肥对土壤细菌群落,循环基因和北中国平原不同土壤类型的小麦产量的影响
Geng Ma1, Xiaoyan Zhang2, Xiaojie Han2
1College of Agronomy, Henan Agricultural University, Zhengzhou 450002, China.
Microorganisms
|October 29, 2025
概括
肥对土壤细菌的影响和小麦产量在不同土壤类型中不同. 最佳的N应用取决于土壤特性,影响微生物群落,最终影响作物生产率.
科学领域:
- 农业科学 农业科学
- 土壤科学 土壤科学
- 微生物学 微生物学
背景情况:
- (N) 肥料对作物产量至关重要,但其对土壤细菌群落及其对不同土壤类型的产量的影响尚未完全理解.
- 了解这些土壤特异性的微生物反应是优化N管理以实现可持续农业的关键.
研究的目的:
- 研究不同肥率对细菌群落,土壤特性,N循环基因和三种不同土壤类型的小麦产量的影响.
- 为了阐明土壤特性,微生物群落,N循环基因和不同N施肥方案下的作物产量之间的关系.
主要方法:
- 在流水性,沙性和石灰混凝土的黑土壤上进行了三次5年固定现场实验,使用四个N受精水平 (0,180,240,300千克/ha-1).
- 分析了土壤的物理化学特性,细菌群体结构 (多样性和组成),以及N循环功能基因.
- 利用部分最小平方路径建模 (PLS-PM) 来确定N应用,土壤特性,微生物群落和小麦产量之间的因果关系.
主要成果:
- 2处理 (240公斤-1) 最大化了小麦产量,尽管沙土的产量始终低于流水和石灰混凝土黑土.
- 肥降低了土壤的pH值 (特别是在沙土),增加了NO3−-N含量. 细菌α-多样性下降与N应用在沙土,但不是其他人.
- NO3−-N是流水和石灰混凝土黑土中细菌β多样性的主要驱动因素. N循环基因与土壤特性有显著的相关性.
结论:
- 化肥显著改变土壤的物理化学特性和细菌群落以土壤特定的方式,影响小麦产量.
- 土壤特性调解了肥对细菌群落的影响,这反过来又影响了小麦产量,解释了大量的产量变化.
- 优化管理需要考虑土壤特定的微生物反应,以提高农业的可持续性.
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