Sojas šķirņu ‘Lajma’ un ‘Laulema’ raža Viļānos 2018.–2020. gadā | Yield of soyabean varieties ‘Lajma’ and ‘Laulema’ in Vilani 2018–2020
2021
Justs, A., Latgale Agricultural Research Centre, Vilani, Vilani Municipality (Latvia);Institute of Agricultural Resources and Economics, Priekuli, Priekuli Parish, Priekuli Municipality (Latvia) | Zute, S., Institute of Agricultural Resources and Economics, Priekuli, Priekuli Parish, Priekuli Municipality (Latvia) | Stramkale, V., Latgale Agricultural Research Centre, Vilani, Vilani Municipality (Latvia);Institute of Agricultural Resources and Economics, Priekuli, Priekuli Parish, Priekuli Municipality (Latvia) | Stramkalis, A., Latgale Agricultural Research Centre, Vilani, Vilani Municipality (Latvia);Institute of Agricultural Resources and Economics, Priekuli, Priekuli Parish, Priekuli Municipality (Latvia)
In recent years, farmers in Europe and also in Latvia have become increasingly interested in the production of local high protein raw materials. This increases interest in growing soybean (Glycine max) in Latvia in order to reduce the dependence of the livestock sector on the external market. Currently there are no agronomically and economically justified developments in soya cultivation in Latvia. The aim of this study was to determine the changes of soybean varieties seed yield and parameters of productivity under different growing and meteorological conditions (Justs, 2020). The research was conducted in 2018, 2019 and 2020 at Agricultural Research centre Latgale in Vilani (56˚34‘10''N, 26˚58'01''E). The meteorological conditions in 2018 were suitable for soybean cultivation, but in 2019 and 2020 they prolonged the vegetation period, which delayed the ripening of later maturing variety ‘Lajma’. The soybean seed yield was significantly affected by the variety (p is less than 0.001) and the sowing rate (p is less than 0.01) in both years of the study, as well as the weather conditions in the specific year affecting the yield significantly (p = 0.012). In 2018 ‘Lajma’ was a more productive variety: 2.79 t haE−1 (‘Laulema’: 2.03 t haE−1) and in 2019 the situation was the opposite with ‘Laulema’ being the most productive variety – 1.93 t haE−1 (‘Lajma’: 1.18 t haE−1). In 2020 the variety 'Laulema' was the most productive – 2.44 t haE−1 (‘Lajma’: 1.94 t haE−1). The sowing rate of 60 germinable seeds per square meter ensured a significantly higher seed yield in all years.
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