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ARS Home » Midwest Area » St. Paul, Minnesota » Plant Science Research » Research » Publications at this Location » Publication #87098
Title: EFFECT OF FEEDING CORN HYBRIDS SELECTED FOR LEAFINESS OR GRAIN TO LACTATING DAIRY COWS

Author
item KUEHN, C - UNIVERSITY OF MINNESOTA
item LINN, J - UNIVERSITY OF MINNESOTA
item JOHNSON, D - UNIVERSITY OF MINNESOTA
item Jung, Hans Joachim
item ENDRES, M - MYCOGEN PLANT SCIENCES

Submitted to: American Dairy Science Association Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 7/28/1998
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Sixty-two cows (23 multiparous (M) and 39 primiparous (P)) were used to determine the effect of corn silage variety on milk production. Corn silages were a high grain (G), leafy (L), or generic-blend (C) variety. Diets were formulated to contain (DM basis) 40.6% corn silage, 10.2% alfalfa haylage, 23.5% corn grain, 7.4% whole fuzzy cottonseed, 7.2% soybean meal (48%), 5.3% dried distiller's grains, 1.3% blood meal, and 4.5% vitamin and mineral supplement. Cows were placed on their dietary treatment 3 d after calving and remained on the diet for 154 days. Average DM and nutrient content (DM basis) of the silages during the trial were 36.7%, 34.6%, and 38.7% DM; 43.7%, 45.6%, and 45.1% NDF; 23.6%, 24.3%, and 24.4% ADF; and 7.0%, 6.9%, and 7.3% CP for the G, L, and C, respectively. The average in vitro digestible DM (IVDMD) and in vitro digestible NDF of the silages were 66.8%, 69.2%, and 66.7%; and 34.6%, 38.0% and 34.4% for G, ,L, and C, respectively. Average daily DM and nutrient intakes did not differ between dietary treatments. Intakes of DM and NDF averaged 22.3 and 7.0; 22.4 and 7.2; and 21.8 and 6.9 kg/d for G, L, and C, respectively. Daily intakes of IVDMD material for G, L, and C were 17.0, 17.3, and 16.6 kg/d. Daily milk, 3.5% fat corrected milk (FCM), fat, and protein production did not differ across dietary treatments. Milk production and FCM averaged 35.1 and 37.1; 35.2 and 37.5; and 36.3 and 38.8 kg/d for G, L, and C, respectively. Corn silage variety had no significant effect on average daily DM and nutrient intakes or milk production parameters.