Influence of some leaf fertilizers and the growth regulator Amalgerol on winter oilseed rape production
Milena Radevska • Minka Koleva
Field Crops Institute – Chirpan, 6200, Chirpan, Bulgaria
Резюме
The study was conducted in the period 2011-2014 in the ecsperimental field of of Field Crops Institute – Chirpan on vertisol type soil. A two-factor field experiment, based on the block method, was performed in 4 repetitions, with a plot size of 20 m2. Factor A included the three years of the study. Factor B included 7 variants: 1. Untreated weed control; 2. Economic control – with out foliar fertilizers and growth regulator; 3. Amalgerol - 3 l/ha + Rapsin - 2 l/ha; 4. Amalgerol - 4 l/ha + Rapsin - 2 l/ha; 5. Amalgerol - 5 l/ha + Rapsin - 2 l/ha; 6. Amalgerol - 3 l/ha + Riza 25 EB - 500 ml/ha + Bo-La - 1 l/ha; 7. Amalgerol - 3 l/ha + Riza 25 EB - 500 ml/ha + Sulfur Hedland - 5 l/ha. The highest seed yield was obtained with the combined use of Amalgerol at a dose of 4 l/ha with the Rapsin foliar fertilizer at a dose of 2 l/ha. Of the combinations tested, the most unstableinterms of years was found for Amalgerol + Riza + Bo-La and Amalgerol +Riza + Sulfur Hedland. From the point of view of winter oilseed rape Brassica napus L.) growing technology, the most valuable proved to be the combinations of the Amalgerol growth stimulator with the Rapsin foliar fertilizer. They combined high values of seed yield and high stability of this indicator over the years.
Key words: Winter oilseed rape, Foliar fertilizers, Growth regulator, Seedyield, Structural elements of yield, Stability.
