节水灌溉方式（Water saving irrigation mode）.doc

节水灌溉方式（Water saving irrigation mode） Obtaining maximum yield or yield with minimal water consumption, i.e., irrigation measures to maximize crop yield and output per unit of irrigation water. The main measures are: canal seepage control, low pressure pipe irrigation, sprinkler irrigation, micro irrigation and irrigation management system. To sum up, there are 5 kinds of water-saving irrigation types which are widely used in our country. 1, channel anti-seepage Channel water conveyance is the main water conveyance mode of farmland irrigation in china. The traditional canal canal system water use coefficient is generally 0.4 - 0.5, only about 0.3 of the difference, that is to say, most of the water leakage and evaporation losses. Channel seepage is the main aspect of farmland irrigation water loss. The canal seepage control technology, can generally make the canal water utilization coefficient increased to 0.6 - 0.85, 50% - 70% increase than the original canal. Channel seepage control is also one of the main measures of water saving irrigation in China, which has the advantages of fast water conveyance, favorable for agricultural production, robbing the season and saving land. 2, drip irrigation Drip irrigation is the use of plastic pipes to pass water through an orifice or drip head about 10mm in diameter to the root of the crop for partial irrigation. It is one of the most effective water-saving irrigation methods in arid and water shortage areas, and the utilization rate of water is up to 95%. Compared with sprinkler irrigation, drip irrigation has higher water saving and yield increasing effects. At the same time, it can increase fertilizer efficiency by more than one time. The utility model can be used for irrigation of fruit trees, vegetables, economic crops and greenhouse, and can also be used for irrigation of field crops in drought and water shortage places. The disadvantage is that the tip is easy to scale and clog, so the water should be filtered strictly.