The per mu water consumption of the drip irrigation greenhouse depends on the drip irrigation time, dripper flow rate, dripper spacing and other conditions.
5 hours of drip irrigation + 2 liters/hour flow rate for precise water supply, only 20 tons of water per mu. The labyrinth pattern is laid flat under the film with the surface facing up, shallowly buried to prevent burns, the drip irrigation tape and fertilizer nourish the roots simultaneously, the soil is moist and weed-free, and the undulating terrain can also save water and increase production by 30%. Timely water supply after installation can extend the life of the pipeline and avoid accelerated aging by sunlight.
The per mu water consumption of the drip irrigation greenhouse depends on the drip irrigation time, dripper flow rate, dripper spacing and other conditions.
If the drip irrigation time is 5 hours/time, the dripper flow rate is 2 liters/hour, the dripper spacing is 30 cm, and the laying length of the drip irrigation tape is 600 meters/mu, the water consumption is 20 tons/mu.
Adding fertilizer to the water can keep the root zone of the crop in a good state of water and fertilizer supply, thereby improving the yield and quality of the crop.
1. Water consumption of drip irrigation greenhouses
1. Water consumption per mu
If the drip irrigation time is 5 hours/time, the dripper flow rate is 2 liters/hour, the dripper spacing is 30 cm, and the laying length of the drip irrigation belt is 600 meters/mu, the water consumption per mu is 20 tons.
There is no uniform standard for the water consumption of greenhouse drip irrigation, which is mainly affected by the crop type, growth stage, climate and soil moisture. In practical applications, it is necessary to dynamically adjust the following factors:
Root depth: shallow root crops (such as leafy vegetables) require a single irrigation volume of about 10-15mm, and deep root crops (such as eggplant) require 15-25mm2.
Irrigation cycle: daily or alternate day irrigation is required during the high temperature period in summer, and can be extended to 3-5 days/time in winter12.
Water-saving design: zone rotation irrigation (about 20 mu/group) can balance the pump load and reduce peak water consumption2.
Tips: It is recommended to install a soil moisture sensor to accurately control the amount of water and avoid over-irrigation.
2. Benefits of drip irrigation
(1) The soil surface can be fully moistened, which can reduce the amount of ineffective water evaporation. No surface runoff is generated, it is easy to control the depth of water application, and it is relatively water-saving.
(2) Drip irrigation only moistens the soil near the roots of the crop, and the water content in other places is low, which can prevent weeds from growing.
(3) It is suitable for use in plots with undulating terrain and on different types of soil. At the same time, it can also reduce the number of inter-row cultivation and weeding to avoid soil compaction.
(4) If fertilizer is added to the drip irrigation water, the root zone of the crop can maintain a good water and fertilizer supply state, thereby improving the yield and quality of agricultural products.
2. Correct installation method of greenhouse drip irrigation belt
1. Carefully prepare the land and thoroughly clean the weeds, root stubble and stones in the soil to prevent the drip irrigation belt from being punctured.
2. Carefully read the instructions for use of each component of the drip irrigation belt and connect each component in the correct way.
3. When laying, the labyrinth side should be facing up (i.e. the embossed protrusion side should be facing up) and laid flat under the membrane. Do not lay it upside down or twist it.
4. After installing the main pipe, branch pipe, and auxiliary pipe, it is necessary to prevent the pipe from being crushed or scratched by agricultural machinery and tools, otherwise the service life will be reduced.
5. When laying with machinery, bearings must be placed on the pulley and rotating mechanism to ensure that the pulley can rotate flexibly. Do not stretch the drip irrigation tape during laying, otherwise the deformation of the labyrinth will affect the drip volume.
6. When laying, the drip irrigation tape can be buried shallowly to prevent focal burns, or a thin layer of soil can be laid on the drip irrigation tape to avoid the formation of lenses and burns.
7. After installing the drip irrigation tape, a special person should be arranged to manage it, and others should not be allowed to disassemble, install, open or close the valve without permission.
8. After installing the system, water should be supplied to the drip irrigation system in time to prevent the pipes and drip irrigation tapes from aging rapidly under the sun.
9. If the hole is facing downward, soil particles are easy to block the drip hole, and the water flow is unevenly distributed; facing upward can use gravity to diffuse the water flow and reduce the risk of sediment backflow.
10. Clean up sharp objects such as stones and root stubble to prevent puncturing the drip irrigation belt or lifting the ground film. Level the land to avoid the ground film hanging in the air to form a "lens effect" and burn the pipe belt.
11. Sequence: valve → filter → straight → branch pipe (wrap raw tape at the threaded connection). Branch pipe drilling: Use a special puncher to drill vertically (depth ≤ 1/2 of the branch pipe diameter), install the bypass and tighten the lock nut. Drip irrigation belt connection: Cut the port flat and insert the bypass to keep it naturally stretched without twisting.
12. The drip irrigation belt is laid flat under the ground film with the labyrinth side facing up, parallel to the ridge direction. Use a pulley with bearings when laying mechanically to avoid deformation caused by hard pulling.
The water consumption and correct installation method of the greenhouse drip irrigation system directly affect the irrigation efficiency and water-saving effect. The following are the key points of the comprehensive reference information:
III. Key points
Anti-blockage management: Thoroughly flush the pipe before first use; clean the filter regularly; operate according to the rotation irrigation zone, and prohibit overload operation36.
Daily maintenance: Avoid agricultural machinery from crushing the pipe; regularly check the blockage of the drip hole (minor blockage can be kneaded and unblocked)36.
Water quality requirements: Filtered water must be used to prevent tiny impurities from clogging the drip hole2.
Summary
The core of correct installation is orifice facing up + flat ground + standardized connection, combined with regular maintenance and precise water volume control, it can significantly improve water resource utilization and extend system life. In case of complex terrain, it is recommended to give priority to pressure-compensated drippers.