Nutrient solution for hydroponic lettuce and preparation method and application of nutrient solution

Abstract

The invention relates to nutrient solution for hydroponic lettuce. The nutrient solution comprises the following components in concentrations as follows: 115 to 120mg / L of calcium nitrate, 74 to 78mg / L of potassium nitrate, 120 to 125mg / L of magnesium sulfate, 63 to 67mg / L of potassium sulphate, 18 to 22mg / L of chelated iron, 0.4 to 0.6mg / L of boric acid, 0.4 to 0.6mg / L of manganese sulfate, 0.045 to 0.055mg / L of zinc sulfate, 0.015 to 0.025mg / L of copper sulfate, 0.008 to 0.012mg / L of ammonium molybdate and a pH value regulator; the pH value of the nutrient solution is 5.5 to 6.5, and the pH value regulator consists of dilute nitric acid and dilute phosphoric acid. According to the nutrient solution provided by the invention, the proportion of all the elements is balanced; meanwhile, by comprehensively considering the composition of the nutrient solution and pH regulation, while the production cost is reduced, the yield of the lettuce and the utilization efficiency of the nutrient solution are improved.

Description

technical field [0001] The invention relates to the technical field of soilless cultivation of facility agriculture, in particular to a hydroponic lettuce nutrient solution and a preparation and application method thereof. Background technique [0002] Hydroponics uses nutrient solution as the cultivation medium, which is clean, cheap and easy to control, and has become one of the preferred cultivation modes for factory vegetable production. However, under the condition of hydroponics, the roots of the crops are directly immersed in the nutrient solution, and since the buffering property of the nutrient solution is far weaker than that of the soil, the fluctuation of its components and characteristics will have adverse effects on the health of the crops in a short period of time. influences. Although the above-mentioned effects can be avoided by replacing the nutrient solution, the replacement of the nutrient solution will cause a great waste of water resources, and the dis...

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Problems solved by technology

However, under the condition of hydroponics, the roots of the crops are directly immersed in the nutrient solution, and since the buffering property of the nutrient solution is far weaker than that of the soil, the fluctuation of its components and characteristics will have adverse effects on the health of the crops in a short period of time. influences

Although the above-mentioned effects can be avoided by replacing the nutrient solution, the replacement of the nutrient solution will cause a great waste of water resources, and the discharge of the residual inorganic nitrogen and phosphorus in the nutrient solution waste liquid into the environment will also affect the local water environment. pose a potential threat

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