在全球范围内通过限制玉米的潜在产量
B Ringeval1, J Demay1, J Helfenstein2
1ISPA, Bordeaux Sciences Agro, INRAE, Villenave d'Ornon, France.
Global change biology
|September 16, 2025
概括
全球 (P) 显著限制了玉米的生产,降低了高达92.7%的潜在产量. 植物调整可以减轻这种情况,但P缺乏仍然是全球作物产量的关键因素.
科学领域:
- 农业科学 农业科学
- 土壤科学 土壤科学
- 植物生理学 植物生理学
背景情况:
- (P) 是农作物产量的全球主要限制因素.
- 现有的模型很难分离P限制对收益差距的影响.
- 以前的方法忽略了关键的土壤P动态和植物适应机制.
研究的目的:
- 开发一种机制模型 (GPCROP) 来量化全球玉米生产的P限制.
- 模拟日常植物-土壤P相互作用,包括P池补充和植物调整.
- 评估P限制对全球玉米产量差距的贡献.
主要方法:
- 开发了模拟日常植物生长和土壤P动态的GPCROP模型.
- 纳入土壤P池补充,扩散和植物P应激反应 (根:射出比,射出P度).
- 假设所有其他增长因素都不限制孤立P效应.
主要成果:
- 由于P限制,全球玉米潜在产量将减少78.9% (包括工厂调整) 和92.7% (没有调整).
- 早期生长季节对于P限制至关重要,原因是根系发达不足.
- 工厂调整机制显著减轻了P限制,但并没有消除它.
结论:
- 可用的土壤 P 是全球玉米生产的一个重要的限制因素.
- 植物P应激反应至关重要,但不足以完全克服P限制.
- 准确评估P限制需要日常模拟和考虑土壤P动态,特别是在早期生长阶段.
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