Precision irrigation and fertilization system

Abstract

The invention discloses a precise irrigation and fertilization system. The system comprises a plurality of proportional fertilization pumps, a plurality of stock solution tanks, a pH meter, an EC tacheometer and a mixing tank, wherein the plurality of proportional fertilization pumps are sequentially communicated and each proportional fertilization pump is communicated with the stock solution tanks, respectively; an outlet of the proportional fertilization pump at the tail end is communicated with the mixing tank; the pH meter and the EC tacheometer are arranged on a communicated pipeline; a liquid outlet is formed in the bottom of the mixing tank and communicated with a water pump. The number of stock solution tanks can be flexibly increased or decreased according to needs, only the corresponding number of proportional fertilization pumps is added, fertilizer raw materials can be respectively placed in different stock solution tanks according to needs so as to precisely control various nutrient elements respectively. In a certain flow range, the fertilizer absorbing flow rate of the proportional fertilization pumps is only in direct proportion to the water flow rate flowing through the proportional fertilization pumps and is not affected by the water level height of the stock solution tanks. The problem of inaccurate fertilizer absorbing quantity of a venturi device when a water level difference of the stock solution tanks is large is avoided.

Description

technical field [0001] The invention relates to a precision irrigation and fertilization system, which belongs to the technical field of crop irrigation and fertilization. Background technique [0002] For substrate cultivation or hydroponic crops, EC, pH and fertilizer nutrient ratio are the three major elements of nutrient solution. EC is electrical conductivity, which represents the conductivity of ions in the solution. The more movable charged ions, the smaller the resistance and the stronger the conductivity, so the higher the EC value. If the ion concentration of the nutrient solution is too high, it will cause the root system of the crop to lose water, the light one will cause the yield and quality of the crop to decline, and the severe one will cause the fallen leaves to wither or even die. If the ion concentration of the nutrient solution is too low, the crops will not absorb enough nutrients, which will lead to weak growth and reduced production. Each crop has it...

AI Technical Summary

Problems solved by technology

[0006] 2. The concentration control of nutrient solution is limited

There are the following problems: (1) When the water levels in different stock solution tanks and acid tanks are quite different, the fertilizer absorption speed control of Venturi is not accurate

[0008] 3. Higher cost

However, the domestic production area is generally small, and the production scale of farmers is mostly from one mu to several mu, and the input cost of irrigation and fertilization machines per unit area is very high

Take Priva’s NutriFitHX irrigation and fertigation machine as an example, the current price is about RMB 120,000, which is difficult for ordinary farmers to accept

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