Currently, when sharply increased environmental and psycho-emotional stress on the human body, it is becoming increasingly important healthy lifestyle and a balanced diet. An important role is given to green and spicy culture, as even a small amount of green consumption in the human diet has a positive effect. Lettuce grown, eaten and used as a medicinal plant by the ancient Egyptians, Romans and Greeks. In European countries, he appeared in the middle of the XVI century., And in Russia in the XVII century. Lettuce is rich in vitamins. They contain ascorbic acid, thiamine, riboflavin, niacin, rutin, carotene, 2.5-3.8% of sugars, carbohydrates, proteins, calcium, potassium, iron, sodium, phosphorus, amino acids, mannitol, asparagine and malic , citric acid, oxalic acid and succinic acid. The milky juice of lettuce has lactucin glucoside, soothing sleep and lowers blood pressure. Salad antisclerotic substance contributes to the formation of choline stimulates the excretion of cholesterol, thus preventing atherosclerosis.
By flow hydroponics it is based on the principle of growing plants in a nutrient solution with constant recirculation through the channels and pipes.
The advantage of this method is the minimum costs:
- the efficient use of fertilizers.
- prompt receipt of quality, environmentally friendly products
- costs heat
The choice of substrate and its preparation
For the cultivation of lettuce and greens in the flow hydroponics as a substrate using peat moss with agroperlitom or transitional peat agroperlitom.Peat must contain particles of medium and large size (15-20 mm) and does not contain a large number of small particles, with an ash content not exceeding 12%, the degree of decomposition should not exceed 15%, pH 4.2, contain 5-6% iron 0.1% chlorine on dry substance of peat.
- efficient use of fertilizers
- prompt receipt of quality, environmentally friendly products.
- the costs of heat