Planting system and planting method for controlling temperature of vegetable root

Abstract

The invention provides a planting system and a planting method for controlling the temperature of vegetable roots; wherein the system comprises a hydroponic planting nutrient solution pool and a nutrient solution sterilization temperature-control trough; the nutrient solution sterilization temperature-control trough is arranged beside the growing period hydroponic pool, is internally provided with a precise filter, a nutrient solution cooling group, a temperature sensor group and an electric heater heating group and is externally provided with a condensation compression unit that is connectedwith the nutrient solution cooling group; and a ultraviolet sterilization device is arranged above the nutrient solution sterilization temperature-control trough. The method comprises the following steps of: planting the hydroponic vegetable in the planting system for controlling the temperature of the vegetable roots; opening the nutrient solution valves arranged at two sides of the planting pool by the temperature-control planting system; pouring the nutrient solution into the nutrient solution sterilization temperature-control trough; filtering the solution by a precise filter; reducing the temperature when the solution flows by the nutrient solution cooling group subsequently or increasing the temperature by the electric heater heating group so as to lead the temperature of the nutrient solution to be kept at about 18 DEG C in summer and at about 22 DEG C in winter and lead the temperature of the vegetable plant to be reduced or increased, thus leading the vegetables to have the capability of resisting hot or cold weather.

Description

technical field [0001] The invention relates to vegetable planting technology, in particular to a method of using a temperature-controlled cultivation system to increase or decrease the temperature of the nutrient solution in a hydroponic cultivation pond, so that hydroponic vegetables can resist severe cold or heat, and make the nutrient solution of hydroponic vegetable roots The temperature control cultivation system and method for vegetable roots are kept within the range of 18°C ​​to 22°C which is optimal for vegetable growth throughout the whole growth cycle of vegetables. Background technique [0002] Traditional agricultural planting greenhouses or vegetable planting greenhouse facilities dedicated to heating in winter (regions with rich geothermal energy) cannot meet the needs of cooling in the hot summer season, so that when the ambient temperature in summer reaches a high temperature above 35°C, no matter whether it is ordinary cultivated land or traditional In gre...

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Problems solved by technology

[0024] The traditional greenhouse hydroponic planting method has the problem of discharging nutrient waste liquid, resulting in the disadvantage of eutrophication in rivers and lakes, while soil farming must consume a large amount of fresh water for irrigation. Today, fresh water resources are becoming more and more precious, and the output efficiency is relatively low. The high hydroponic planting method has to become one of the options for modern agricultural operators; what's more, the global climate has risen by 0.6°C in just 100 years in the 20th century due to the greenhouse effect. The computer model for simulating climate evolution has already calculated that by the end of this century, the average temperature of the earth will rise by more than 3.3°C. At that time, the melting of polar ice sheets will cause sea levels to rise, forcing coastal arable land to shrink or even disappear. Among the world's seven major rivers, except the Amazon In addition to the Congo River and the Congo River, the amount of water has decreased. In the past 50 years, some sections of the Yellow River in China have experienced 17 dry-flow phenomena; the result of global warming may cause more severe storms and heavy rains. The frequent occurrence of climate phenomena, for example, the ice storm that occurred in central China in early 2008 is one of the obvious examples. The storm should never have happened at this latitude in central China, and it was so vast and long-lasting. What's more, we don't know whether this ice storm is a special case or the norm in the future; short-term drastic changes in the weather are bound to disrupt the nourishment of rainwater. The regularity of precipitation in traditional agricultural areas seriously affects the operation of traditional agriculture and the harvest and price of agricultural products. Therefore, hydroponic planting methods with high production efficiency will become an unavoidable option for farmers to increase output in the future; however, hydroponic planting methods It can improve the shortcomings of reduced cultivated land, large consumption of fresh water for irrigation, and soil degradation caused by arbitrary application of chemical fertilizers, and can avoid the adverse effects of extreme weather on agricultural operations, but it will also generate arbitrary discharge of hydroponic waste nutrient solution, causing rivers and lakes The adverse consequences of eutrophication, especially vegetable nitrate nitrogen (NO 3 - —N) Concerns that it is too high to impede the health of consumers

The present invention aims at many defects of traditional farming, greenhouse hydroponics or organic planting methods that destroy the environment, waste fresh water resources, and cannot provide safe and hygienic vegetables, and propose innovative and effective improvement countermeasures

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