FEED PRODUCTIVITY OF MIXED AGROCENOSES IN THE FOREST STEPPE OF WESTERN SIBERIA 

The research is carried out on the field of Siberian Research Institute of Forages located in the central forest-steppe of Western Siberia. According to climate conditions, this is moderately warm, poorly hydrated agroclimatic district. The researchers analyzed crop yield and nutritional value of single crop sowings and mixed sowings of annual and legume grains in the forest-steppe of Western Siberia. The authors speak about the reasons and efficiency of storing green mass from multi-component mixtures of forage crops for haylage. These mixtures surpass the crop yield of single-crop sowings on 20-35 %. The highest crop yield of green mass was formed by three-component mixtures «barley 30% + pea 50% + oats 30%» - 43.9 t/hа, and «barley 30%+ pea 50% +wheat 30%» - 37.9 t/hа. Crop yield of green mass of two-component mixtures «barley 75% + pea 35%» was 39.0 t/hа. The haylage received conforms to the fodder of good quality (I-II class) where concentration 0.59-0.71 and 6.2-7.4 МJ of metabolic energy pro a kilo; it is equal to single-crop sowing of pea. According to grain fodder yield, two-component mixtures have more advantages and the following parameters: «barley 75 % + pea 35 %» - 28.9 centners pro ha and « barley 75 % + pea 35 %» - 26.5 centners pro ha, as well as three-component mixtures «barley 30 % + pea 50 % + oats 30 %» - 27. 0 centners pro ha. The part of bean component in these mixtures is 16-32 %, mixture nutrition value is 27-41 % higher than single-crop sowings. Fodder units yield from 1 ha is 26.3-32.4 centners pro ha, what is 15-30 % higher than that of single-crop sowings. Economic efficiency calculation shows that cultivation of mixed sowings is efficient as profit has been increased on 5250-9400 RUB pro ha in comparison with the control group and level of profitability – on 26-38 %.

single-crop sowings and mixed sowings, grains and beans, haylage, grain fodder, fodder unit, digestible protein, solubility and splittability of protein, biochemical parameters of fodder

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