Generally speaking, the smaller the flow rate of the emitter, the more conducive to the uniform diffusion of water in the soil, especially when using water to fertilize, which can reduce the waste of fertilizer and improve the utilization efficiency of water and fertilizer. At present, the minimum flow rate of emitters manufactured by Netfim can be as low as 0.4 liter/hour. When the irrigation amount is appropriate, the slower the irrigation, the less it will crowd out the gas in the soil, which will easily form a state of water-gas balance and create an environment more conducive to the growth of crop roots. The smaller the emitter flow in the field, the more beneficial it is to extend the laying distance of drip irrigation pipe, reduce the number of branch pipes and valves in the field, and then save the cost. Moreover, Netfim small flow emitter has its patented flow channel design, so it has good hydraulic performance and anti-clogging performance.
To sum up, the advantages of small flow technology in irrigation are:
1, small flow technology can further simplify the layout of irrigation system, improve the control area of a single rotation irrigation group, and facilitate the mechanized operation in the field.
2. Small flow technology further improves the utilization rate of water, fertilizer, electricity and other resources.
3. Small flow technology improves the quality and yield of crops.
Naitefim chose a 720-mu plot in Inner Mongolia, which is high in the east and low in the west, with an overall drop of about 10 meter, and compared it with emitters with different flows, so as to visually compare the effect of small-flow technology. The water source of this land is located in a relatively low place near the southwest corner of the plot, and the crops planted are potatoes. As a comparison, the rated flow rate of type A emitter is 1. 1L/H, and that of type B emitter is 0.8l/h. In the comparison of these two schemes, the design requirements and product types are the same except that the emitter flow rate of drip irrigation belt is different.
As can be seen, the comparison of using A and B transmitters is as follows:
In this case, the total quantity of PVC-U water main pipe is slightly reduced and some pipe diameters are also reduced after using a small flow (0.8L/H) type B emitter. The number of field control valves is obviously reduced; However, the total amount of FlexNet flexible pipe used as a branch water delivery pipe is also greatly reduced. Therefore, the construction and installation costs are also reduced.