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改善Cucurbita moschata的ETA估计使用基于遥感的FAO-56作物系数在葡萄牙利斯山谷,葡萄牙

Susana Ferreira¹, Juan Manuel Sánchez¹, José Manuel Gonçalves²

¹Instituto de Desarrollo Regional, UCLM Universidad de Castilla-La Mancha, 02071 Albacete, Spain.

Plants (Basel, Switzerland)

|November 13, 2025

概括

葡萄牙的高效水资源管理

科学领域:

农业科学农业科学
遥感遥感遥感遥感
土壤科学土壤科学

背景情况:

缺水需要有效的农业管理,特别是在像葡萄牙利斯山谷这样的地区.
优化作物水的状态和蒸发转化对于农业生产率至关重要.
在地中海条件下研究了南瓜 (Cucurbita moschata) 的用水动态.

研究的目的:

用现场和遥感数据评估南瓜作物水的状态和蒸发.
评估土壤水分含量 (SMC),电导率 (EC) 和Sentinel-2植被指数在水资源管理中的整合.
验证一个遥感辅助的FAO-56方法,用于估计实际蒸发转化率 (ETa).

主要方法:

在多个土壤深度使用TDR传感器实地测量SMC和EC.
获取和处理Sentinel-2图像以获得植被指数 (NDVI,SAVI,EVI,GCI).
使用植被指数重新计算ETa,以反映实际作物条件,取代标准FAO-56 Kc值.

主要成果:

在上层土壤层中,SMC和EC之间存在强烈的相关性,这表明EC对于近地表湿度监测的实用性.
在GreenSeeker®和来自Sentinel-2的NDVI之间观察到可比的时间模式.
使用RS辅助植被指数的ETA估计显示与FAO-56方法一致.
估计的水生产率 (WP) 为8.32kgm−3和水利用效率 (WUE) 为0.64kgm−3.

结论:

将高分辨率遥感与土壤湿度监测相结合,可以提高精确的灌策略.
经过验证的RS辅助方法在数据有限的地中海环境中对水资源管理具有实用性.
该研究强调了在地中海小农灌下种植南瓜的高用水效率,促进了节水.

关键词:

农作物生产力的提高蒸发透气是指蒸发透气.灌灌方式土壤水分土壤水分可持续农业可持续农业植被指数植被指数水的生产力水的生产力.

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