长期放牧和管理影响了草地牧场的甲排放潜力和土壤微生物群体
Maura Purcell1, Jesse DuPont2, Anil Somenahally3
1Department of Biology, University of Texas at Tyler, Tyler, Texas 75799, United States.
Environment & health (Washington, D.C.)
|January 22, 2025
概括
可持续的畜牧管理是关键. 最佳的牧场和使用可以减少甲排放,并增加牧场的土壤碳,有利于农业的可持续性.
科学领域:
- 农业科学 农业科学
- 环境科学 环境科学
- 土壤科学 土壤科学
背景情况:
- 可持续的畜牧农业面临着平衡生产,温室气体 (GHG) 减少和利用的挑战.
- 牧场生态系统的牛放牧,养殖率和施肥对牧场生态系统的长期影响对于环境管理至关重要.
研究的目的:
- 研究连续放牧,放牧率和肥料对甲 (CH4) 排放,土壤微生物群落和土壤有机碳 (SOC) 库存的长期影响.
- 确定减轻温室气体排放和提高百慕大草原草地SOC的管理策略.
主要方法:
- 长期研究 (超过50年) 连续放牧的牛与高与低的养殖率和两个施肥方案 (N-肥料与三叶草).
- 收集季节性土壤核心 (0-60厘米) 和实验室微观宇宙化研究,以测量CH4排放.
- 对土壤微生物群落的分析,包括甲素和甲类植物的丰富性,以及SOC库存.
主要成果:
- 在表面土壤 (0-5厘米) 中观察到出乎意料的高CH4排放量,特别是在高养率和三叶草牧场中.
- 库存较少,N-受精的牧场显示了可以忽略不计的CH4排放量,最小的甲素丰度和最高的SOC库存.
- 动物便显著增加了CH4排放;微生物群落对N-fertilization的反应比养殖率更大.
结论:
- 战略管理,包括最佳的牧场和肥,可以有效地减轻牧场的CH4排放.
- 低库存率与N-受精的一年一度的麦草相结合,促进了更高的SOC库存和更低的CH4排放.
- 了解微生物对管理实践的反应对于开发可持续畜牧农业至关重要.
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