PREPARATIONS THAT STIMULATE EGGPLANT GROWTH AND CROP YIELD WITHOUT SIGNIFICANT EXCESS IN ACCUMULATION OF NITRATES IN THE CLIMATES OF PRIAMURYE
The article substantiates the necessity and opportunity of eggplant growing in Priamurye, presents the importance of profound study of stimulating preparations used for eggplant growing in concrete soil and climate environment. Investigation method - field experiment. The experiment scheme comprised the variants as follows: 1. Control - plants without treatment; 2. Control - water spraying; 3. Agricola; 4. Sodium humate; 5. Zircon. It was found out that under weather conditions of the year 2015 the use of preparations sodium humate, zircon, and Agricola accelerated growth and development of plants. Average fruit weight grew correspondently by 15, 22,6, 29,6% in comparison with control. In year 2016 the growth of the fruit slowed down considerably, and in case of temperature perturbation of nearly 14°C it ceased at all. All the preparations being studied during the experiment proved to be inefficient. The maximal crop yield of matured eggplant fruit was developing in year 2015 when preparation Agricola was used - 28,7 t/ha. On the average for the two years the best results were achieved when the plants were treated with Agricola and zircon - the crop yield amounted to 20,7 t/ha. In the years with different weather conditions in Priamurye the biostimulants studied by us did not contribute to accumulation of maximum permissible concentration of nitrates in eggplants at low humidity in year 2015 as well as at high humidity in year 2016. At the permissible level in eggplant fruit 300 mg/kg their maximal concentration in case of plant treatment with sodium humate on average for two years amounted to 61,1±4,9 mg/kg of raw product.