Greenhouse water-fertilizer-gas integrated intelligent irrigation and waste liquid recovery system

Abstract

The invention relates to a greenhouse water-fertilizer-gas integrated intelligent irrigation and waste liquid recovery system. The system comprises a control unit, and a water supply unit, a water-fertilizer coupling unit and an irrigation unit connected sequentially through a pipeline; a disinfection and air-entrapping unit is further installed between the water-fertilizer coupling unit and the irrigation unit, the outlet end of the irrigation unit is connected with the inlet end of a waste liquid backflow treatment unit, and the inlet end of the irrigation unit is connected with the outlet end of the waste liquid backflow treatment unit through the pipeline; the disinfection and air-entrapping unit comprises a magnetizing device, an air-entrapping and disinfection device and a gas-liquidmixing pump; the air-entrapping and disinfection device comprises an air purifier and a gas pump connected with the inlet end of the air purifier; a control system comprises a controller and a human-machine interaction interface. Compared with the prior art, disinfection treatment is conducted before air-entrapping treatment, which promotes the respiratory efficiency of plant roots and reduces the risk of plant root poisoning, and by recycling waste liquid, environmental pollution and resource waste are reduced.

Description

technical field [0001] The invention relates to the technical field of agricultural irrigation facilities, in particular to a greenhouse water, fertilizer and gas integrated intelligent irrigation and waste liquid recovery system. Background technique [0002] Greenhouse soilless cultivation technology has been widely used all over the world because of its clean and tidy, high space utilization rate, high quality and yield, and easy management. Accumulation of radix, secondary salinization of soil, deterioration of soil physical and chemical shape, self-toxic secretion of roots and other successive cropping obstacles. At the same time, the growth and development of plants is inseparable from the five factors of water, fertilizer, air, heat, and light. Greenhouse soilless cultivation technology can better control the factors of water, fertilizer, light, and heat. By coordinating the relationship between various factors The purpose of controlling plant growth and development ...

AI Technical Summary

Problems solved by technology

[0003] However, the current greenhouse soilless cultivation technology has the following defects: ①The respiration of plant roots plays a decisive role in the overall growth and development of plants, and the lack of oxygen in the roots will limit the development of the roots, thereby affecting plant growth. It can increase the respiration intensity of the root system, promote the development of the root system and plant growth, and finally increase the yield and quality of the crops. Because the root system of the plant is relatively fragile, the original air contains a large number of harmful bacteria, viruses and other harmful substances. Aeration of the root system can easily cause root pollution, thereby affecting the development of the root system; ② In order to prevent the growth of bacteria and viruses in the nutrient solution, the nutrient solution needs to be replaced regularly, so a large amount of waste nutrient solution is generated, resulting in waste of resources and environmental pollution. On the one hand, it leads to the waste of water and fertilizer resources; on the other hand, it greatly increases its cost, which hinders the large-scale promotion of greenhouse soilless cultivation technology

Images