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添加肥料改变了在强烈固定P的安道索上高地大米中不同P来源的利用
Eva Mundschenk1,2, Rainer Remus1, Jürgen Augustin1
1Group of Isotope Biogeochemistry and Gas Fluxes, Leibniz Centre for Agricultural Landscape Research (ZALF) E.V., Müncheberg, Germany.
概括
高地大米的基因型在 (P) 获取效率上有所不同,DJ123在获取本土土壤-P方面表现出色. 了解这些差异对于改善大米种植中的P使用至关重要.
科学领域:
- 农业科学 农业科学
- 植物生理学 植物生理学
- 土壤科学 土壤科学
背景情况:
- 高 (P) 效率,包括内部P利用效率 (PUE) 和P获取效率 (PAE),对于高地大米至关重要,特别是在P固定土壤如Andosols.
- 虽然研究了PAE的根性质,但与P效率相关的P来源 (本土土壤与肥料) 不太清楚.
研究的目的:
- 评估不同高地大米基因型在获得本土土壤-P和肥料-P方面的效率.
- 研究P受精水平如何影响本土土壤-P和肥料-P的吸收.
主要方法:
- 四种高地大米基因类型在低和高P受精水平下在Andosols种植.
- 肥料-P被标记为33P,以区分P吸收与原生土壤和肥料来源在出现后的9日和34天.
主要成果:
- 增加肥料供应增强了原生土壤-P跨基因型的吸收.
- 在低P条件下,DJ123表现出优异的PAE和本土土壤-P获取,而AB199表现出更高的PUE.
- 基因型DJ123比其他基因型获得的本土土壤-P每根单位要多得多,特别是在高P条件下.
结论:
- PAE的基因型变异与获得本土土壤-P的能力有关.
- 基因型DJ123在获得稀溶性本土土壤-P.的过程中非常有效.
- 需要对树根球过程进行进一步的研究,以了解本土土壤的增强PAE-P.
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