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以茄子为试材,采用温室膜下滴灌方法对茄子最适宜生长的温度、水分胁迫指数和干物质转化因子等3个作物生长模型参数进行了率定,研究了温室膜下滴灌茄子的经济灌溉制度及其灌水下限值。结果表明:采用经济灌溉制度比实际灌水有显著的增产增收效益,每公顷产量和效益分别增加4.22t和1.367万元,节约灌溉水量8.235%;茄子经济灌水下限值为0.239,占田间持水率的85.3%(以0~60cm土层平均含水率表示),变异系数为0.245%。按照该灌水下限值灌水,可使单位面积的灌溉效益最大。
Eggplant was used as experimental materials to determine the optimal growth parameters of eggplant, such as temperature, water stress index and dry matter conversion factor. The effects of drip irrigation with eggplant under greenhouse irrigation System and its lower limit of irrigation. The results showed that economic irrigation system had significant yield increase and income benefit compared with actual irrigation, yield and benefit per hectare increased by 4.22t and 13,670 yuan, respectively, saving irrigation water volume of 8.235%; lower limit of economic irrigation of eggplant was 0.239, accounting for field water holding Rate of 85.3% (0 ~ 60cm average soil moisture content), coefficient of variation of 0.245%. Irrigation in accordance with the lower limit of irrigation, irrigation per unit area can make the most benefit.