THE FORMATION OF GREEN MASS CROP CAPACITY AND THE CHANGEABILITY OF BOTANIC COMPOSITION OF PASTURE GRASS BY YEARS OF USING DEPENDING ON FERTILIZING

It was set the experiments results as for the learning of the influence of different variants of fertilizing for the formation of green mass crop capacity and the changeability of botanic composition of cereal and cereal-bean grass of pasture using. It was established that the crop capacity indexes of pasture grass were changed by the cycles and the years of using. The largest part of the harvest during the whole period of the experiments was in the first cycle, the least – in the third or the forth ones. The including to the composition of grass mixture of alfalfa yellow hybrid provided the increasing of green mass harvest on the average during experiment years to 43.0-51.3% comparing with cereal grass. It was noticed that the improving of mineral nourishment of plants provides the increasing of crop capacity of green mass of cereal grass, comparing with the control to 2.04-4.45 t/ha or 13.56-29.57%, cereal-bean – to 4.40-8.33 t/ha or 20.5-38.7% depending on the fertilizer method. Among the experimental methods of fertilizing the maximum increase (4.45 t/ha or 29.5% – on the cereal grass and 8.33 t/ha or 38.7% – on cereal-dean) of harvest of pasture grass was got in the combining of mineral fertilizer applying (P₆₀K₆₀) with ploughing in of green-manure crop (mustard whitе). It was set that the botanic composition of pasture grass is not the grand static but it is changed by years and the cycles of using, depending on the composition of grass mixture and the method of fertilizing. It was established that the improving of mineral nourishment promotes the essential increasing of the part of sowed kinds of grass in both kinds of grass stand