The role of magnesium ions for the growth and development of tomatoes when growing in protected soil conditions

Tomato is one of the main and popular vegetable crops not only in Ukraine, but throughout world. According to Food Agricultural Organization (FAO), tomatoes occupy first place world terms cultivated areas among all vegetables — more than 4 million hectares. In about 93,000 hectares 24% total area under are devoted this culture. With advent high-intensity technologies with use drip irrigation systems, tomato yields 120–140 t/ha open ground, 50 kg/m2 sheltered became real. Nowadays, method small-volume hydroponics becoming widespread greenhouse farms. As a substrate, special materials used mineral wool, coconut, peat, etc. The selected substrate functions as medium for roots, feeding carried out by supplying fertilizer solution. When growing on it necessary dose fertilizers very accurately provide plants sufficient amount nutrients. paper investigates effect concentration macroelement magnesium wool growth development Campari (cocktail) culture protected soil conditions. It was established that photoelectrocolorimetric determining content hoods quite sensitive, simple, recommended serial analyses. determined salts (72.0 mg/l) turned be insufficient period mass fruiting. Controlling allows you significantly prevent chlorosis obtain high-quality crops.