The main basis for the selection of drip in the drip irrigation is the quality of the product, the terrain, the crop species and the planting distance, and the soil properties. The drip drip system has a tube-type dripper and an inlay dripper, with a pressure compensated dripper and a non-pressure compensated dripper.
(1) manufacturing quality, the manufacturing quality of the drip has a great influence on the uniformity of irrigation. The smaller the drop in the dropper system, the more the drip is.
(2) terrain, terrain on the choice of the choice of the main drop in the body slope caused by the same position on the same capillary drip flow uneven, when the capillary direction of the slope is large, should choose a pressure compensated drip, Capillary design should also choose a longer pressure compensated drip, on the contrary, you should choose non-pressure compensated dripper.
(3) crop species and planting spacing, on the one hand is to determine the type of drip, on the other hand is decided to bow the flow. When planting crops for the planting of close planting crops, you can choose a fixed drip spacing of the lined drip irrigation tube, and when the irrigation object for the cultivation of irregular fruit trees or other crops, the general choice of tube-type drip, according to crop fixed drip spacing The
(4) soil properties, soil texture is the main factor in determining the drip flow, sandy soil vertical infiltration fast, the level of wet radius is small, should choose large flow of drip As for the choice of how much flow of the drip, should also plan wet layer Depth, planned wetting ratio and soil infiltration rate. (Such as: flow in the 1.5 to 2.0 liters / hour, sand droplets in the 0.2 to 0.4 meters, loam in the 0.4 to 0.7 meters, clay (soil) is the size of the soil, At 0.7 to 1.0 m).
In addition to the above situation to choose the drip, the general vegetable and field crops with drip 0.5-1 l / h, the working pressure of about 2 meters high water droplets; fruit trees with 2-4 liters / hour, the working pressure of 10 meters Left and right water column. Drip spacing: vegetable land every 30-50 cm a; field crops every 50-100 cm a; fruit trees around the tree bar a week, trees 4, 6-8 dots of trees.
Drip irrigation is a greenhouse water saving irrigation commonly used in a facility, different farmers have different methods of use, and some of the drip irrigation in the ridge under the film, and some will be buried in the soil. It is understood that different lengths, different setting methods require different drip fit. There are four types of drip drip often.
The first is the pressure compensated emitter.
Its characteristics: First, long-distance laying or pressure fluctuations can maintain constant current, irrigation evenly. The second is to automatically clean, the initial flow erosion flow channel, anti-blocking performance. Third, flexible and convenient, drip can be installed in a variety of specifications (diameter 12-23mm) on the hose. In the application, one is suitable for a variety of terrain and crops, especially some of the ground slope ups and downs of the larger situation. The second is suitable for the requirements of the laying of a larger length of the situation. Third, the use of drip spacing changes in the situation. Four is applicable to the pressure system instability.
The second is the labyrinth drip irrigation zone.
Its characteristics: First, the labyrinth channel and drip hole a vacuum overall hot forming, good adhesion, high manufacturing accuracy. Second, turbulent flow of porous water, anti-blocking ability. Third, the maze flow channel design, even water, can reach more than 85%, laying up to 80 meters. Four is light weight, easy installation and management, manual installation costs low.
The third is the inner cylindrical drip irrigation tube.
Its characteristics: First, within the back of the drip with a filter window, anti-blocking strong. Second, the turbulent channel design, irrigation evenly. Three is bow, the pipeline is strong. Fourth, the drip spacing can be flexible adjustment, for a wide range. Five is suitable for the laying of the rational drip irrigation.