THE EFFECT AND POST EFFECT OF ORGANO-MINERAL FERTILIZERS AND GROWTH PROMOTERS ON QUANTITY AND QUALITY OF POTATO YIELD CULTIVATED IN POST-FOREST BROWN SOILS

Abstract

The article presents the results of the studies on the changes in the quantity and quality indicators of the potato crop under the effect and post-effect of the application of organo-mineral fertilizers and growth promoters in post-forest brown soils, in potato fields grown in drought conditions. The results of field experiments and laboratory studies showed that equivalent doses of organomix and mineral fertilizers in potato fields had an equal effect on increasing potato yields. In the variants receiving organomix, each ton provided an additional yield of 18-20 c/ha per year of exposure and 3-3.5 c/ha per year of subsequent exposure, while equivalent doses of mineral fertilizers had no reverse effect compared to the tester. Despite the one-time and fractional application of equivalent doses of organic mixes and mineral fertilizers, as well as in the exposure and post-exposure versions of biofluid, the nitrate content increased compared to the tester (31-114 mg/kg on average during exposure years, 3-15 mg/kg on average during research years). however, their quantities in the potato harvest are within the limits of the MAD (the marginal allowable density).