Hydroponic nutrient solution for lettuce, preparation method and culture method of lettuce

Abstract

The invention discloses a hydroponic nutrient solution for lettuce, a preparation method and a culture method of the lettuce. The hydroponic nutrient solution is prepared from the following components in parts by mass: 500 to 550 parts of calcium nitrate tetrahydrate, 470 to 500 parts of potassium nitrate, 5 to 10 parts of chelated iron, 30 to 40 parts of monopotassium phosphate, 22 to 32 parts of ammonium dihydrogen phosphate, 100 to 140 parts of medicinal magnesium sulfate, and borax, manganese sulfate, zinc sulfate, copper sulfate and sodium molybdate which account for less than 3 parts in total, and the concentration of the calcium nitrate tetrahydrate is 240 to 840 mg / L. The proportion of nitrate nitrogen in the hydroponic nutrient solution is far higher than that of ammonium nitrogen, the proportion of all microelements is scientific, the hydroponic nutrient solution is suitable for growth of green vegetables such as lettuce, and the obtained lettuce has the advantages of being low in burning heart rate, high in yield and high in quality.

Description

technical field [0001] The invention relates to the technical field of vegetable cultivation, more specifically, to a hydroponic nutrient solution for lettuce, a preparation method and a lettuce cultivation method. Background technique [0002] Lettuce has the characteristics of short growth period, easy management, high yield and high nutritional value. It also has the effects of lowering blood pressure, anti-aging and preventing heart rhythm disorders. Lettuce is a raw vegetable and has high requirements for clean quality. Lettuce cultivation is suitable for soilless cultivation. Because it overcomes various restrictions on land, expands the space for agricultural production, and avoids various pathogens that are easily carried by soil cultivation, it is the most widely cultivated vegetable for plant factories. At present, whether it is field cultivation or factory soilless cultivation, lettuce is facing the problem of heartburn. The researchers proposed to reduce the hea...

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Problems solved by technology

The researchers proposed to reduce the heartburn rate by adjusting the facility environment, such as wind speed, humidity, light environment and nutrient solution, etc., but after the experiment, no good results were achieved, and the operation was cumbersome

At present, the nutrient solution used in the production of lettuce is mostly a general formula for common vegetables on the market, which is not targeted, and the heartburn problem still cannot be solved, which seriously affects the yield and quality of lettuce

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