Intensive technology of harvesting silage from corn of high-yielding cows

Abstract

   Transit starch is that part of the feed that is not broken down in the rumen, but is almost completely digested by enzymes in the small intestine into glucose and disaccharides. Once absorbed, these sugars become available for energy production. Glucose is a so-called “glucogenic energy source”, which is converted into lactose in the digestive system of dairy cattle, stimulating milk production and protein content in milk. When too much transit starch enters the small intestine, the starch passes through the cow’s digestive system undigested and particles can be the manure. As a result of research, the maximum absorption capacity of transit starch in the small intestine was identified – 1500–1750 g per day, this corresponds to a maximum content 6–7 % of transit starch in the general diet of cows. The main bulk feed for ruminants is corn silage, the production of which in the Republic of Belarus is annually at the level of 20 million tons. In diets where corn silage predominates, transit starch is an essential nutritional component that increases the milk productivity of animals. An increase in the level of starch passing through the rumen in the feed ration by an average of 17.5 % affected the dynamics of cow productivity. This effect manifested itself in the form of an increase in daily milk yield of natural milk by11.76 %, with a significant difference from the control. It should be noted that the change in the level of energy intake into the body and, most importantly, the energy nutrition of cows not only ensured an increase in absolute milk yield, but also caused an improvement in the quality of milk, which manifested itself in an increase in the concentration of fat and at the same time protein in it (2.15 % and 1.35 % respectively). As a result, conversion to milk of basic content showed an increase in milk productivity by 10.37 %.