Distillers Grains Use in Dairy Cattle Operationsand Effect on production and Milk Characterics: What Does the Research Say? Ethanol Co-Product Storage and Utilization In Grazing Systems UNL Ag Research and Development Center Mead, NE June 3, 2009 US Cow Population Milk/cow Issues: Corn Milling co-products - Low levels of LYS - High levels of 18:2 - Low levels of starch Research Objectives Understand Nutrient Utilization
Understand Feed Chemical Composition Milk Yield Rumen Microbe Animal Understand Effects of Production Chemical Composition Mobile Bag Technique: RUP and dRUP (Kononoff et al., 2007)
Protein Ruminal and Intestinal Protein Digestibility
Feedstuff %DM %CP RUP (%CP) dRUP TT CP Digest. (%CP) Corn Bran 90.7 13.5 20.7 65.8 93.1 Corn Germ 91.0 16.3 16.5 66.8 94.5 WCGF 55.9 26.7 11.5 51.1 94.4 DDGS 86.9 28.9 56.3 91.9 95.4 WDGS 45.6 29.9 44.7 96.9 HP-DDGS 94.7 47.2 55.2 97.7 98.7 SBM1 89.1 49.9 24.3 93.0 N/A Bloodmeal1 90.2 95.5 70.9 80.0 1Kelzer et al., 2007 AA Conc. in the RUP [ ] (% CP) 1Kelzer et al., 2007 NDF and rumen fermentation
Rate, %/h NDF Digestion (24 h) NDFDigestion (48 h) Bran 6.2 79.8 86.6 Germ 7.6 83.1 89.6 HP-DDGS 12.0 70.6 84.8 DDGS 6.8 75.6 86.3 Tedeschi et al. (2008) Rumen Biohydrogenation
Bamguard et al., 2000 Lipid Fractions of Co-products
1Kelzer et al., 2007 Milk Production and Co-Products WCGF and 305 d Milk Yield Objective:
To determine the effects of feeding WCGF during lactation (and the dry period). Experimental Units: 36 Primiparous Holstein Cows 40 Multiparous Holstein Cows Diets Control (%DM) WCGF (%DM) Alfalfa Haylage 17.8 10.4 Alfalfa Hay
12.0 8.5 Corn Silage 29.8 18.9 Soypass 1.7 Corn, ground 20.3 12.5 SBM, 48% CP 6.0 0.45 Cottonseed 8.7 5.1 Blood Meal 0.6 0.5 Tallow 0.7 Urea 0.08 WCGF 0.0 38.0 Mineral/Vit Mix 2.4 2.9 WCGF-L WCGF-DL Control Effect of diet on milk production over 43 weeks of lactation.
Treatment P-Value Control WCGF-L1 WCGF-DL2 SEM DIET PARITY T*P3 DMI, pd/d 46.6b 55.9a 52.4a 0.8 < 0.01 NS Milk, pd/d 68.4b 77.0a 76.3a 4.6 0.03 3.5 % FCM 76.3b 85.6a 79.9ab 4.2 0.10 0.04 Milk/DMI, pd/pd 1.50 1.43 1.55 0.09 Effect of diet on test day milk composition over 43 weeks of lactation.
Treatment P-Value Control WCGF-L1 WCGF-DL2 SEM DIET PARITY T*P3 Fat, Percent 4.15a 3.94ab 3.74b 0.08 < 0.01 NS Yield, pd/d 2.86 3.15 0.15 Protein, 3.19 3.17 3.16 0.04 2.4b 2.53a 2.42ab 0.13 0.03 Body condition score means for the respective treatments over the entire lactation were 3.33, 3.36, 3.34 (SE 0.04, P = 0.84). The Effect of Feeding Increasing Levels of Dried Distillers Grains Plus Solubles to Dairy Cows
4 Dietary Treatments Control, no Dried Distillers Grains 10% diet DM 20% diet DM 30% diet DM Four 28d periods 20 cows DIM Janicek et al., 2008 Experimental Diets Control, 0% 30% DDGS Corn Silage 30.05 23.95
Alfalfa Haylage 10.88 9.34 Alfalfa Hay 9.44 Soybean Meal 4.77 Soybean Hulls 10.36 Cottonseed 6.61 DDGS 30.0 Ground Corn 16.28 12.10 Soy Pass 5.60 1.14 Urea 0.26 Tallow 1.04 0.92 Bloodmeal 0.68 Vit/Min premix 2.6 2.01 Chemical Composition Control, 0% 30% DDGS DM, % 57.79 61.72
NEL, (Mcal/lb) 0.78 CP, % DM 18.7 18.9 Fat, % DM 4.3 5.17 NDF, %DM 33.7 34.7 P, % DM 0.40 0.42 RUP, % CP 39.8 47.9 Janicek et al., 2008 Results - DMI pds/d Linear effect; P = 0.03 Results Milk Production
Linear effect; P = 0.08 Janicek et al., 2008 Fat and Protein Yield, kg/d
Janicek et al., 2008 DDGS and milk CLA 0% DDGS 10% DDGS 20% DDGS 30% DDGS SEM P-Value Milk
3.70 3.64 3.73 3.55 0.15 0.31 C18:0 15.5 15.1 15.0 14.6 0.44 0.10 C18:1, c9 2.02 2.22 3.19 3.31 0.22 < 0.01 C18:1 t9 24.0 24.6 24.8 0.66 0.33 CLA c9, t11 0.34 0.55 0.80 0.98 0.06