一个可持续的施肥策略,以提高玉米的产量和盐土中的光合作用能力
Hui Zhou1,2, Jiawei Guo3, Yongqiang Wang3
1Yinshanbeilu Grassland Eco-Hydrology National Observation and Research Station, China Institute of Water Resources and Hydropower Research, Beijing, China.
Frontiers in plant science
|August 27, 2025
概括
有机和无机 (OIN) 增加了盐土中的玉米产量. 最佳的形式取决于盐度,U1O1最适合轻度盐度,O1适合中度盐度.
科学领域:
- 农业科学
- 土壤科学
- 植物生理学
背景情况:
- 土壤盐化严重限制了干旱/半干旱地区的作物生产.
- 有机和无机 (OIN) 的联合应用是提高盐土作物生产率的一个有希望的策略.
- 需要进一步阐明OIN提高产量的确切机制,特别是关于光合作用和抗氧化反应.
研究的目的:
- 研究有机和无机 (OIN) 在不同土壤盐度下对玉米生长,光合作用和抗氧化反应的影响.
- 确定最佳的管理策略,以最大限度地提高在轻度和中度盐分的土壤中的玉米产量.
- 通过OIN应用来阐明盐土产量改善的基本机制.
主要方法:
- 在内蒙古轻度 (S1) 和中度 (S2) 盐分的土壤上进行了为期两年的实验 (2018-2020年).
- 应用了六种处理:没有 (CK),只有无机 (U1),以及四种OIN组合 (U3O1,U1O1,U1O3,O1),其中有机取代了25-100%的无机.
- 测量包括玉米生长参数,光合作用特性,抗氧化酶活性 (SOD,CAT) 和产量.
主要成果:
- 在温和的性土壤 (S1) 中,OIN显著改善了叶面积指数,光合作用,超氧化物脱酶 (SOD) 活性和产量,U1O1处理显示出最高产量.
- 在中度性土壤 (S2) 中,OIN的应用增强了生长,光合作用和酶 (CAT) 活性,尽管整体生长和光合作用减少了,但O1处理产生了最高的产量.
- 结构方程建模显示,光合作用特征主要推动了S1的产量改善,而生长,光合作用和CAT活动的组合则对S2的产量增加负责.
结论:
- 有机和无机 (OIN) 有效地减轻了度压力对玉米的负面影响.
- 盐土的最佳管理策略取决于盐度:轻度盐度的U1O1和中度盐度的O1.
- 这些发现为优化的应用提供了有价值的见解, 以提高受盐影响的农业环境中的玉米生产率.
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