保护地番茄渗灌适宜灌水控制上限的研究

Suitable Upper Control Limit of Subsurface Irrigation in Tomato Cultivation

用田间小区试验的方法,研究了保护地栽培番茄渗灌不同灌水控制上限(单次灌水量)对番茄耗水特点、灌溉水水分利用效率等的影响。渗灌管埋深为30 cm、计划湿润层30 cm且其湿润比取0.5、灌水控制下限为土壤水吸力30 kPa。试验结果表明,灌水控制上限取土壤水吸力8 kPa、单次灌水量取145 m3/hm2时,有利于番茄植株生长发育,可以实现高产、节水的目标。

Using the method of field experiment,we studied on the cultivated tomato in greenhouse（Irrigation quantity per time）with the influence of different upper irrigation limit on the efficiencies of tomato using water.When node permeation irrigation pipelines were buried at 30 cm underground,the designed moistened soil layer 30 cm below soil surface,the wetted ratio was 0.5,and the low irrigation limit was 30 kPa.Results show that,with the upper irrigation limit 8 kPa in soil water suction,we obtain well economical results than other conditions.The objectives of high-yield and water-saving could be achieved by node permeation irrigation in greenhouse.