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水是万物生长的源泉,而水资源缺乏是制约我国农业发展的重要因子。蔬菜需水量很大,俗话说“斤菜担水”。大水漫灌浪费水,又会带来土壤板结,泼浇的劳动强度大,花工也多。因此,园艺场或棚群的总体规划都把灌溉系统放在重要的位置。近三年来,随着我市设施栽培和外向型蔬菜生产的蓬勃发展,我们对节水灌溉系统进行了有益尝试。全市推广面积达72公顷,取得了较好效果。 一、系统的组成 我市节水灌溉系统由水源、沉淀、施肥池、泵、过滤器、输水管和滴管、微喷组成。（1）水源:水源可以是井水、塘水、河水等可供农业灌溉的水资源,以水质清、杂质少为好、通过明渠或暗管输入沉淀、施肥池中。（2）沉淀、施肥池:池大小20m~2左右,每5-10亩1只。池与输水管相连,由潜水泵、管道泵或自吸泵供水。（3）过滤器:外过滤器用10mm钢筋焊成,直径50cm,与池等高,外围40目铜网,用白铁皮条箍紧。内过滤是把水泵入装有滤网的压力容器中过滤后,通过连接管与输水管相连,并装有反冲污物的回流管道和排污口,效果较外过滤好,但过滤器较复杂。（4）输水管:主管采用50mm聚丙管,在畦头和棚头内侧埋入地下 50cm,每棚或每隔8m有50×25mm 三通开口,用25mm聚丙管引出地面,与畦齐平,同时接上阀门,根据供水需要开启。（5）滴管与微喷装置:?
Water is the source of growth of all things, and the lack of water resources is an important factor that restricts the development of agriculture in our country. Vegetable water demand is large, as the saying goes, “jin cabbage water.” Water flood irrigation waste of water, will bring soil compaction, pouring labor intensity, flower workers and more. Therefore, the overall planning of horticultural farms or sheds places an emphasis on irrigation systems. In the recent three years, with the vigorous development of facilities cultivation and export-oriented vegetable production in our city, we have made beneficial attempts on water-saving irrigation systems. The city’s promotion area of 72 hectares, and achieved good results. First, the composition of the system Our city water-saving irrigation system from the water, sedimentation, fertilization pool, pumps, filters, pipes and dropper, micro-spray. (1) Water source: Water source can be well water, pond water and river water which can be used for agricultural irrigation. Water quality is clear and impurities are not as good. Input sedimentation and fertigation pond through open channel or underground pipe. (2) precipitation, fertilization pool: pool size of about 20m ~ 2, every 5-10 acres 1. The pool is connected to the water pipe by submersible pumps, pipe pumps or self-priming pumps. (3) filter: external filter welded with 10mm steel, diameter 50cm, and the pool contour, the outer 40 mesh copper mesh, with a white metal band hoops tight. Internal filtration is the pump into the pressure filter with a mesh filter, connected through the connecting pipe and the water pipe, and equipped with a backwash of sewage pipes and sewage outfall, the effect is better than outside the filter, but the filter is more complex . (4) Water pipe: The supervisor adopts 50mm polypropylene pipe, buried 50cm below the pipe head and the inside of the shed, 50 × 25mm tee opening at every shed or every 8m, leads the ground with 25mm polypropylene pipe, At the same time connected to the valve, according to the water needs to open. (5) dropper and micro-spray device:?