Automatic spray irrigation frost prevention system and method for plants

Abstract

The invention discloses a plant automatic sprinkler irrigation frost prevention system and method, belonging to the field of agricultural meteorological disaster monitoring and control. Irrigation and anti-frost operations are extensive and control methods are simple, resulting in excessive use of water. In the present invention, after the water in the pond or the lake is pressurized by the water pump, it is sprayed upwards from the lower direction of the plant canopy through the nozzle; the wet bulb temperature higher than a certain threshold value of the critical freezing damage temperature of the plant is used as the set value, which is different from that of the plant planting in different temperature regions. After the wet bulb temperature is compared, the opening and closing of the water pump and the electromagnetic valve in each area are controlled, so as to realize the control of spray irrigation and frost prevention in each area respectively. The invention can realize automatic spray irrigation and anti-frost of plants, reduce water consumption, and is suitable for anti-frost of plants in areas with water source conditions.

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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