矿物和有机肥对N动态的影响在侵蚀引起的地表土壤稀释时
Isabel Zentgraf1,2, Mathias Hoffmann1, Jürgen Augustin1
1Leibniz Center for Agricultural Landscape Research (ZALF) e.V., Group of Isotope Biogeochemistry and Gas Fluxes, Eberswalder Str. 84, 15374, Müncheberg, Germany.
Heliyon
|August 15, 2024
概括
土壤侵蚀导致土壤侵蚀.
科学领域:
- 农业科学 农业科学
- 土壤科学 土壤科学
- 环境科学 环境科学
背景情况:
- 侵蚀引起的地表土壤稀释会影响耕地生物地质化学,土壤健康和作物生产率.
- 虽然已知对土壤碳 (C) 循环的影响,但对 (N) 循环和肥料动态的影响不太清楚.
研究的目的:
- 调查土壤类型,表土稀释和N肥料形成对N循环和作物系统中的肥料动态的影响.
- 使用甘油植物量化15N回收和分布在土壤部分.
主要方法:
- 使用三种被侵蚀的土壤类型 (Luvisol,被侵蚀的Luvisol,的Regosol) 进行了全因子实验.
- 表面土壤稀释是通过将20%的地下土壤混合到表面土壤中来实现的.
- 使用标记为15N的矿物化 (氨酸盐) 或有机 (沼气消化剂) 肥料,研究了肥的动态.
主要成果:
- 肥料N的动态和利用受土壤类型,表土稀释和肥料形式的影响.
- 与对照组相比,稀释表土处理显示出更高的15N回收率和更低的肥料N利用率.
- 有机肥处理导致植物吸收的N肥比矿物肥要低得多.
- 表面土壤稀释和有机肥料都增加了15N回收和土壤部分的N积累,土壤类型各有差异.
结论:
- 侵蚀导致的上层土壤稀释对植物土壤系统中的N循环和动态影响微不足道.
- 肥料形式和土壤类型是影响N循环和动态的关键因素.
- 了解这些因素对于准确的环境评估和可持续的农业实践至关重要.
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