Utilization Of Corn Silage By Lactating Dairy Cows
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Utilization Of Corn Silage By Lactating Dairy Cows
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Author : Mehmet Ali Bal
language : en
Publisher:
Release Date : 1999
Utilization Of Corn Silage By Lactating Dairy Cows written by Mehmet Ali Bal and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.
Utilization Of Wet Brewers Grains As A Replacement For Corn Silage In Lactating Dairy Cow Diets
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Author : Christa Lynn Mahnken
language : en
Publisher:
Release Date : 2010
Utilization Of Wet Brewers Grains As A Replacement For Corn Silage In Lactating Dairy Cow Diets written by Christa Lynn Mahnken and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
An evaluation of short-term replacement of corn silage (CS) and soybean meal with a blend of wet brewers grains (BG) and cracked corn on milk production and DMI was completed utilizing 8 primiparous (192 DIM) and 4 multiparous (191 DIM) mid-lactation Holstein cows. Milk production, composition, DMI, production efficiency, fatty acid composition and diet digestibility were evaluated. Cows were allotted to a 4 x 4 Latin Square with 3 replications blocked by parity, DIM and energy corrected milk (ECM). Crude protein and starch levels were balanced between diets by varying the levels of cracked corn and soybean meal in four diets; 0 BG (0% wet BG and 24% CS of diet DM), 12 BG (12% wet BG and 12% CS), 18 BG (18% wet BG and 6% CS), and 24 BG (24% wet BG and 0% CS). Fifteen day periods were used, d11-15 designated for collection. Orts were collected daily and TMRs were fed at 5 to 10% of previous day's intake. Cows were milked 3x/day and individual milk weights recorded at every milking. Milk samples, body weights and BCS were taken -2 and -1d pre-trial to obtain baseline data and d14 and 15 of each period. During collection, samples of TMR and orts were taken d1, 3 and 5. Fecal grab samples were taken d12-15 at 8 hr intervals and advanced 2 hrs every 24 hr period to account for diurnal variation. Dry matter intake was similar (P=0.33) among treatments (20.3, 20.8, 20.9 and 21.2 kg/cow) for 0 BG, 12 BG, 18 BG AND 24 BG respectively, however CP intake of 24 BG tended to be greater (P=0.05) than 0 BG. NDF intake was lower for 0 BG compared to all other treatments and 24 BG was higher than 12 BG (P=0.0007). Dietary fat intake was different (P
Utilization Of Urea Nitrogen In Corn Silage And Concentrate Rations Of Lactating Dairy Cattle With Or Without Sulphur Supplementation
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Author : Donald Guest Grieve
language : en
Publisher:
Release Date : 1971
Utilization Of Urea Nitrogen In Corn Silage And Concentrate Rations Of Lactating Dairy Cattle With Or Without Sulphur Supplementation written by Donald Guest Grieve and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Dairy cattle categories.
The Effect Of Protein In The Concentrate Feed Upon Milk Production And Upon Consumption And Utilization Of Corn Silage By Lactating Cows
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Author : William Marcus Hopper
language : en
Publisher:
Release Date : 1963
The Effect Of Protein In The Concentrate Feed Upon Milk Production And Upon Consumption And Utilization Of Corn Silage By Lactating Cows written by William Marcus Hopper and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1963 with categories.
Effect Of Feeding Corn Silage Based Diets Predicted To Be Deficient In Either Ruminal Nitrogen Or Metabolizable Protein On Nitrogen Utilization And Efficiency Of Use In Lactating Cows
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Author : Erin Beth Recktenwald
language : en
Publisher:
Release Date : 2007
Effect Of Feeding Corn Silage Based Diets Predicted To Be Deficient In Either Ruminal Nitrogen Or Metabolizable Protein On Nitrogen Utilization And Efficiency Of Use In Lactating Cows written by Erin Beth Recktenwald and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
Due to concern over nitrogen (N) emissions, this study attempted to evaluate dietary approaches to reduce N excretion by dairy cattle. Knowledge about potential N sources that were either unaccounted for or under-predicted by CPM Dairy and the Dairy NRC (2001) was used to formulate rations that were much lower in crude protein (CP) than typically fed to dairy cattle but would potentially not decrease production. Specifically, the three diets fed were predicted to have: (1) positive rumen N and metabolizable protein (MP) balances (Diet P) (2) negative MP balance and positive rumen N balance (Diet N), or (3) negative rumen N balance but positive MP balance (Diet T) as predicted by CPM Dairy version 3. The objective of this experiment was to determine whether, and to what extent, the decrease in predicted ruminally available N and MP supply would affect milk production. Eighty-eight multiparous lactating Holstein cows (83 ± 20 DIM), were blocked by average daily milk yield to 50 DIM and parity and assigned to three diets differing in N content or predicted rumen degradability of the feed N. The diets were formulated with CPM Dairy V3 using library values for all feeds except corn silage where actual chemical, digestibility, and degradation rate values were determined and used. The diets (DM basis) consisted of approximately 50% corn silage, 2% wheat straw and 48% of a diet specific ingredient mix and were formulated for 22.2 of kg DMI. Actual diet CP levels were 16.7, 