Microspray irrigation precision control method for greenhouse seedling culture

Abstract

The invention relates to the field of agricultural spray irrigation, in particular to a microspray irrigation precision control method for greenhouse seedling culture. The microspray irrigation precision control method comprises the following steps: S1, establishing a crop growth cycle model and performing a multi-electrode combination on electrodes of a multi-electrode sensor; S2, according to an actual crop growth cycle model, measuring a relative humidity around seedlings in a non-microspray irrigation state by using the multi-electrode sensor, and when the measured relative humidity is lower than a set value, starting microspray irrigation nozzles; S3, automatically switching two working electrodes of the multi-electrode sensor while starting the microspray irrigation nozzles, and measuring water demand in a microspray irrigation state by using the multi-electrode sensor; and S4, after the microspray irrigation is finished, automatically switching the two working electrodes of the multi-electrode sensor, and repeating S2 and S3. The microspray irrigation precision control method can accurately measure relative humidity value of the seedling production environment, accurately control the water demand in the microspray irrigation process, realize automatic, large-scale and remote production of greenhouse seedlings, and greatly improve production quality of greenhouse seedlings.

Description

technical field [0001] The invention relates to the field of agricultural sprinkler irrigation, in particular to a precision control method for micro-spray irrigation in greenhouse seedling cultivation. Background technique [0002] At present, seedling cultivation mainly relies on manual experience for sprinkling irrigation, and it takes 4-5 years for general technicians to have certain experience in sprinkling irrigation for seedling cultivation. This method of sprinkling irrigation for seedling cultivation is not only time-consuming and labor-intensive, but more importantly, excessive water is applied to the seedling cultivation in order to keep the humidity of the seedling cultivation at a constant humidity, thereby easily causing the failure of seedling cultivation. In recent years, industrialized seedling raising techniques in various countries and regions have developed rapidly in the cultivation of vegetables, flowers, tea gardens, etc. Micro-sprinkler irrigation is ...

AI Technical Summary

Problems solved by technology

[0003] my country's greenhouse production started late and is an emerging industry. Greenhouse seedling cultivation is in its infancy, with a low degree of automation, which is not conducive to large-scale production. At this stage, it is in the initial stage of micro-sprinkler irrigation. At present, there are few studies on how to irrigate seedlings. Spraying water can prevent seedlings from being impacted by water, and research on how to spray water automatically

And in the existing semi-automatic research results, there is no equipment for detecting leaf surface moisture, but mainly use soil temperature, soil humidity, and air temperature as the irrigation control parameters of plants. These control methods have the following deficiencies: (1) cannot Accurately realize the adjustment of plant water demand; (2) It is easily disturbed by various factors such as temperature and salt accumulation in the soil; (3) The existing semi-automatic devices are not only expensive but also difficult to grasp the degree of sprinkler irrigation for different plants. Susceptible to impact damage to seedlings

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