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Improving the estimation of soil water evaporation based on days after wetting
Journal of Agronomy and Crop Science ( IF 3.5 ) Pub Date : 2022-06-21 , DOI: 10.1111/jac.12614
Élvis da Silva Alves 1 , Lineu Neiva Rodrigues 1, 2 , Fernanda Laurinda Valadares Ferreira 1
Affiliation  

Soil evaporation constitutes a major pathway of water loss in agriculture. Understanding its dynamics in the face of drying and soil cover is fundamental to improve both simulation models and the sustainability of production systems. Thus, the objective of this study was to estimate soil evaporation as a function of drying and percentage of soil cover. Three experiments were carried out in three different periods. In each of the periods, in parallel and in an adjacent area, an experiment was carried out to evaluate the influence of weighing micro-lysimeter (ML) height on the estimation of direct soil evaporation. The experiments were installed with a completely randomized design. For the experiments that measured evaporation as a function of cover, the treatments consisted of six different percentages of cover of the internal area of the ML (0%, 10%, 25%, 50%, 75% and 100%), with four replicates, using artificial plants to cover the soil. The experiments that estimated evaporation as a function of ML height were conducted with eight repetitions and three different ML heights (100, 200 and 300 mm). It was observed that the accumulated evaporation up to 25 days after wetting was 52% and 53% lower in micro-lysimeters with 100 mm height, compared to those with 200 and 300 mm height, respectively, for all experiments. The new model developed to calculate soil evaporation as a function of the days after wetting and percentage of soil cover showed excellent performance (NSE > 0.95).

中文翻译:

改进基于润湿后天数的土壤水分蒸发估算

土壤蒸发是农业水分流失的主要途径。了解其在面临干燥和土壤覆盖时的动态对于改进模拟模型和生产系统的可持续性至关重要。因此,本研究的目的是估计土壤蒸发与干燥和土壤覆盖百分比的关系。在三个不同时期进行了三个实验。在每个时期,在平行和相邻区域,进行了一项实验,以评估称重微渗仪 (ML) 高度对直接土壤蒸发估计的影响。实验采用完全随机设计。对于测量蒸发作为覆盖函数的实验,处理包括 ML 内部区域的六个不同百分比的覆盖(0%,10%、25%、50%、75% 和 100%),重复四次,使用人造植物覆盖土壤。估计蒸发作为 ML 高度函数的实验进行了八次重复和三个不同的 ML 高度(100、200 和 300 毫米)。据观察,在所有实验中,与高度为 200 和 300 毫米的微型蒸渗仪相比,高度为 100 毫米的微蒸渗仪在润湿后长达 25 天的累积蒸发量分别低 52% 和 53%。开发用于计算土壤蒸发与润湿后天数和土壤覆盖百分比的关系的新模型显示出出色的性能(NSE > 0.95)。估计蒸发作为 ML 高度函数的实验进行了八次重复和三个不同的 ML 高度(100、200 和 300 毫米)。据观察,在所有实验中,与高度为 200 和 300 毫米的微型蒸渗仪相比,高度为 100 毫米的微蒸渗仪在润湿后长达 25 天的累积蒸发量分别低 52% 和 53%。开发用于计算土壤蒸发与润湿后天数和土壤覆盖百分比的关系的新模型显示出出色的性能(NSE > 0.95)。估计蒸发作为 ML 高度函数的实验进行了八次重复和三个不同的 ML 高度(100、200 和 300 毫米)。据观察,在所有实验中,与高度为 200 和 300 毫米的微型蒸渗仪相比,高度为 100 毫米的微蒸渗仪在润湿后长达 25 天的累积蒸发量分别低 52% 和 53%。开发用于计算土壤蒸发与润湿后天数和土壤覆盖百分比的关系的新模型显示出出色的性能(NSE > 0.95)。
更新日期:2022-06-21
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