Abstract
The ratios of pea and barley seeds for growing in mixed crops for the purpose of preparing juicy feed and obtaining grain fodder in the conditions of low-lying peatlands of the North-East of the Non-Chernozem zone of Russia are determined. Heat treatment of grain fodder from peas and barley in a ratio of 50:50 at a coolant temperature of 1100 C a duration of 30 minutes, as well as preservation of silage with LMAC (low molecular acid concentrate) reduced the solubility and cleavability of raw protein in the rumen, contributed to an increase in the use of nitrogen and energy for productive purposes when feeding lactating cows. Feeding of pea and barley silage processed with LMAC in the ratio (25:75) and processed grain mixture (50:50) as part of the main feeding diet of new – bodied cows increased the use of nitrogen taken – by 5.29%, digested-by 8.27 %. During the experiment period, the average daily milk yield of natural milk in the control group averaged 21.18 kg, in II-23.06 and in III – 25.49 kg. The difference in favor of the experimental group III was 4.31 kg (p < 0.05), and in II – 1.88 kg (p < 0.05) or 11.89 and 3.29%, respectively, in terms of 4% milk, the difference was 5.06 and 2.19 kg or 25.08 and 10.86 %. At the same time, the costs of exchange energy for obtaining 1 kg of milk with 4% fat content decreased by 10%, raw protein by more than 7 %.
Effects of Concentrate on Barley Silage and Nitrogen Utilization by Lactating Cows Fed Large Amounts of Urea
