植物气偏好 镜子 地下气循环 在自然生态系统
Ahmed S Elrys1,2, Lei Meng1,3, Yves Uwiragiye4
1School of Tropical Agriculture and Forestry, Hainan University, Haikou, China.
Global change biology
|October 15, 2025
概括
植物 (N) 获取策略是由土壤N循环和环境条件驱动的,而不仅仅是植物特征. 在森林和湿地中更受欢迎,而酸盐在草原中占主导地位,化能力作为关键调节剂.
科学领域:
- 生态生态学 生态生态学
- 生物地质化学生物地质化学
- 植物科学 植物科学
背景情况:
- 植物 (N) 获取对生态系统生产率至关重要,但预测植物N战略仍然具有挑战性.
- 了解植物N偏好,土壤微生物N循环和环境因素之间的相互作用至关重要.
研究的目的:
- 开发一个基于过程的框架,将植物N偏好与土壤N循环和环境条件联系起来.
- 分析植物吸收N的全球模式 (有机-N,-N,-N) 以及它们与土壤N转换的关系.
主要方法:
- 从66个N标签研究 (336个观察) 收集了关于植物N吸收的数据.
- 综合2030年对270项研究中的土壤总转换的观测,以建模全球循环.
- 分析了化能力,土壤pH,C:N比率和气候对植物N偏好的影响.
主要成果:
- -N是森林 (49%) 和湿地 (55%) 中的主要源,而酸-N在草原 (41%) 中占主导地位.
- 化能力受土壤pH和C:N比率的影响,显著调节植物对-N和酸盐-N的偏好.
- 在土壤N转换 (GNM,DNRA) 中气候驱动的转变介于植物N偏好,在降水/温度增加的情况下有利于.
结论:
- 植物N采购是一个由土壤N循环和环境条件调节的动态过程,而不是仅由植物驱动.
- 该研究为预测植物N战略提供了一个框架,通过将植物吸收数据与土壤N转化率整合起来.
- 需要进一步的研究,以纳入诸如菌根结合和植物功能特征等因素,以充分解释植物有机-N偏好.
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