Effect of weather conditions, varieties and liquid leaf fertilizers containing bioactive components on sugar beet quantity and quality parameters
Pacuta, V.(Slovenska polnohospodarska univerzita, Nitra (Slovak Republic) | Feckova, J.Slovenska polnohospodarska univerzita, Nitra (Slovak Republic))
In the small-parcel experiment with four varieties of sugar beet on the locality nearby Nitra (south-western part of Slovakia) influence of variety and fertilization on the sugar beet root yield, digestion and polarized sugar yield was observed. The experiment was established on the medium heavy luvisol in unirrigated conditions. Locality occurs in warm and slightly dry region with continental type of weather. Four levels of fertilization were observed. Control level was fertilized with artificial NPK-fertilizers and cattle manure. Nutrients rates were calculated according the soil nutrients content on the expected root yield 50 t/ha . Other three levels of preparations Avit-35, Humix plus and Farohyd were added during the vegetation. These were considered to be the liquid fertilizers on the base of natural growth stimulators. Sugar beet was treated by the preparations in the stage of the 9-11 leaves (Avit-35, Humix plus, Farohyd) and right before full canopy (Humix plus, Farohyd). Two rhizomania sensitive sugar beet varieties (Fox, Zenith) and two rhizomania resistant (Monriz, Rizoma) were used in the experiment. The experimental locality is considered to be without rhizomania infection. BNYVV, if present, was not detected. Results were evaluated by multifactor analysis of variance and analysis of nested designs. From the results arises high significant influence of years weather conditions on all the observed parameters. At the soil conditions without BNYVV infection rhizomania resistant varieties reached comparable results to rhizomania sensitive varieties. Liquid fertilizers Avit-35 and Humix plus influenced positively root yield and polarized sugar yield. Influence of Farohyd did not reach the significance limit. Tested fertilizers negatively influenced digestion.
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