Drip irrigation, sprinkler irrigation technology profile?

Drip irrigation is the frequent and slow dripping of water to the soil at low pressure through dry pipes, branch pipes and drip heads on capillary tubes; it is an irrigation system that supplies filtered water, fertilizers or other chemicals, etc. directly to the soil. It has no sprinklers or furrow runoff, but only allows the water to drip out slowly and into the soil by gravity and capillary action. The water is dripped into the vicinity of the crop's roots so that the soil in the main root zone of the crop is constantly maintained at optimum water content. This is an advanced irrigation method.

(a) the characteristics of drip irrigation drip irrigation compared with diffuse irrigation and sprinkler irrigation, has the following characteristics:

1. Save water and labor, increase production and income. Because of irrigation, water is not air movement, not wet leaf surface, there is no effective wetting area outside the soil surface evaporation, so the direct loss of water evaporation at least; easy to control the amount of water, does not produce ground runoff and deep soil seepage. Therefore, it can save 35%-75% of water than sprinkler irrigation. Less water and water-scarce mountainous areas to achieve water conservancy opened up a new way. Due to the plants are not supplied with sufficient water, weeds are not easy to grow, so the interference between crops and weeds for nutrients is greatly reduced, reducing the weeding labor. Because the crop root zone can maintain the best water supply and fertilizer state, so it can increase yields.

2. Drip irrigation system is more expensive. Due to the impact of impurities, mineral precipitation will make the capillary drip head clogging; drip irrigation uniformity is not easy to ensure. These are the current large-scale promotion of drip irrigation technology obstacles. Currently generally used for tea, flowers and other cash crops.

(C) the classification of drip irrigation system

1. Fixed drip irrigation system. This is the most common. In this type of system, the capillary and drip head are immobile throughout the irrigation period. Therefore, for drip irrigation of densely planted crops the amount of capillary and drip head is large, and the equipment investment in the system is high.

2. Mobile drip irrigation system. Plastic pipe fixed in some bracket, through some equipment to move the pipe bracket. Another is similar to the clockwise sprinkler, rotating around the center of the branch pipe 200 meters long, supported by five towers. The above are mechanically mobile systems. Artificial mobile drip irrigation system is a branch pipe and capillary by artificial day and night movement of a drip irrigation system, its investment is the least, but not labor-saving.