The irrigation technology of greenhouse vegetable seepage the greenhouse vegetable irrigation uses flood irrigation, which has the disadvantages of large water consumption, serious diseases, reducing room temperature and affecting the quality of vegetables. With people's demand for safer and nutritious high-quality vegetables, the new technology of micro water irrigation has been adopted by more and more vegetable farmers.
The experiment of greenhouse vegetable infiltration irrigation has been popularized for several years, and remarkable economic benefits have been achieved. The method is as follows: a horizontal monocular plastic thin pipe with a diameter of 10-15mm, a spacing of 35cm and a diameter of 1.2mm is tied on the pipe wall as a capillary, one is arranged every 1m, buried in the soil of 8-10cm underground, and vegetables are planted on both sides. The capillary head is connected with the plastic branch pipe with a diameter of 38mm by TEE, and the branch pipe head is equipped with a gate valve with the same diameter and connected with the water source. Open the gate valve when irrigating vegetables. In this irrigation method, the total investment of irrigation facilities in the shed is about 570 yuan / mu. It is a new cheap irrigation technology that everyone can do and can be used by every family.
"Runjia" small drip irrigation system is designed and manufactured by a Sino foreign joint venture, which is widely used for vegetable irrigation in greenhouse. The system design only needs 1m pressure head and 90% drip irrigation uniformity. The system has simple design and flexible installation. Each set of irrigation facilities (including water source project) is purchased in complete set, which is divided into 1 / 2 mu, 2 / 3 mu and 1 mu. All users need to do is add water to the water tank and open the valve to irrigate the crops.
The double wing hose micro irrigation belt is widely used in small-area fields such as solar greenhouses and greenhouses. It is very convenient for families to use. It has been popularized in tens of thousands of Mu across the country. The main features are good anti clogging performance, the use of underground water source can not use filtering equipment, and the operating water pressure is low (1-3m water column). The field pipelines at all levels adopt sheet coiled thin-walled hoses, which are small in volume and light in weight. Because there is no need to invest in expensive water purification and filtering equipment, it greatly facilitates the separate use of each household, which is in line with the current situation of rural areas in China.
The vegetable planting in the solar greenhouse is generally in the north-south direction, and the planting border is short. Therefore, the length of irrigation capillary is generally 678m, while the length of branch pipe is in the east-west direction, which is the length of the solar greenhouse. For vegetable planting in solar greenhouse, a plastic film is generally paved on each double ridge, and a capillary or micro irrigation belt is set under the plastic film, and sometimes two capillary tubes are also arranged. The center distance of double ridges is usually about 1m, so the typical arrangement spacing of drip irrigation capillary is 1m. The diameter of branch pipe is generally 25? 40mm, 10-15mm for capillary. Water supply facilities can build a pool at the head of the shed or use centralized water supply facilities that can provide a certain pressure and regulation and storage capacity for greenhouse irrigation. A control valve shall be installed at the head of the shed, and a water meter for measuring water volume shall also be installed for centralized water supply.
Drip irrigation and infiltration irrigation (collectively referred to as micro irrigation) for vegetables in greenhouse and solar greenhouse mainly have the following advantages: 1. It can reduce the relative humidity of indoor air by about 20%. 2. The use of micro irrigation will hardly cause the decline of ground temperature, which is conducive to crop growth. 3. Micro irrigation can also be combined with fertilization to send fertilizer directly to the root of crops and improve the utilization rate of fertilizer. 4. Reducing the humidity in the shed can greatly reduce vegetable diseases and insect pests. 5. Compared with flood irrigation, micro irrigation saves 50% - 90% water and 30% energy. 6. Micro water irrigation, less diseases and pests, less medication, safe and good quality of edible vegetables. 7. Using micro irrigation, greenhouse vegetables can increase income by 30% - 100%.