There are many advantages of hose micro-sprinkler irrigation under plastic film for protected vegetables.

The hose micro-sprinkler irrigation system under plastic film for protected vegetables is a kind of water-saving irrigation method which uses the micro-irrigation belt under plastic film to distribute water evenly into the soil layer of vegetable roots. This method does not produce a large number of stagnant water turbulence, which not only reduces the waste of water, but also reduces the evaporation of water.

I. composition of components

The system includes water supply equipment, water pipe, micro-spray belt, special joint, fertilizer absorber, filter, tee, plug and other components.

2. Main points of installation

1. Prepare before installation. First of all, apply sufficient base fertilizer to prevent late de-fertilization, and then level the land to lay micro-irrigation belts and water pipes on the border or the ground, so as to avoid protuberance and concave and bring difficulties to hose water delivery.

two。 Installation supervisor. Install a filter at the interface between the water source and the water pipe to prevent the entry of impurities in the water, and then lay the water pipe and connect it with the fertilizer absorber in the front, so that the water and fertilizer are applied simultaneously, and the bed extends to the bottom of the front roof.

3. Arrange the micro-spray belt. Lay a micro-irrigation belt on the border surface (or between the ridges), seal its tail end, and the microhole is upward. Cut out the corresponding installation hole with scissors according to the position of the micro-irrigation belt.

4. Install the connector. Plug the inner joint equal to the number of installation holes into the pipe from both ends of the water pipe and move it to each hole for extrusion in turn. Put on the rubber pad and tighten the outer joint.

5. Connect the micro-irrigation belt. Place the micro-irrigation belt in the ring at the end of the joint and put it on the joint vigorously. Straighten the water pipe, cover it with plastic film, seal the tail of the water pipe, and connect the other end to the water source.

Matters needing attention

1. Regularly overhaul and maintain the water-saving irrigation equipment and replace it in time when it is found to be damaged. Keep all parts clean, especially the filter should be checked and cleaned frequently to prevent the micro-spray hole from clogging and affect the use effect.

two。 Fertilizers and pesticides should be fully dissolved and impurities should be filtered to maintain the normal operation of the micro-sprinkler irrigation system. It is best to filter the gauze at the fertilizer outlet to prevent blockage and play a good effect.

3. Straighten each hose before the valve, and then open the valve to fill the pipe and check whether the hose hole is blocked, such as pinch it by hand to make it unobstructed and improve the irrigation effect.

4. According to the type of vegetables, growth period and other water demand to control the water supply, to avoid excessive irrigation, can not achieve the desired effect.

IV. Advantages

Compared with the traditional furrow irrigation, it has the following advantages:

1. Save water. The implementation of micro-sprinkler irrigation under plastic film can greatly reduce evaporation between plants. compared with traditional flood irrigation, the water-saving rate is about 50%.

two。 Improve fertilizer efficiency. With the application of hose micro-sprinkler irrigation technology, the bottom fertilizer is concentrated, water permeates slowly in the soil, and the loss of nutrients is avoided. At the same time, topdressing with water is beneficial for vegetables to evenly absorb nutrients and water, and then improve the utilization rate of fertilizer.

3. Improve the physical and chemical properties of soil. The application of hose micro-sprinkler irrigation technology has the advantages of long water supply time, slow speed, loose soil, small bulk density and moderate soil pores, reduces the degree of soil acidification and salinization, creates a good soil environment for the normal growth of vegetables, and the growth of vegetables is balanced and consistent.

4. It can effectively improve the mild temperature in the interior of the shed. Compared with border irrigation, the ground temperature can be increased by 3 ℃ ~ 6 ℃ and the air temperature can be increased by 1 ℃ ~ 3 ℃, which can effectively promote the growth and development and yield of vegetables.

5. Reduce the chance of infection of diseases and insect pests. The application of hose micro-sprinkler irrigation technology to feed water slowly and evenly, coupled with plastic film mulching, the water evaporation coefficient in the soil is very small, the air relative humidity is more than 23% lower than that without application, and the leaf surface is kept dry for a long time, which effectively reduces the infection of various pathogens and prevents the occurrence of various diseases.

6. Increase production and income. By using this technology, the effect of water conservation, fertilizer conservation and pesticide application in the shed is good, the supply of fertilizer and water supply is balanced, and the growth is neat, which can prevent the occurrence of late de-fertilization and diseases and insect pests, increase the yield by more than 20% per mu, improve product quality and increase income.

7. Low investment and labor saving. Water pipes and micro-spray belts are made of thin-walled plastic hoses that can be pressed into sheet coils, which is one of the low-priced micro-irrigation products, with an investment of only about 400 yuan per mu. The water supply of hose micro-sprinkler irrigation does not need manual canal protection to change water, which reduces labor.

Li Aiyong, Agricultural Bureau of Dingxing County