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根据番茄的生长发育特点,分别以50%、60%、75%田间持水量作为苗期、花期、结果期的土壤水分下限,按照不同的土壤水分上限设置不同的灌水量处理。对番茄不同生育期的灌水量、耗水量、产量、水分利用效率及其关系进行了研究。结果表明,灌水控制上限和下限之间存在交互效应,番茄灌水量、耗水量与其具有显著的正相关性;当灌水控制下限一定时,耗水强度和耗水模数随灌水控制上限的减小呈降低趋势;番茄苗期、花期和结果期的灌水控制上、下限(占田持)分别控制在50%～65%、60%～75%和75%～85%为宜。
According to the growth and development characteristics of tomato, 50%, 60% and 75% of field water holding capacity were used as the lower limit of soil moisture at seedling stage, flowering stage and fruiting stage respectively, and different irrigation levels were set according to different upper limit of soil moisture. The irrigation amount, water consumption, yield, water use efficiency and their relationship of tomato at different growth stages were studied. The results showed that there was an interactive effect between the upper and lower irrigation control limits. There was a significant positive correlation between tomato irrigation and water consumption. When the lower irrigation control limit was reached, the water consumption intensity and water consumption modulus decreased with the upper limit of irrigation control (P <0.05). The upper and lower limits of control (50% -65%, 60% -75% and 75% -85%) of irrigation control in tomato seedling, florescence and fruiting stage were appropriate.