Traditional surface irrigation methods can fully meet the water requirements of crops; the technical requirements are not high, easy to master the use of and simple management; equipment investment is provincial, low operating costs; applicable to the texture of the denser soils, in the sandy soils will produce a large number of deep leakage losses; easy to over-irrigation, resulting in the rise of the groundwater table, soil stains and salinization, or along the surface of the field water run-off phenomenon, resulting in a waste of water resources; the land leveling requirements are high, the terrain is complex areas of land leveling investment is relatively large. The requirement of land leveling is high, and the investment of land leveling is relatively large in areas with complicated terrain. Therefore, the ground irrigation method than sprinkler and drip irrigation should pay more attention to improve and enhance its irrigation technology, in order to achieve water conservation, labor-saving, stable yield, high yield and low-cost purposes.
In the orchard under grass conditions, flood irrigation and long border irrigation, are very wasteful of water, water flow by the interception of grass, near and far from the water source of different sections, the irrigation volume varies greatly. The following water-saving surface irrigation methods should be implemented to stop diffuse irrigation and long-border irrigation:
①Small-border irrigation. It is possible to have one border for one fruit tree, or 2-4 fruit trees in one border. The smaller the border, the more water-saving it is. The smaller the border, the more water-saving. Small-border irrigation has to build main canals, branch canals and fur canals, which affects the mechanical operation of the orchard, and is suitable for small orchards contracted by families. Can also be used to replace the soft plastic pipe branch canals, nullahs, the original channel footprint can be slightly elevated, so that walking machinery, inhibit the ridge and the ridge of the border and affect the shortcomings of the mechanical operation, and save water, it is worthwhile to advocate, but the hose should be connected to a certain pressure on the faucet, there are some orchards and pipeline with the spraying of medicine with a water supply system, it is also very convenient.
② fine flow furrow irrigation. That is, the rows of temporary irrigation by the machinery to open a number of furrow irrigation. With the ditch with irrigation, and timely mulching to preserve moisture.
Therefore, to improve the traditional furrow, border irrigation technology, improve field water utilization and irrigation uniformity, reduce the irrigation quota is a small investment, easy to operate, the effect is significant agricultural water conservation measures to increase production.