Agrarian Science and Food Technologies

Kulik M.F., Doctor of Agricultural Sciences, Professor, Corresponding member NAAS

Institute of Feed Research and Agriculture of Podillia NAAS

Skoromna O.I., Candidate of Agricultural Sciences, Associate Professor

Vinnitsa National Agrarian University

Obertiukh Y.V., Candidate of Agricultural Sciences

Buhaiov V.D., Candidate of Agricultural sciences

Institute of Feed Research and Agriculture of Podillia NAAS

To supplement the fodder assessment of the green mass of triticale and alfalfa of different phases of vegetation by determining the content of the total amount of organic acids as a criterion of biological value. The method for determining the total amount of Krebs cycle acids and monovalent potassium acid salts and divalent calcium with the conversion to malic acid in air-dry mass has been developed. The portion of the crushed sample was boiled for 10 minutes in distilled water, filtered and titrated with the pH-meter, 50 ml of 0.01 n NaOH filtrate to pH 8.4 and the free acid and potassium acid salts were determined. When titrating the same amount of filtrate 0.01 n HCl to pH 4.4, the content of calcium salts was determined. In the triticale of the Bogodarskoye variety, in the tubing phase, the content of the total amount of organic acids was set at 8.92%, the Bozhich variety – 8.45% and the Desyatynne variety – 8.06%, in the start-up phase in the same sequence by less than 32%, 30% and 42%, and in the flowering phase (ejection of the ear) the content of organic acids was significantly lower than the tube phase. The green mass of alfalfa of 3 varieties (Rodin, Radoslaw and Sinyukh) contains the total amount of organic acids in the budding phase at the level of 9.54-10.73 % and the middle of flowering – 6.60-7.03%. Modern assessment of the fodder value of grasses of different phases of vegetation, based on zootechnical analysis, should be supplemented with biological assessment to determine the content of the total amount of organic acids, which is a very significant indicator of the presence of biologically active substances in the plant and, accordingly, in the feed. Organic acids accumulate in the grass with intense growth and decrease by 50-60% in the later stages of vegetation. Harvesting hay and grass haylage in the early vegetation phase is justified by the high content of organic acids in these feeds, which means high biological value and productive effect in animal feeding.

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