Automatic spray irrigation frost prevention system and method for plants

Abstract

The invention discloses an automatic spray irrigation frost prevention system and method for plants, belongs to the field of agro-meteorological disaster monitoring and control, and solves the problem of excessive water utilization caused by an excessive operating mode and a simple control mode of irrigation frost prevention. The method comprises the steps as follows: water in a pond or a lake is upwards sprayed in the lower direction of plant canopy by a nozzle after pressurized by a water pump; and a wet bulb temperature higher than a critical plant freeze injury temperature by a certain threshold is set as a set value, after the set value is compared with wet bulb temperatures of areas at different planting temperatures, switching on and switching off of the water pump and electromagnetic valves in areas are controlled, so that the spray irrigation frost prevention in the areas is controlled respectively. With the adoption of the automatic spray irrigation frost prevention system and method for plants, automatic spray irrigation frost prevention of plants can be realized, the water utilization amount is reduced, and accordingly, the automatic spray irrigation frost prevention system and method are suitable for plant frost prevention of areas with the water source condition.

Description

technical field [0001] The invention relates to the field of monitoring and control of agricultural meteorological disasters, in particular to a plant automatic sprinkler irrigation and anti-frost technology. Background technique [0002] Early spring and late frost damage can cause serious damage to plant growth and development. Among the existing anti-frost measures, flood irrigation is more commonly used. It increases the soil moisture, reduces the porosity, increases the heat capacity and thermal conductivity of the soil, and can increase the temperature of the orchard to a certain extent. waterlogging. In addition, flood irrigation is likely to form surface runoff, causing soil nutrient loss and affecting plant growth. [0003] Japanese patents JPH01291729 and JPH06225650 respectively disclose methods and devices for water spraying and anti-frost for tea gardens and orchards. The principle is: when the temperature is 0°C, 1g of water releases 80cal latent heat when i...

AI Technical Summary

Problems solved by technology

It increases the soil moisture, reduces the porosity, increases the heat capacity and thermal conductivity of the soil, and can increase the temperature of the orchard to a certain extent. waterlogging

In addition, flood irrigation is easy to form surface runoff, causing soil nutrient loss and affecting plant growth

[0003] Japanese patents JPH01291729 and JPH06225650 respectively disclose methods and devices for water spraying and anti-frost for tea gardens and orchards. The principle is: when the temperature is 0°C, 1g of water releases 80cal latent heat when it solidifies and freezes, so it is sprayed on the plants When the water freezes on the surface of the plant, the latent heat released can keep the temperature of the plant above the critical freezing damage temperature, so as to achieve the purpose of frost protection; however, the positions of the disclosed nozzles are all above the plant canopy, and when spraying, use A large number of water droplets remain in the open space without plants, resulting in a waste of water resources

The Chinese patent with application number 201110333226.X discloses a method for preventing frost in tea gardens during Spring Festival with mist spray irrigation equipment. Calorie requirements

In addition, the water spray and mist frost protection methods disclosed above do not involve the control technology during use. If used improperly, it will aggravate the frost damage.

[0004] Japanese patent JP2006238767 discloses a frost damage prevention device, which uses the lowest temperature in all areas of frost protection as the control condition for starting the system, which may cause water spraying and frost protection in areas where frost damage has not occurred, thereby causing water damage. waste of resources

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