根区局部控水无压地下灌溉技术在温室大棚中的试验研究

为了探明根区局部控水无压地下灌溉技术参数和指标，通过在蔬菜大棚中种植黄瓜的试验，研究分析了在不同供水压力条件下的孔口出水规律和根区局部湿润状况。研究结果表明：无压灌溉的灌溉水量转换为土壤水主要集中在出水孔周围20 cm范围内，能够满足黄瓜的需水要求；该灌溉技术并不降低作物产量，与滴灌相比可实现节水25%以上。具有节能、节水、优质的综合效应，为蔬菜大棚中的应用提供了理论依据。

Experimental study on the technology of partial rootzone non-pressure subirrigation applied in greenhouse

In order to research technical parameters and irrigation indexes of partial rootzone non-pressure subirrigation, the law of outlet flow rate at different aperture diameters and the soil water status were analyzed through cucumber experiment in greenhouse. The results indicated that irrigation water of non-pressure subirrigation was chiefly concentrated in the diameter of 20 cm around the aperture, which met the water demand of cucumber. The cucumber yield was not decreased, and irrigation water could be saved by 25% compared with drip irrigation. The techniques had compositive effects in saving energy, saving water, good quality. Therefore, the results of research may be applied in greenhouse.