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2008

Kansas State University Libraries

Dairy Science

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Articles 1 - 7 of 7

Full-Text Articles in Life Sciences

High Inclusion Rate Of Wet Corngluten Feed On Performance Oflate-Lactation Holstein Cows:Preliminary Results (2008), D.J. Rezac, K.N. Grigsby, Barry J. Bradford Jan 2008

High Inclusion Rate Of Wet Corngluten Feed On Performance Oflate-Lactation Holstein Cows:Preliminary Results (2008), D.J. Rezac, K.N. Grigsby, Barry J. Bradford

Kansas Agricultural Experiment Station Research Reports

A novel diet formulation strategy incorporating wet corn gluten feed at 47% of diet dry matter was evaluated in late-lactation cows. Diets were formulated for similar protein and energy concentrations with dramatic differences in forage sources. Milk fat and protein concentrations increased with the high wet corn gluten feed inclusion rate, and this diet tended to increase milk fat yield. The preliminary work indicates that very low cost rations incorporating wet corn gluten feed may be formulated to maintain milk production, at least in late-lactation cows.; Dairy Day, 2008, Kansas State University, Manhattan, KS, 2008; Dairy Research, 2008 is known …

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Dietary Molasses Enhancesruminal Biohydrogenationand Partially Alleviates Diet-Induced Milk Fat Depression (2008), Barry J. Bradford, Evan C. Titgemeyer Jan 2008

Dietary Molasses Enhancesruminal Biohydrogenationand Partially Alleviates Diet-Induced Milk Fat Depression (2008), Barry J. Bradford, Evan C. Titgemeyer

Kansas Agricultural Experiment Station Research Reports

Milk fat depression remains a problem on dairy farms, and in recent years, incorporation of distillers grains (typically with solubles added and often dried) has contributed to this problem on some farms. In this study, we evaluated whether molasses could prevent milk fat depression in cows fed a high-risk diet. Replacing up to 5% of dietary corn with cane molasses linearly increased the yield of short- and medium-chain fatty acids in milk, indicating a positive effect on de novo fatty acid synthesis in a milk fat depression environment. Molasses, however, tended to linearly decrease milk yield and linearly decreased milk …

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Alfalfa Hay Inclusion Ratein Wet Corn Gluten Feed Baseddiets (2008), C.R. Mullins, K.N. Grigsby, Barry J. Bradford Jan 2008

Alfalfa Hay Inclusion Ratein Wet Corn Gluten Feed Baseddiets (2008), C.R. Mullins, K.N. Grigsby, Barry J. Bradford

Kansas Agricultural Experiment Station Research Reports

In this experiment, we evaluated the effects of varying alfalfa inclusion rate in diets containing 31% wet corn gluten feed on a dry matter basis. Eighty lactating Holstein cows were allocated into groups of 10 and assigned to 1 of 8 pens balanced for parity, stage of lactation, and milk yield. Diets were formulated to contain 0, 7, 14, or 21% alfalfa on a dry matter basis. Diets containing greater proportions of alfalfa had less corn silage and soybean meal but more corn grain. Feed intake, milk production, body weight, and body condition score were monitored, and effects of increasing …

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Resynchronized Pregnancyrates In Dairy Cattle: Timingof Gonadotropin-Releasinghormone Injection Before Timedartificial Insemination (2008), C.A. Martel, Jeffrey S. Stevenson Jan 2008

Resynchronized Pregnancyrates In Dairy Cattle: Timingof Gonadotropin-Releasinghormone Injection Before Timedartificial Insemination (2008), C.A. Martel, Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

Lactating dairy cows and replacement virgin heifers of unknown pregnancy status were treated with either gonadotropin-releasing hormone (GnRH) or saline to initiate a resynchronization program that was continued 7 days later when a not-pregnant diagnosis was determined. Nonpregnant cattle were administered prostaglandin F2αand then either injected with GnRH 56 hours later and artificially inseminated (AI) by appointment at 72 hours or injected and inseminated concurrently at 72 hours. Injection of GnRH at 56 hours produced more pregnancies than injection of GnRH at 72 hours when AI was administered at 72 hours in both treatments (30.9 vs. 15.2%). Further, starting the …

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Progesterone, Follicular,And Estrual Responses Toprogesterone-Based Estrusand Ovulation Synchronizationprotocols At Five Stages Of Theestrous Cycle (2008), Jeffrey S. Stevenson Jan 2008

Progesterone, Follicular,And Estrual Responses Toprogesterone-Based Estrusand Ovulation Synchronizationprotocols At Five Stages Of Theestrous Cycle (2008), Jeffrey S. Stevenson

Kansas Agricultural Experiment Station Research Reports

The objective of this study was to monitor changes in ovarian status in heifers exposed to a progesterone insert with or without concurrent gonadotropin-releasing hormone (GnRH) injection. Estrus was manipulated in 283 heifers (31 breeding clusters) by administering GnRH, progesterone, and prostaglandin F2α(PGF2α) at 5 stages of the estrous cycle. Estrus was presynchronized with a progesterone insert for 7 days before PGF2αwas administered 24 hours before insert removal. Successive clusters of heifers were assigned to treatments (2 heifers per treatment) on cycle day 2, 5, 10, 15, and 18. Treatments consisted of a progesterone insert (day 0) for 7 days …

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Estimating Optimal Operationtime Of Korral Kools On Dairycows In A Desert Environment (2008), X.A. Ortiz, John F. Smith, Barry J. Bradford, Joseph P. Harner Jan 2008

Estimating Optimal Operationtime Of Korral Kools On Dairycows In A Desert Environment (2008), X.A. Ortiz, John F. Smith, Barry J. Bradford, Joseph P. Harner

Kansas Agricultural Experiment Station Research Reports

Developing management strategies for Korral Kools will help producers provide cooling in the housing area while minimizing the operational cost of the Korral Kools system. Two experiments were conducted at a dairy in Saudi Arabia to evaluate operational time of Korral Kools for multiparous and primiparous dairy cows. For multiparous cows, running time per day of Korral Kools should be continuous, but for primiparous cows, no difference in performance was detected between 21 and 24 hours. However, producers need to be careful when reducing daily operation time of Korral Kools for primiparous cows because elevated core body temperatures were observed …

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Opportunities With Low Profilecross Ventilated Freestallfacilities (2008), John F. Smith, Joseph P. Harner, Barry J. Bradford, M.W. Overton Jan 2008

Opportunities With Low Profilecross Ventilated Freestallfacilities (2008), John F. Smith, Joseph P. Harner, Barry J. Bradford, M.W. Overton

Kansas Agricultural Experiment Station Research Reports

Low profile cross ventilated freestall buildings are one option for dairy cattle housing. These facilities allow producers to control the cows' environment during all seasons of the year. As a result, an environment similar to the thermoneutral zone of a dairy cow is maintained during both summer and winter, resulting in more stable core body temperatures. Low profile cross ventilated facilities allow buildings to be placed closer to the parlor, thus reducing the time cows are away from feed and water. Other advantages include a smaller overall site footprint than naturally ventilated facilities and less critical orientation because naturally ventilated …

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