Department of Horticulture and Breeding, Andong National University, Andong, 36729, South Korea.
Department of Horticulture and Breeding, Andong National University, Andong, 36729, South Korea.
Plant Physiol Biochem. 2021 May;162:388-394. doi: 10.1016/j.plaphy.2021.03.005. Epub 2021 Mar 5.
Transpiration can directly reflect the response of the crop growth and development, therefore irrigation design based on a transpiration model is an important factor towards establishing an efficient irrigation strategy. Thus, the purpose of this experiment is to develop and verify a tomato transpiration model by correcting the relationship between the transpiration rate and environmental factors by measuring the actual transpiration rate. The actual crop transpiration rate, which is measured using a load cell, and the weight changes calculated at 10-min intervals, are applied to the development of the transpiration model. The experimental results show that the transpiration rate has no linear relationship with the radiation amount (Rad) or vapor pressure deficit (VPD). The relationship between Rad and VPD with transpiration rate was fitted by the exponential rise to maximum, and gaussian peak curve, respectively. This allowed a transpiration model to be developed by compensating the Rad and VPD based on the existing Penman-Monteith (P-M) equation. The developed transpiration model showed higher regression constant values than the existing one. The developed transpiration model from the experiment can be utilized for precise irrigation control.
蒸腾作用可以直接反映作物生长发育的响应，因此基于蒸腾模型的灌溉设计是建立高效灌溉策略的重要因素。因此，本实验的目的是通过测量实际蒸腾率来修正蒸腾率与环境因素之间的关系，从而开发和验证番茄蒸腾模型。使用称重传感器测量的实际作物蒸腾率和每 10 分钟计算的重量变化应用于蒸腾模型的开发。实验结果表明，蒸腾率与辐射量（Rad）或蒸气压亏缺（VPD）之间没有线性关系。通过指数上升到最大值和高斯峰曲线分别拟合 Rad 和 VPD 与蒸腾率的关系。这使得可以通过补偿现有彭曼-蒙特斯（P-M）方程中的 Rad 和 VPD 来开发蒸腾模型。开发的蒸腾模型的回归常数值高于现有模型。从实验中开发的蒸腾模型可用于精确灌溉控制。
