A kind of hydroponic lettuce nutrient solution and its preparation method and application
A technology for nutrient solution and lettuce, applied in application, fertilizer mixture, fertilization device, etc., can solve the problems of fluctuating crop health, water environment threat, water resource waste, etc., and achieve the effect of ensuring phosphorus demand, reducing production cost, and reducing investment.
Active Publication Date: 2018-04-10
NONGXIN TECH BEIJING CO LTD
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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
Method used
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Embodiment 1
[0045] The hydroponic lettuce nutrient solution is composed of the following ingredients: calcium nitrate 118mg / L, potassium nitrate 76mg / L, magnesium sulfate 123mg / L, potassium sulfate 65mg / L, chelated iron 20mg / L, boric acid 0.5mg / L, sulfuric acid Manganese 0.5mg / L, zinc sulfate 0.05mg / L, copper sulfate 0.02mg / L, ammonium molybdate 0.01mg / L and pH adjuster;
[0046] The pH value of the nutrient solution is 5.5, and the pH adjuster is formed by mixing 5% dilute nitric acid and 5% dilute phosphoric acid in a volume ratio of 2:1.
Embodiment 2
[0048] Compared with Example 1, the only difference is that the pH value of the nutrient solution is 6.0, and the pH adjuster is formed by mixing 4% dilute nitric acid and 6% dilute phosphoric acid in a volume ratio of 2:1.
Embodiment 3
[0050] Compared with Example 1, the only difference is that the pH value of the nutrient solution is 6.5, and the pH adjuster is formed by mixing 6% dilute nitric acid and 4% dilute phosphoric acid in a volume ratio of 2:1.
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The invention relates to a nutrient solution for hydroponic lettuce. The nutrient solution contains the following components at the following concentrations: 115-120 mg / L of calcium nitrate, 74-78 mg / L of potassium nitrate, 120-125 mg / L of magnesium sulfate, and 63-67 mg of potassium sulfate / L, chelated iron 18~22mg / L, boric acid 0.4~0.6mg / L, manganese sulfate 0.4~0.6mg / L, zinc sulfate 0.045~0.055mg / L, copper sulfate 0.015~0.025mg / L, ammonium molybdate 0.008-0.012 mg / L and a pH regulator; the pH value of the nutrient solution is 5.5-6.5, and the pH regulator consists of dilute nitric acid and dilute phosphoric acid. The culture solution provided by the invention balances the ratio of each element, and at the same time, the composition of the nutrient solution and pH regulation are considered comprehensively, and the yield of the lettuce and the utilization efficiency of the nutrient solution are improved while reducing the production cost.
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...
Claims
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IPC IPC(8): C05G3/00
Inventor 王利春郭文忠李银坤李友丽陈菲徐凡陈红
Owner NONGXIN TECH BEIJING CO LTD