Water and fertilizer system suitable for planting of vegetables and fruits in agricultural greenhouse and control method

Abstract

The invention provides a water and fertilizer system suitable for the planting of vegetables and fruits in an agricultural greenhouse. The water and fertilizer system comprises a fertilizer mixing tank, a circulation pump, a water and fertilizer integration machine, a fertilizer bucket, an acid liquid bucket, an irrigation pump and a control circuit, wherein an upper limit floating ball switch anda lower limit floating ball switch are arranged in the fertilizer mixing tank; the fertilizer mixing tank is communicated with a water inlet of the water and fertilizer integration machine through the circulation pump; fertilizer suction electromagnetic valves are arranged on pipelines for communicating the fertilizer bucket, the acid liquid bucket and the water and fertilizer integration machine; an EC (electrical conductivity) sensor and a pH (potential of hydrogen) sensor are arranged on a water return pipe. A fertilizer applying method of the invention comprises the following steps of (a)setting an irrigation amount and a fertilizer applying amount; (b) calculating ion concentration and injection times; (c) controlling a water injection process; (d) controlling a fertilizer mixing process; (e) controlling an irrigation process; (7) judging the end of the irrigation. The water and fertilizer system and the water and fertilizer system method have the advantages that the irrigationand fertilizer applying operations on a planting area are realized; the problem of waste of water resource due to existing submerging irrigation and flooding irrigation is solved, and fertilizer can be scientifically and reasonably applied according to production requirements of crops.

Description

technical field [0001] The present invention relates to a water and fertilizer system and a control method, more specifically, to a water and fertilizer system and a control method for growing vegetables and fruits in an agricultural greenhouse. Background technique [0002] The construction area of ​​facility agriculture in my country has become the largest in the world. Although the scale is huge, the variety of facility agriculture in my country is single. Solar greenhouses and single greenhouses are the main varieties of facility agriculture in my country, especially in the north where light energy is relatively abundant. In the form of a single roof, the environmental controllability is relatively low, and the ability to resist natural disasters is relatively weak. The single variety of facility agriculture has caused my country's agricultural development level to lag far behind that of agricultural developed countries, especially the backwardness of agricultural equipme...

AI Technical Summary

Problems solved by technology

my country is one of the most water-scarce countries in the world. However, the annual agricultural water consumption accounts for about 70% of the national water consumption. Irrigation, flood irrigation and other modes, the water efficiency is extremely low

[0003] my country's annual chemical fertilizer use accounts for more than 1 / 3 of the world's total. At present, my country's fertilization mode is still mainly extensive, and the concentration ratio of water and fertilizer is ignored in the fertigation process, which makes the absorption rate of crops to fertilizers low, causing a large number of waste of water resources and labor

Due to the low control accuracy, the traditional water and fertilizer controller can only realize simple automatic control, but cannot realize the fine management of water and fertilizer

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