温室膜下滴灌甜瓜需水量与水分生产函数研究

对日光温室膜下滴灌条件下甜瓜耗水规律、产量以及水分生产函数进行了研究。结果表明:甜瓜水分消耗呈现开花前期与开花—坐果期小、膨大期大、成熟期小的规律,耗水高峰出现在膨大期。甜瓜产量与总耗水量之间呈二次抛物线关系,最佳灌水量为112.39 mm。同时,应用Jensen模型拟合了甜瓜水分生产函数,水分生产函数的敏感指数按膨大期→开花-坐果期→成熟期→开花前期的顺序依次降低。

Water Demand and Water Production Function for Muskmelon under Mulched Drip Irrigation in Greenhouse

In order to study the water-consuming law、yield and water production function of muskmelon,an experiment with drip irrigation under mulch film in greenhouse was carried out.The results showed that the amounts of water consumption in early florescence,fruit-setting stage,and late-fruit stage were lower than that at bloom stage;And the maximum average daily amount of water consumption comes from the stage of fruit development.The relationship between the total yield and the total amount of water consumption was quadratic parabola and the optimal irrigation amount was 112.39 mm.At the same time,the water production function of muskmelon was fitted by using the model of Jensen.Water sensitivity indices went down successively from bloom,fruit-setting stage,late-fruit stage to early florescence stage.