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.