原生草原土壤微生物组对春秋之间大量放牧的不同反应
Newton Z Lupwayi1, Xiying Hao1, Monika A Gorzelak1
1Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, 5403 - 1st Avenue South, Lethbridge, Alberta, T1J 4B1, Canada.
Microbiology (Reading, England)
|November 26, 2024
概括
重度放牧影响草原土壤微生物和酶,影响因季节而异. 建议采用轻度放牧,以保持土壤健康和微生物活动.
科学领域:
- 土壤科学 土壤科学
- 微生物学 微生物学
- 生态生态学 生态生态学
背景情况:
- 草原占地球土地的40%,对于牧场来说至关重要.
- 长期放牧对土壤微生物群的影响还没有得到充分研究.
- 了解这些影响对于可持续的土地管理至关重要.
研究的目的:
- 研究长期放牧对土壤特性和微生物群落的影响.
- 为了比较没有,轻度和重度放牧 (0,1.2,2.4 AUM/ha) 的影响.
- 评估牧场影响的季节性差异 (春季与秋季).
主要方法:
- 利用一个68年的牧场实验.
- 测量了土壤 permanganate 氧化碳 (POXC) 和微生物生物质碳 (MBC).
- 分析了 prokaryotic 社区的组成,多样性和土壤酶活动.
主要成果:
- 沉重的牧场改变了土壤的碳含量和 prokaryotic 社区结构,特别是在春天.
- 观察到季节性差异:秋季放牧减少了POXC,MBC和微生物丰富度.
- 参与P和S循环的酶活动随着库存率的增加而下降;C和N循环酶在秋季受到影响.
结论:
- 轻度放牧减少了对草原土壤微生物群和活动的负面影响.
- 放牧季节是影响土壤微生物反应的关键因素.
- 可持续的牧场管理需要考虑养殖率和时间.
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