盐耐受性训练对水灌下的夏季玉米多维根分布和根枝特征的影响
Suhan Peng1,2, Tao Ma1,2, Teng Ma1
1College of Agricultural Science and Engineering, Hohai University, Nanjing 211100, China.
Plants (Basel, Switzerland)
|September 28, 2023
概括
水灌方法S1-2-3优化了夏季玉米的根分布和生物质,最大限度地减少了产量损失. 这种方法推用于使用盐水资源的可持续农业.
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:
- 水灌给作物生产带来了挑战,特别是影响了根部发育和整体植物健康.
- 优化灌策略对于在需要使用盐水的缺水地区保持作物产量至关重要.
- 了解盐度,根结构和植物生长之间的复杂相互作用是开发弹性农业实践的关键.
研究的目的:
- 评估不同水灌度和时间对夏季玉米多维根分布的影响.
- 评估各种盐耐受训练模式对根芽特征,生物质积累和夏季玉米产量的影响.
- 为夏季玉米种植确定最佳的水灌策略,以平衡水资源利用与产量维持.
主要方法:
- 在受控条件下使用夏季玉米进行了微图片实验.
- 处理涉及不同度的盐水 (0.08-6.0 g·L-1),在关键的生长阶段 (六叶,十叶,) 应用.
- 与淡水控制 (CK) 相比,测量包括细根长度密度 (FRLD),根分布,叶面积,生物质和谷物产量.
主要成果:
- 低盐度处理 (S0) 与早期高盐度应激 (S0-2-3,S0-3-3) 限制了水平根部的扩散,减少了叶面积和生物量.
- 高盐度处理 (S2) 刺激了根生长,但导致根早衰低于30厘米,抑制了芽生长和降低产量.
- 中等盐度处理 (S1-2-3,S1-3-3) 显示FRLD分布有所改善,根部较弱;S1-2-3增强了叶子发育和生物量,最大限度地减少了产量减少.
结论:
- 对于夏季玉米,建议使用S1-2-3盐耐受性训练模式,包括在特定生长阶段适度水灌.
- 这一策略促进了平衡的根系架构,并增强了生物质的积累,使得与其他测试模式相比,产量损失最小化.
- 通过优化灌培训模式利用水资源,为可持续的夏季玉米生产提供了一种可行的方法.
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