14.2 and 14.3% for Diets P, N and T, respectively. The predicted CPM Dairy rumen N balance at the formulated DMI was 29 and 27 g for Diets P and N and negative 39 g/d for Diet T, whereas the predicted MP balance was 263 and negative 145 and 91 g/d for Diets P, N and T, respectively. Monensin was included in the diets at a formulated intake of approximately 300 mg per cow per d and somatotropin was administered per label. Actual DMI for cattle fed these treatments were 25.7, 25.5 and 24.2 kg/d for Diets P, N and T, respectively and were significantly lower for Diet T. Actual milk yield was 45.0, 42.6 and 43.3 kg/d and 3.5% FCM was 38.1, 36.5, and 36.4 kg/d for cows fed Diets P, N and T, respectively and was significantly lower for cows fed Diets N and T. Milk protein percent was not affected by diet; however, milk protein yield was significantly greater for cows fed Diet P due to the difference in milk yield. Plasma urea N concentrations were 11.31, 8.40 and 7.13 mg/dl for cows fed diets P, N and T, respectively and were different and paralleled the rumen ammonia levels of 8.32, 6.58 and 5.84 mg/dl. Milk fat depression (MFD) was observed in all cows and was not affected by treatment, and the average milk fat levels were 2.67, 2.68 and 2.54% for diets P, N and T, respectively. To determine if monensin was partially responsible for the MFD, monensin was removed from the diets of approximately half of the cows on treatment once they had finished the experimental period. Removal of monensin resulted in a 30% increase in milk fat percent, and milk protein content was not affected. Calculated milk N:intake N ratios for the three treatments were 0.31, 0.33 and 0.36 for Diets P, N and T respectively. The results of this study suggest that more productive N is available than currently predicted by either CPM Dairy and the Dairy NRC (2001). Understanding where these differences exist would allow for feeding less CP to dairy cattle and decreasing N emissions to the environment. It may also be a profitable strategy for dairy farmers, as they would be able to reduce their purchase of costly protein feeds, but that was not demonstrated in this study - primarily due to the severe milk fat depression that decreased the economic value of milk. However, ration cost was not a concern for this experiment, and that aspect can be considered when implementing feeding strategies stemming from this research. (Abstract).
Use Of Corn Forage For Grazing Lactating Dairy Cows An Alternative Management Tool For Dairy Farms
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Author :
language : en
Publisher:
Release Date : 2001
Use Of Corn Forage For Grazing Lactating Dairy Cows An Alternative Management Tool For Dairy Farms written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
Two lactation trials were used to investigate corn grazing as a management tool for dairies. Control (n = 18) cows, housed in free-stall barns were allowed ad libitum access to TMR while Grazing (n = 18 to 36) cows were limit-fed TMR down to 70% of that in Controls and allowed 24-h access to corn plots. By wk 3, Grazing cows consumed 7.9 +/- 1.5 kg/hd/d of standing corn. By wk 7, the crop had matured and Grazing cows consumed 11.42 kg/hd/d of corn grain. Intake of TMR by Controls was 20.07 +/- 0.46 kg DM/hd/d, 19.78% greater than Grazing groups. Corn grazing had no impact on body weight, condition score, or ruminal pH, but significantly increased milk production in the Grazing group. Corn grazing reduced the need for purchased commodities, while improving milk production and performance. The value of saved commodities and increased milk production was $0.71 per cow/d.
The Effect Of Feeding Brown Midrib Corn Silage And Dried Distillers Grains Plus Solubles On Lactational Performance And Nitrogen Utilization By Lactating Dairy Cows
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Author : Hugo A. Ramirez
language : en
Publisher:
Release Date : 2011
The Effect Of Feeding Brown Midrib Corn Silage And Dried Distillers Grains Plus Solubles On Lactational Performance And Nitrogen Utilization By Lactating Dairy Cows written by Hugo A. Ramirez and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
Utilization Of Urea Nitrogen In Corn Silage And Concentrate Rations Of Lactating Dairy Cattle With Or Without Sulfur Supplementation
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Author : Donald Guest Grieve
language : en
Publisher:
Release Date : 1971
Utilization Of Urea Nitrogen In Corn Silage And Concentrate Rations Of Lactating Dairy Cattle With Or Without Sulfur Supplementation written by Donald Guest Grieve and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with categories.
Effects Of Forage Source And Dietary Protein Content On Milk Production And Nitrogen Utilization By Lactating Cows
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Author : Honorato H. B. Santos
language : en
Publisher:
Release Date : 2003
Effects Of Forage Source And Dietary Protein Content On Milk Production And Nitrogen Utilization By Lactating Cows written by Honorato H. B. Santos and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.
Use Of Pro Sil Treated Corn Silage And Fababean Silage In Rations For Lactating Dairy Cows
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Author : Felix Budara Bareeba
language : en
Publisher:
Release Date : 1980
Use Of Pro Sil Treated Corn Silage And Fababean Silage In Rations For Lactating Dairy Cows written by Felix Budara Bareeba and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with categories.