负水头供水盘埋设方式对番茄生长和水分利用率的影响

以番茄为材料,于温室内采用负水头供水盆栽装置进行试验,研究了供水盘不同埋设方式对番茄生长和水分利用率的影响,旨在为负水头灌溉技术应用于蔬菜栽培提供依据。试验设置3个处理,单盘倾角9°埋设于根系底部(处理Ⅰ)、单盘竖向埋设于根系一侧(处理Ⅱ)和双盘埋设于根系两侧(处理Ⅲ)。结果表明:处理Ⅱ控制的土壤含水量有利于控制植株长势、增加茎粗和叶片数量、降低番茄植株耗水量,显著提高水分利用率;处理Ⅱ分别与处理Ⅰ和Ⅲ相比,单株番茄增产12.70%和15.45%,节水18.14%和13.70%。结果表明,单盘竖向埋设于根系一侧为最佳供水盘埋设方式,可获得高产、节水的效果。

Effects of embedding methods on water supplying device with negative pressure toward the growth of tomatoes and their water use efficiency

Based on a pot experiment ,the effects of embedding methods on water supplying device with negative pressure toward the growth of tomatoes and their water use efficient were studied in the green house ,which could provide the theoretical basis for vegetable cultivation with the negative pressure irrigation technology .There were three treatments in this study including a water-supplying disc embedded at the roots of tomato with the angle of 9°(treatment I ) ,a disc embedded only at one side of plant roots vertically (treatment II ) ,and two parallel discs embedded at two sides of plant roots vertically (treatment III ) .The results showed that soil moisture content by treatment II was helpful to control plant growth ,increase the stem diameter ,accelerate the leaf numbers ,and reduce the water volume consumption ,which had a significantly improvement in water use efficiency .Compared with treatments I and III ,the yield per plant with treat-ment II became increased by 12 .70% and 15 .45% ,causing 18 .14% and 13 .70% savings of water ,respectively . Therefore ,embedding the water-supplying disc at one side of roots of tomato vertically (Treatment II ) is the best way for high yield and water saving .