Negative water pressure irrigation and fertilization system and control method

Abstract

The invention relates to the technical field of agricultural irrigation, and in particular relates to a negative water pressure irrigation and fertilization system and a control method. The negative water pressure irrigation and fertilization system comprises a water source, a fertilizer solution control device and a negative water pressure device, wherein the fertilizer solution control device comprises a fertilizer solution box, a display screen, a sensor and a surfing pump; the fertilizer solution box is communicated with the water source; the display screen is arranged out of the fertilizer solution box; the sensor and the surfing pump are respectively arranged in the fertilizer solution box; the negative water pressure device comprises a liquid storage bucket, a pressure control pipe, a gas collecting bottle and a plurality of ceramic plates; the liquid storage bucket is communicated with the fertilizer solution box; one end of the pressure control pipe is connected with the liquid storage bucket; the other end of the pressure control pipe is connected with the gas collecting bottle; and the gas collecting bottle is communicated with the plurality of ceramic plates. The negative water pressure irrigation and fertilization system is capable of simultaneously supplying moisture and nutrients, and supplying fertilizer solutions with different concentration according to the change of the growth period of the crop, and meets the integrated requirements of growth and development of crops on moisture and nutrient, so that high quality and high yield of the crop are realized.

Description

technical field [0001] The invention relates to the technical field of agricultural irrigation, in particular to a negative head irrigation and fertilization system and a control method. Background technique [0002] In recent years, my country's protected gardening industry has developed rapidly. In 2011, the protected gardening area exceeded 4 million square kilometers, ranking among the top in the world. Vegetables are the main cultivated crops in protected horticulture, and their area can account for 90% of the protected horticultural cultivation area. Reasonable water and fertilizer management is an important guarantee for the healthy growth and high-quality and high-yield of vegetables. However, the traditional fertilization method in my country is to apply 40% of the fertilizer amount as base fertilizer to the soil, and the remaining fertilizer is applied in the form of topdressing during the main growth period of vegetables. Due to the asynchrony of water and fertil...

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Problems solved by technology

The existing patent literature (ZL is 200510123974.X) discloses a negative head irrigation system, which simply realizes soil moisture management in the process of crop cultivation, and cannot effectively coordinate water and nutrients; in addition, the patent literature (ZL is 201310141504.0) Disclosed is an automatic irrigation decision-making system based on negative head water control and water supply, which only uses the negative head irrigation system to provide irrigation volume decision-making for the drip irrigation system, and is mainly used in soilless cultivation, which has certain limitations; The role of continuously controlling soil moisture content and maintaining a suitable and stable nutrient concentration in the rhizosphere soil

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