- 在土壤pH和AOA丰度,PNA和PNR之间观察到负相关性.
结论:
- 长期使用大米草和有机便有利于根球氨氧化剂的社区结构.
- 这些有机修订改善了土壤的含量,并支持在双耕系统中有益的微生物群落.
- 肥料管理策略显著影响土壤循环和农业土壤微生物生态.
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