EFFICIENCY OF DIFFERENT RATES OF PRE-SOWING FERTILIZATION OF WINTER RAPE (BRASSICA NAPUS L.) IN THE CONDITIONS OF THE WESTERN FOREST-STEPPE ON LEACHED CHERNOZEM
DOI:
https://doi.org/10.37406/2706-9052-2025-1.9Keywords:
winter rape, pre-sowing fertilization, mineral fertilizer, yield, correlationAbstract
This article investigates the efficiency of different rates of pre-sowing fertilization of winter rape on leached chernozem in the conditions of the Western Forest-Steppe. The primary objective is to determine the optimal fertilization rates to increase the yield of winter rape (Brassica napus L.) and to assess the morpho-biological state of the plants throughout the growing season. The research was conducted in the Pidhaichsky district of the Ternopil region, a soil-climatic zone of the Western Forest- Steppe. The soil of the experimental plots is leached chernozem, deep, moderately humus-rich, heavy loam. This soil type is typical for the region, interspersed with podzolic and typical chernozems. Sowing was carried out using the Horsch Focus 7 MT grain seeder complex with simultaneous application of pre-sowing granular complex fertilizer. The same cultivation technology was used for all studied variants, adhering to the single difference factor condition. The hybrid used was Trezor. The preceding crop was winter wheat, with no prior soil tillage before sowing. Linear dependencies between the number of aborted pods and the number of formed pods, as well as between the root neck diameter and the number of formed pods, were also established. The study results showed a significant impact of pre-sowing fertilization rates on the yield of winter rape, with high correlation coefficients between the morphological characteristics of rape plants. The results indicated a close relationship between seed yield and fertilization level. At the same time, the results suggest the presence of a limiting factor in the studied soils, as well as significant soil reserves of nutrients. Optimal pre-sowing fertilization rates for winter rape ensure high seed yield. The proposed fertilization rates allow for stable agrobiocenosis development and high winter rape productivity in the conditions of the Western Forest-Steppe on leached chernozem.
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