GROWTH AND DEVELOPMENT OF POTATO PLANTS UNDER DIFFERENT FERTILIZER SYSTEMS

The article discusses the results of the influence of fertilization options: manure, 50 t/ha and mineral fertilizers with foliar application of biological preparations Trichodermin, Haupsin, Azoter F® on the growth and development of potato plants. The study found that potatoes responded positively to fertilization, so the growing season of potatoes in the fertilizer variant N50P40K70 increased by 6 days. The use of biological preparations, in particular Azoter F®, contributed to the growth of vegetation under different fertilization options for 9-10 days. The area of the leaf surface of potatoes was best formed in the fertilizer variant N50P40K70. Thus, in the phase of full germination, it increased by 1-3% depending on the fertilizer and biological products, and in the flowering phase, the leaf surface area increased by 40-47% compared to the variant without fertilizer. The highest photosynthetic potential of potatoes is formed in the variant with the use of manure, where it was 916 thousand m2/ha *day. The foliar application of biological preparations Haupsin and Azoter F® under this fertilization option was the most effective, the photosynthetic potential indicators varied within 1009 and 1032 thousand m2/ha *day.