基于Jensen模型的红枣水分生产函数及敏感指数研究

Research on Water Production Function and Sensitive Indexes Based on Jujube Jensen Model

【目的】研究滴灌条件下红枣各生育期水分亏缺对产量的影响,明确红枣各生育期水分敏感指数和关键需水期。【方法】通过对红枣各生育期不同水分亏缺处理,分析红枣灌水量和耗水量、耗水量和产量的关系,分析各生育期内水分亏缺对产量的显著性影响。根据红枣产量和不同生育阶段的耗水量关系,建立基于Jensen模型的水分生产函数,利用转换方程组解出相关参数。【结果】红枣水分敏感指数(萌芽展叶期0.089;开花坐果期0.324;果实膨大期0.392;成熟期0.068)。【结论】果实膨大期为影响产量的需水关键期,萌芽展叶期和成熟期水分亏缺对产量影响小。

[ Objective] This project aims to research the effect of water deficit on the yield of jujube in different growth stages under drip irrigation, and to determine the water sensitivity index of each growth period, and to determine the critical water requirement period. [ Method ] This paper analyzed the relationship between water consumption and yield, and the effect of water deficit on yield in different growth stages. Based on the relationship between jujube yield and water consumption in different growth stages, the water production function based on Jensen model was established. [ Resdt ] Jujube water sensitive indexes （ bud and leaf 0. 089; flowering stage 0. 324; fruit enlargement period 0. 392; mature period 0. 068 ） were determined. [ Conclusion ] The fruit enlargement period is the critical period of water requirement, and water deficit during the germination and mature stage has little effect on the fruit yield.