ВЛИЯНИЕ ВИДА МИНЕРАЛЬНЫХ УДОБРЕНИЙ НА БИОМЕТРИЧЕСКИЕ И БИОХИМИЧЕСКИЕ ПОКАЗАТЕЛИ САЛАТА ЛИСТОВОГО В ЗАЩИЩЁННОМ ГРУНТЕ

Abstract

The work is devoted to the fertilization of vegetable crops. In the conditions of the vegetation ex-periment, a different ratio of lettuce plants to mineral fertilizers and micro fertilizers was estab-lished. The greatest effect in increasing the aboveground mass of lettuce was obtained with the addition of potassium, nitrogen, phosphorus, copper, boron and manganese. The introduction of ammonium nitrate into the protected soil during the cultivation of lettuce led to an increase in aboveground biomass, height and area of plant leaves. Fertilization of lettuce with silvinite led to an increase in the aboveground mass, leaf area, an increase in the water-holding capacity of the leaves and an increase in the level of soluble solids in the juice. When a simple superphosphate was introduced into the soil, the aboveground mass of lettuce, the water-holding capacity of the leaves, the content of organic acids and dry soluble substances in the juice increased. Liming the soil with chalk was a stress factor for plants, increasing only the level of ascorbic acid. The intro-duction of copper sulfate, boric acid and potassium permanganate into the soil under the salad in-creased the aboveground mass, the content of organic acids, soluble solids in the juice. The intro-duction of 7-water magnesium sulfate into the soil increased the content of chloro-phyll A, B and the sum of all pigments in lettuce leaves. The most important mineral elements for lettuce were nitrogen, phosphorus, potassium, boron, copper, manganese and magnesium.