NETTLE HAY MEAL AS AN ALTERNATIVE TO CONCENTRATED FEED IN GROWING PIGS
Abstract
The influence of feeding different doses of nettle hay meal when replacing concentrated feed on the growth and development of young pigs by live weight and exterior measurements, nutrient consumption per 1 kg of experimental animals, hematological parameters was studied. The control group of pigs in the equalizing and main periods of the experiment received the main diet (OR: barley, wheat, pea and corn stover and sunflower meal). The diet of the second experimental group included nettle hay meal by replacing 12.5% of the protein of the above feeds. The diet of experimental pigs of the third (experimental) group included 25% by protein of nettle hay meal instead of concentrated feed. It was found that prolonged feeding of nettle hay meal to pigs in the amount of 12.5 and 25% of the protein of the diet instead of concentrated feed does not reduce the intensity of their growth, does not lead to an increase in the consumption of feed units, metabolic energy and protein per 1 kg of their growth compared to animals kept on concentrated diets. During the experiment it was noted that boars and pigs had different growth rates depending on the period of the experiment. Thus, at the beginning of the experiment at the age of 5 months, animals of all groups had almost the same live weight, but at the age of 6 months, boars and pigs of the first experimental group exceeded the control group by 1.3 kg (P>0.99). The analysis of indicators for assessing the pattern of growth of pigs shows that the index of intensity of animal formation is higher in young animals of the control group than in analogues of experimental groups. A similar trend is observed in the assessment of the growth stress index. In the process of growth of pigs, the proportions of their body structure change, which depend not only on changes in body weight, so at the age of 8 months pigs receiving 12.5 and 25% of nettle hay meal had the highest linear growth rates compared to the control group. The results of hematological studies showed that the replacement of protein in concentrated feed with nettle hay meal increased the content of red blood cells, hemoglobin and total protein in the blood.
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