Annotation

The article presents research results on the study of a new complex mineral fertilizer Nitroammophoska-M. This mineral fertilizer consists of N – 9.0 %, Р2О5 – 18 %, K2O – 22 %. It is made on the basis of African phosphorites containing Р2О5 of various degrees of accessibility (water-soluble form, form soluble in formic and citric acid). These phosphorites contain microelements Cu, Zn, Mn, Mo, Ni, S, Fe and others. The fertilizer is made based on African phosphorites, which contain Р2О5 of different degrees of accessibility (water-soluble form, form absorbed in formic and citric acid). These phosphorites contain Cu, Zn, Mn, Mo, Ni, S, Fe, and others. Application of them makes a reclamation effect and eliminates the need for soil liming due to the presence of calcium and magnesium carbonates, and their alkaline reaction (pH 8.8) respectively. The research results showed a significant effect on the structure of the yielding capacity (number of seeds from one plant, seed weight from one plant, plant height, attachment of the lower bean) the lowest was in control (without fertilizers), the highest – in the variant of Nitroammophoska-M use at 4 c/ha. The yielding capacity of Mentor soybeans under the influence of the complex fertilizer Nitroammophoska-M varied and was at the level of 2.51–4.06 t/ha over the years of research within the experiment. It was noted that the lowest yielding capacity was in the control (without fertilizers), i.e. 2.51 t/ha, the maximum – on the variantof Nitroammophoska-M (4 c/ha) – 4.06 t/ha. The increase in yielding capacity of Mentor soybeans on the variant of Nitroammophoska-M (4 c/ha) was 1.55 t/ha, or 61.8 %. The highest laboratory germination was observed on the versions with fertilizer 4 c/ha and 5 c/ha, the lowest one – on the version without fertilization. In other versions of fertilization, this figure was 98 % (Table 3). We pointed out that the first tubers began to form in the phase of the third leaf of the crop. One noted their maximum number within the experiment in the variant where Nitroammophoska-M was applied at the rate of 4 c/ha: in the budding phase the total number and number of active tubers was 49.7 and 45.4 pieces/plant; in the phase of full blooming – 54.2 and 53.7 pieces/plant, and a gradual decline in the phase of full maturity to 28.1 and 14.7 pieces/plant.