摘要：The research results are based on a three-year field experiment conducted in the Agricultural Experimental Station belonging to the University of Natural Sciences and Humanities in Siedlce (52o03oN; 22o3oE). The purpose of the study was to identify the impact of the microbiological preparation UGmax on the content of crude and true protein in edible potato tubers. The experiment was established according to randomized split-plot method, in three replications. The examined factors included: I - cultivar, II - way of application of the microbiological preparation UGmax. The assessment covered two medium early cultivars of potato (Satina and Tajfun) and five methods of application of the UGmax preparation, differing in doses and timing of application. Crude and true protein content in potato tubers was higher on all objects, on which the microbiological preparation UGmax was applied, regardless of dose and timing of application, in comparison with a control object, where the UGmax preparation was not used. Chemical analyses indicated that more crude and true protein was accumulated by the Satina cultivar than the Tajfun cultivar. Crude and true protein content in potato tubers was determined by weather factors in the period of conduct of the experiment. The largest quantity of the concerned components was accumulated by tubers in the vegetation period of 2009, when, in July, low quantity of precipitation (26.4 mm) and optimal air temperature was recorded for growth and development of potato plants (19.4oC).
