P. A. Postnikov, V. V. Popova, O. V. Vasina
Ural Federal Agricultural Scientific Center, Ural branch, Russian Academy of Sciences, ul. Belinskogo, 112 а, Ekaterinburg, 620142, Russian Federation
Abstract. In 2007–2020 in the Sverdlovsk region, we assessed the cultivation efficiency of meadow clover in three rotations of grain-grass crop rotation: barley + herbs, first-year clover, second-year clover, spring wheat, oats. The purpose of the research was to study the influence of meteorological conditions and nutritional background on the yield of clover and the biochemical composition of its dry mass. In the first year of clover use, the highest yield of green mass was formed in the years with an HTC above 1.7 units (in total for 2 hay cuttings it was 31.9–34.0 t/ha). The increase in yield was due to high productivity in the second cutting (13.7–17.1 t/ha). With moderate moisture content, the yield of green mass did not exceed 12.1 t/ha. In the second year of clover use, against the background of the use of crop fertilizers, we revealed a decrease in productivity by 1.6–7.8 t/ha, whereas this was not registered in the control. On average, over the years of research, the total yield of green mass for 2 cuttings did not depend much on the background nutrition; in most years, the yield of dry matter, fodder products and metabolizable energy were higher in the first cutting. Against the background of fertilizers, we registered a clear trend of increasing the yield of digestible protein and green clover mass in the first cutting, in relation to the control option, by 58–64 kg/ha in the first year of use and by 22–49 kg/ha in the second year of use. The fodder value of clover in terms of the accumulation of metabolic energy and fodder units in 1 kg of dry matter was hardly dependent on the year of use. Against the background of mineral fertilizers, the provision with digestible protein per 1 feed unit, in relation to the control when fertilizers were not used, increased by 10–23 g.
Keywords: meadow clover (Trifolium pratense); year of use; cutting; hydrothermal coefficient; yield; dry matter; feed units; digestible protein.
Author Details: P. A. Postnikov, Cand. Sc. (Agr.), leading research fellow (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); V. V. Popova, senior research fellow; O. V. Vasina, junior research fellow.
For citation: Postnikov PA, Popova VV, Vasina OV [Productivity and biochemical composition of meadow clover used for two years in grain-grass crop rotation]. Dostizheniya nauki i tekhniki APK. 2021;35(6):39-43. Russian. doi: 10.24411/0235-2451-2021-10607.