结合热成像和土壤含水量传感器来评估梨树中的树水状况
Victor Blanco1,2, Noah Willsea1,2, Thiago Campbell1,2
1Tree Fruit Research and Extension Center, Washington State University, Wenatchee, WA, United States.
Frontiers in plant science
|June 22, 2023
概括
热量指标,如树冠空气温度差异和作物水压力指数,比土壤含水量更好地检测梨树的水压力. 将这些热量指数与土壤含水量相结合,可以改善灌管理.
科学领域:
- 园艺园艺 园艺园艺
- 植物生理学 植物生理学
- 农业工程 农业工程
背景情况:
- 量度土壤含水量是水果树灌的标准.
- 将树木水状况与土壤水分相结合,可以提高灌时间安排和水应激检测.
- 基于热量的指标为传统的树木水状况测量提供了具有成本效益的替代方案.
研究的目的:
- 评估用于梨树灌管理的基于热量的指标 (树冠温度,树冠空气温度差异,作物水应激指数).
- 为了比较热量指标与土壤水含量的有效性,检测水应激.
- 为改进灌计划提出一个综合方法.
主要方法:
- 测量了"D'Anjou"和"Bartlett"梨树的土壤和树木水的状况,在两个季节的监管赤字灌下.
- 评估了树冠温度 (Tc),树冠空气温度差 (Tc-Ta) 和作物水应力指数 (CWSI).
- 将这些指标与中午的茎水潜力和口腔导电性进行比较.
主要成果:
- 缺口灌的树木表现出较低的茎水潜力和口腔导电性,但较高的Tc,Tc-Ta和CWSI.
- 与Tc相比,Tc-Ta和CWSI对环境条件的依赖性较小,用于评估水资源短缺.
- 与干水潜力的关系按照以下顺序进行:CWSI > Tc-Ta > 土壤含水量 = Tc.
结论:
- 树冠空气温度差和CWSI是梨树水状况的强有力的指标,仅表现出土壤含水量.
- 建议使用多重回归分析,将土壤水含量和热量指数结合起来,以克服单个指标的限制.
- 这些发现支持使用热成像来改善梨树的灌时间表.
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