Kraftfoder baserat på spannmål eller betfiber i fullfodersystem till svenska mjölkkor : effekter på mjölkavkastning, foderkonsumtion och resursutnyttjande

Detta är en Master-uppsats från SLU/Dept. of Animal Nutrition and Management

Sammanfattning: The use of cereals as feedstuffs for ruminants has been questioned, critics claim that only fiber rich feed materials such as roughage and by-products belong in dairy cattle feeding. In feed based on by-products, the cereals are usually replaced with sugar beet pulp to provide the dairy cattle with easily fermented carbohydrates. Under Swedish conditions, however, this strategy leads to a lower level of self-sufficiency at national level. Since domestic production of sugar beets is not sufficient to provide all dairy cows with concentrate at today’s levels, the content consists of imported sugar beet pulp, unlike barley that are grown in most parts of the country. Most previous studies have shown that the grain fraction for cows in different lactation stages can be replaced by by-products without affecting the milk yield. A change-over trial with 21 days for each of the two treatment periods was conducted. Forty-eight cows (125 ± 20 DIM) were divided into two treatment groups taking into account lactation number, breed and days in milk. The purpose was to find out how milk yield, body condition score, feed intake, feed efficiency and digestibility were affected by sugar beet pulp-based by-product concentrate without starch (US) and cereal-based by-product concentrate with starch (MS) when fed ad libitum in a total mixed ration (TMR). MS resulted in significantly higher daily feed intake as well as yield measured in kg of milk, kg of ECM, kg of lactose, kg of protein and higher percent of protein in the milk. US resulted in higher feed efficiency, but resulted in a lower financial net in this study. Self-sufficiency and the proportion of human edible feed in the cow diet became higher with MS. In the present study, the Swedish cereals have proved to be a good base in food for dairy cows in order to increase Sweden's selfsufficiency on feed, thereby promoting sustainable domestic food production.

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