Effect of fertilizers on the seasonal dy-namics of nutrient elements in the root zone of generative cranberry plants in conditions of depleted high-moor peat-lands

The results of the comparative study of the seasonal dynamics of available nitrogen, phosphorus and potassium compounds in the root zone of generative cranberry plants within the framework of field experiments with the mineral fertilizer Basacot Plus 6 (N₁₅P₈K₁₂ kg/ha a. i.) and domestic biological fertilizers – nitrogen-fixing and phosphate-mobilizing microbial MaKloR in concentrations of 5 and 10 %, as well as an organo-mineral fertilizer Ecohum complex on depleted high-moor peatlands in the central and northern agroclimatic zones of the Republic are presented. In the first case, a certain similarity in the seasonal course of the accumulation in the substrate of ammonium nitrogen and mobile phosphorus, as well as nitrate nitrogen and exchangeable potassium, was observed, due to the synergistic nature of their consumption with root nutrition and the biological characteristics of the development of the experimental plants, while in the second case a similar synergy was found for available phosphorus and potassium compounds. It was shown that the configuration of the cumulative curves of nutrients in the peat substrate was mainly characterized by the dominance of downward trends towards the end of the growing season and was determined by the type of fertilizers used, the geographical location of the study area, the genotype of the cultivars and the stage of their seasonal development.

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