It is understood that at present, most of the greenhouse vegetable cultivation in this city relies on the extraction of shallow surface water, which not only wastes valuable groundwater resources and high irrigation costs, but also because of the high salt content, which is not suitable for vegetable production. It is urgent to develop new irrigation water. Water source. The city's vegetable industry technology system water and fertilizer expert team surveyed and found that the effect of watering vegetables is very good by accumulating rainwater flowing on the membrane surface of the greenhouse in summer. To this end, this year, the country's first facility greenhouse rainwater cellar was established in the sixth port old vegetable district of Xinkou Town, Xiqing District. This rain-collecting cellar is not a traditional water cellar, but a new soft rain-collecting cellar, which makes full use of rainwater flowing from the greenhouse membrane surface for storage. Compared with intercepting surface rainwater, the water quality is better and there is no ground pollutants. .
According to reports, according to the annual rainfall of 500 millimeters, each greenhouse membrane surface can collect rain of 100 cubic meters, which can not only meet the needs of vegetable irrigation water, but more importantly, because the rainwater has low salt content and slight acidity, it is very suitable for vegetables. Growth can increase the yield of vegetables by more than 20%. According to the calculation of 600,000 mu of greenhouses in this city, if all this technology is implemented, the annual amount of groundwater will be saved very considerable.
