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本试验通过滴灌、微喷灌、多孔管喷灌和沟灌等四种灌水方式,得出滴灌、微喷灌和多孔管喷灌均较沟灌有明显的节水效果,节水率可达50％以上;除沟灌外,其它灌水方式棚内空气相对湿度均较低,这对缩短夜间结露时间和减轻或防止黄瓜的病害有一定的积极作用。多孔管喷灌管件连接方便,不易堵塞,成本低,是目前塑料大棚黄瓜栽培较理想的灌水方式。 春茬黄瓜在土壤水势达330或450mmHg的产量最高,此时土壤实际含水量为22.8％,相当于田间持水量的80.3％,以上指标可作为本地区塑料大棚黄瓜灌水开始点的标准。
In this experiment, drip irrigation, micro sprinkler irrigation, perforated pipe sprinkler irrigation and furrow irrigation were used to study the effects of drip irrigation, micro-sprinkler irrigation and perforated pipe sprinkler irrigation on water saving. The water-saving rate was more than 50% In addition, the relative humidity of air in other irrigation methods was lower, which had a certain positive effect on shortening the condensation time at night and reducing or preventing cucumber diseases. Porous pipe sprinkler pipe connection convenient, easy to plug, low cost, is the ideal plastic greenhouse cultivation of cucumber irrigation. Spring crop cucumber in the soil water potential up to 330 or 450mmHg the highest yield, soil actual water content at this time was 22.8%, equivalent to 80.3% of the field water capacity, the above indicators can be used as the starting point of plastic cucumber irrigation area standard.