PL
Badano reakcję trzech krajowych odmian pszenicy ozimej na nawożenie azotem — 90 kg/ha, wnoszone w całości doglebowo oraz doglebowo — 50% i dolistnie — 50% dawki, na tle stosowania retardanta i fungicydu. Stwierdzono, że sposób stosowania azotu nie wpłynął na jego efektywność. Lepsze wykorzystanie azotu wystąpiło przy jego łącznym stosowaniu z retardantem i fungicydem. Z badanych odmian wysoko plonowała Liwilla oraz Gama, a znacznie im ustępowała Emika.
EN
In field experiments made on a degraded chernozem (in Experimental Farm Prusy near Krakow) the authors tested in the years 1986—1989 the response of three Polish cultivars of winter wheat (Gama, Emika, Liwilia) to nitrogen fertilization — 90 kg N per ha, applied through the soil as a whole or 50% through the soil and 50% by foliar spray. The effect of a growth retardant (Bercema CCC) and of a fungicide (Bayleton) were also investigated. Nitrogen in the form of urea was applied during foliar spray either separately or together with the growth retardant or the fungicide. The authors found that the method of applying nitrogen did not affect its effectiveness. A somewhat better utilization of nitrogen did, it is true, appear during its foliar application jointly with the retardant and the fungicide. A comparatively positive effect on the yield of wheat grain was obtained by the retardant and the fungicide applied in the control object i.e. without the nitrogen fertilization. There was a pronounced effect of the years of vegetation on the yield of wheat grain and its structure which was causcd by a different course of the weather in separate vegetation seasons. The cultivars Liwilia and in part also Gama yielded better as compared to Emika which was much less reproducible as to yields.