A large-scale soilless cultivation system for crops and a nutrient solution injection and return method

Abstract

The invention discloses a large-scale soilless cultivation system for crops and a nutrient solution injection and liquid return method. The soil cultivation system includes a fixed support, a cultivation device, a liquid injection and liquid return device and a positioning device; a plurality of cultivation devices are evenly distributed up and down, left and right The injection head device in the liquid injection and liquid return device is installed on the positioning device, and the injection head device can inject liquid and return to a row of horizontal culture devices on the fixed support through the lateral moving parts of the positioning device. Liquid operation, through the longitudinal moving parts of the positioning device, the injection head device can perform liquid injection and liquid return operations on the vertical culture device on the fixed support. The invention realizes the effects of unmanned cultivation, large-scale planting and zero discharge of nutrient solution for various crops.

Description

technical field [0001] The invention relates to the field of soilless cultivation, in particular to a large-scale crop soilless cultivation system and a nutrient solution injection and liquid return method. Background technique [0002] Soilless cultivation refers to a cultivation method in which water, peat or forest humus, vermiculite and other media are used as the substrate for plant roots to fix plants, and plant roots can directly contact the nutrient solution. [0003] Existing soilless cultivation techniques mostly use hydroponics, and the roots of many plants are not suitable for immersing in nutrient solution all the time, which will cause root rot and lack of oxygen, which will seriously affect plant growth and even cause problems such as death. [0004] However, in some small-scale soilless cultivation, regular replacement of nutrient solution can be carried out manually. For large-scale soilless cultivation, regular replacement of nutrient solution will undoubte...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing soilless cultivation techniques use hydroponics, but the roots of many plants are not suitable for soaking in the nutrient solution all the time, which will cause rotten roots, hypoxia and other phenomena, which will seriously affect the growth of plants and even cause problems such as death

[0004] However, in some small-scale soilless cultivation, the regular replacement of the nutrient solution can be performed manually. For large-scale soilless cultivation, the regular replacement of the nutrient solution will undoubtedly greatly increase the amount of labor.

[0005] Of course, some large-scale soilless cultivation nutrient solution containers use S-shaped pipes, so that the nutrient solution can be replaced quickly, but each replacement requires a large amount of nutrient solution, which undoubtedly increases the cost.

However, in order to avoid the lack of oxygen in the plant roots, a large amount of nutrient solution is wasted after frequent replacement of the nutrient solution, because most of the nutrient solution can still be used

[0006] Some large-scale soilless cultivation uses the form of spraying to spray the nutrient solution. This method can avoid the phenomenon of plant root rot. However, the spraying form will inevitably spray the nutrient solution to the surrounding environment of the plant, and the plants are sprayed frequently. This undoubtedly causes a lot of waste of a large nutrient solution; moreover, the pH of the nutrient solution directly affects the state, transformation and effectiveness of nutrients in the nutrient solution

When adjusting the pH value, first dilute strong acid and strong alkali with water, and then add it dropwise to the nutrient solution. Therefore, the nutrient solution sprayed to the outside will also cause certain environmental pollution.

[0007] In actual cultivation, because different plants require different nutrient solutions, one operation room generally cultivates one type of plant, which makes the crops too single

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