INFLUENCE OF TREATMENT WITH BIOFERTILIZERS OVER THE CHEMICAL COMPOSITION AND THE ENERGY NUTRITIONAL VALUE OF FORAGE FROM BIRDSFOOT TREFOIL

Abstract

During the period of 2010–2012 at the experimental field of RIMSA–Troyan was studied the independent effect of the following biofertilizers: phosphorus humate (3000 l/ha), boron humate (1000 l/ha) and molybdenum humate (1000 l/ha) and the combination (phosphorus humate 2500l/ha + boron humate 1000 l/ha + molybdenum humate 1000 l/ha) on the chemical composition and the energy nutritional value of forage of birdsfoot trefoil. It was found out that the use of preparations increased the content of raw protein in the forage with the values from 4.39 to 16.56%, as the most effective was the effect of boron humate. After the independent application of phosphorus humate, as well as its combination with boron and molybdenum humate, the crude fiber were with the lowest values, and boron and molybdenum increased their content by 8.57 and 5.88%. Raw fats had the highest content after treatment by boron humate (4.79% over the control) and NFE by phosphorus humate (4.24% over the control). The highest positive effect over the food units of milk (FUM) and growth (FUG) showed the treatment of birdsfoot trefoil by boron humate, as a result of which FUM exceeded the control by 8.84%, and FUG by 12.84%. Fertilization by biofertilizers contributed to obtain forage of birdsfoot trefoil close to its organic growing.