Published in Scientific Papers. Series A. Agronomy, Vol. LXII, Issue 1
Written by Zhivko TODOROV, Radka IVANOVA
The experiment is conducted in the Experimental Base of the Department of Plant Growing at Agricultural University of Plovdiv in the period 2012-2015. The experiment is set in block mode, in 4 repetitions, with cultivated plot size of 20 m2, with winter rapeseed – the Visby hybrid. The aim of the experiment is to establish rapeseed yield treated with the following leaf fertilizers: Lactofol B - 4000 ml/ha, Litovit® - 2000 g/ha, and Fertiactyl Starter - 3000 ml/ha, and one untreated control. Rapeseed is sown during the following sowing dates - 1-10.IX, 1-10.X, 10-20.X, 20-30.X. The leaf fertilization is carried out in the 2-4 leaf stages for the first two sowing periods and in 1-2 leaf stages for the second two sowing periods. The studied leaf fertilizers have positively influenced the yield of rapeseed. The highest grain yield was recorded in 2014, and the lowest in 2013. Both during the three-years period and averagely for the study period, the highest grain yield for the different sowing periods was obtained from variants treated with Fertiactyl Starter - 3000 ml/ha.
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