用低成本红外温度计对子进行作物水应激指数
Dalyn McCauley1, Sadie Keller2, Kody Transue1
1North Willamette Research and Extension Center, Oregon State University, Aurora, OR 97002, USA.
Sensors (Basel, Switzerland)
|December 17, 2024
概括
这项研究开发了一种实用的作物水应激指数 (CWSI) 模型,用于使用红外温度计进行子灌管理. 该模型有助于农民优化用水,提高作物产量,特别是在干旱期间.
科学领域:
- 农业科学 农业科学
- 遥感 遥感 遥感 遥感
- 植物生理学 植物生理学
背景情况:
- 由于热浪和干旱,气候变化增加了灌挑战.
- 先进的传感器技术为评估作物水状态提供了多种方法.
- 红外温度计是一种非破坏性的遥感技术,用于监测植物透气.
研究的目的:
- 为欧洲子 (Corylus avellana) 开发一个作物水应激指数 (CWSI) 模型.
- 使用植物水状况指标验证CWSI模型.
- 为子种植者提供一个实际的灌管理工具.
主要方法:
- 应用红外温度计来监测子的透气.
- 使用低成本,开源的红外温度计和数据记录器开发了一个CWSI模型.
- 通过对干水潜力和气体交换测量验证了CWSI模型.
主要成果:
- 经验证的CWSI模型显示,当干水潜力低于-6bar时,植物应激低 (CWSI<0.2).
- 在非压力条件下,叶子导电率从0.1到0.4mol m2 s-1不等.
- 从7月中旬开始,未受灌的子表现出压力 (CWSI>0.2),而灌的植物则保持不受压力.
结论:
- 开发的CWSI模型提供了一种有效的方法来评估子水的状态.
- 农民可以使用叶子导电率 (>0.2 mol m2 s-1) 或水电位 (>-6 bar) 值来做灌决策.
- 低成本的传感器技术可以显著提高农业监测和豆生产灌效率.
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