全球模式和收益率和使用效率的控制在大米中
Shending Chen1, Ahmed S Elrys2, Chang Zhao3
1School of Geography, Nanjing Normal University, Nanjing 210023, China.
The Science of the total environment
|July 16, 2023
概括
全球大米产量和使用效率受到肥,气候和土壤的影响. 平均产量为6791公斤/公,N (AEN) 的农学效率为15.6公斤/公斤. 土壤特性和气候相互作用,影响大米生产.
科学领域:
- 农业科学 农业科学
- 农业学是一种农业学.
- 土壤科学 土壤科学
背景情况:
- 米产量和使用效率 (NUE) 对全球粮食安全至关重要.
- 气候因素和土壤特性显著影响大米生产,但它们的复杂相互作用仍未得到充分研究.
- 对这些因素的全面了解对于优化全球大米种植和NUE至关重要.
研究的目的:
- 对影响大米产量和使用效率 (NUE) 的气候因素和土壤特性进行全球系统分析.
- 确定影响全球大米产量和N (AEN) 的农学效率的关键驱动因素和相互作用.
- 探索气候区对大米产量和AEN及其各自驱动因素的影响.
主要方法:
- 综合分析了363篇发表文章中的2293个观察结果.
- 系统审查和统计分析包括的应用,气候变量 (温度,降水) 和土壤特性 (总N,可用的N,有机碳,散装密度,pH,CEC) 在内的因素.
- 研究了相关性和抛物线反应,以确定不同气候区的产量和AEN的关键驱动因素.
主要成果:
- 全球平均水产量为6791公斤/公,平均AEN为15.6公斤/公斤.
- 米产量与度,N率,土壤N和土壤有机碳正相关;与年平均温度 (MAT) 和散装密度负相关.
- N应用率是AEN的主要抑制剂,而土壤阳离子交换能力 (CEC) 是主要的刺激剂. MAT和降水通过CEC影响了AEN.
- 温带地区低MAT的产量更高,而热带地区的AEN更高.
结论:
- 的应用率,土壤总N和MAT是全球大米产量的关键驱动因素.
- 土壤特性,特别是CEC,在调节AEN方面发挥着至关重要的作用,并与MAT和降水等气候因素相互作用.
- 未来的气候变化,特别是温度变化,可能会通过与土壤特性相互作用,显著影响大米生产.
- 优化AEN需要考虑CEC在米种植中的核心影响.
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