Influence of sowing time on the productivity of white lupin in the Kurgan region

The results of a three-year field experiment to study the effect of three sowing periods on crop structure, biometric indicators and productivity of white lupine varieties of Dega and Gamma cultivated for grain are given. The experiment was conducted in 2015-2017 on leached chernozem of the experimental field of the Kurgan State Agricultural Academy in the forest-steppe zone of the Kurgan Region. The first term of sowing corresponded to the time of the onset of physical maturity of the soil (end of April - the first decade of May), the subsequent periods - in 6-8 days. The full ripeness phase was not achieved only in 2015 with the third sowing period. The best time for sowing over the years of research for both varieties was the first period — the yield of lupine grain in this variant varied from 2.5 to 14.9 t / ha.