INFLUENCE OF NUTRITION OPTIMIZATION ON THE YIELD OF HYSSOPUS OFFICINALIS L. IN THE CONDITIONS OF THE SOUTHERN STEPPE OF UKRAINE
Abstract
Purpose. to determine the influence of nutrition optimization of Hyssopus officinalis L. plantations on crop yield in the Southern Steppe of Ukraine. Methods. Field and laboratory studies were carried out in accordance with modern requirements and standards of research in agronomy and agriculture. Results. On average, over the years of research, the use of mineral fertilizers in a dose of N90P90 provided the highest yield of green aboveground mass of medicinal hyssop plants. Thus, on average, according to the variants of foliar fertilization of plantations of medicinal hyssop in the first year of use, this variant produced 6.24 t/ha of green aboveground mass of plants, which exceeded the control variant of the experiment by 2.76 t/ha or 44.2%. When using the preparation Helafit combi, on average over the years of research and by the factor of the dose of mineral fertilizers, the yield of plants in the first year of use was 5.42 t/ha, which exceeded the variant without the use of foliar fertilization of plantations by 25.5%, respectively. The same trend was observed for the second and third years of planting. In the third year of plantation use, the plants of medicinal hyssop formed the highest yield of green aboveground mass. Thus, on average, 7.51 t/ha of green aboveground mass was obtained in the experimental variants, which exceeded the yield of medicinal hyssop plants in the first year of use by 2.63 t/ha or 35.0%, and in the second year of use by 0.67 t/ha or 8.9%. Conclusions. In the conditions of the Southern Steppe of Ukraine, when optimizing the nutrition of medicinal hyssop, especially in the third year of plantations, the yield of green aboveground mass of plants was the highest – 7.51 t/ha, which is more than the yield of plants of the first and second years of use by 0.67 – 2.63 t/ha. The use of combined use of mineral fertilizers at a dose of N90P90 and foliar fertilization with Helafit combi twice during the growing season provided the highest yield of medicinal hyssop regardless of the year of use of the plantations – 6.84 – 10.01 t/ha.
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