Control of the concentration of the macroelement phosphorus in the substrate when growing tomatoes in protected soil conditions

Although most tomatoes are grown in open ground, their cultivation glass greenhouses or tunnel-typegreenhouses covered with plastic film is becoming more common to supply local markets fresh fruit. In closed soil, mainly tall varieties of grown. They make it possible use the area as efficiently and get rich harvests. Tomatoes can be stored for 11 months, unlike those ground. usually harvested unripe ripen during transportation on store shelves. Different types tend have a longer shelf life, better taste higher market value than field. Usually, plants attached supports single wire, while extra side shoots (stepchildren) removed so that only one stem remains. The height tomato bushes gradually reduced convenience immediately after ripening first bunches tomatoes. Shoots inflorescences increase length bush, number fruits weight order meet needs market. Taste, color, shape texture extremely important criteria evaluating quality Also, must clean contain no signs decay disease. Fresh should uniform shape, symmetry size. bright not green shoulders, spots characteristic immaturity. High concentrations carbon dioxide (600–1000 ppm) maintained improve process photosynthesis, growth rate yield. This practice very low yield regions intensive agricultural production systems. planting soil tunnel-type still quite common, intensive-type green-house substrates such mineral wool. Fertigation provides adequate nutrient eliminates factors associated heavy characteristics difficult control. Growing requires significant amount water. To feed tomatoes, producers also need take into account mass degree solubility fertilizers Some elements compounds present irrigation water affect plants, which why there control level. paper investigates influence concentration macroelement phosphorus wool substrate development Rosaletta (pink) crop period fruiting protected conditions. It was established photoelectrocolorimetric method determining content hoods sensitive, simple recommended serial analyses. determined average (50.0 mg/l) turned out required growing fruiting. Controlling allows you significantly prevent diseases obtain high-quality crops.