大棚番茄营养生长期日蒸腾量估算模型研究

Estimation Model of Transpiration Per Day for Tomato in Vegetative Growth Period in Plastic-Covered Tunnel

基于大棚盆栽试验,分析不同水分处理条件下番茄单株日蒸腾量、单株总叶面积、气象因子、土壤水分状况等因素,建立了塑料大棚番茄营养生长期单株日蒸腾量估算模型,并进行模型检验。结果表明,在土壤含水率为95%FC～100%FC、80%FC～85%FC、65%FC～70%FC时,模型决定系数R2分别为0.85、0.84、0.86,平均相对误差分别为13.24%、14.64%和14.70%。所建模型的参数较少且易获取,预测的精度较理想,可以较好地估算塑料大棚番茄营养生长期单株日蒸腾量。

Based on pot experiments, the estimation model was established by analyzing parameters such as transpiration per day per plant, total leaf area per plant, meteorological factors and soil moisture under dif- ferent water treatments. The model was verified according to measurement data of different sowing dates in a year. The results showed that the coefficients of determination （R2） of the model under different soil water gradients （95%FC-100%FC, 80%FC-85%FC, 65%FC-70%FC） were 0.85, 0. 84, 0. 86 and the average relative errors（MRE） were 13.24~, 14. 64%, 14.70%, respectively. The model could be used to predict tomato transpiration per day in vegetative growth period.