Effect of partial replacement of forage neutral detergent fiber with by-product neutral detergent fiber in close-up diets on periparturient performance of dairy cows.
The objective of this study was to determine the effect of partial replacement of forage neutral detergent fiber (NDF) with by-product NDF in close-up diets of dairy cattle on periparturient metabolism and performance. Holstein cows (n = 45) and heifers (n = 19) were fed corn silage-based diets containing 1) 30% oat hay, or 2) 15% oat hay and 15% beet pulp from d -21 relative to expected parturition until parturition. After parturition, all animals received the same lactation diet. Animals were group-fed from d -21 to -10 relative to expected parturition and fed individually from d -10 until 14 d in milk. Animals were required to have at least 5 d of prepartum dry matter intake (DMI) data to remain on the study. Data were analyzed as a randomized design and subjected to ANOVA using the MIXED procedure of SAS. Close-up diet did not affect DMI, total tract nutrient digestibility, energy balance, or serum content of nonesterified fatty acids and beta-hydroxybutyrate during the last 5 d prepartum. Prepartum body weight and body condition score were similar between treatments. There was no carryover effect of close-up diet on DMI, energy balance, milk yield, body weight, body condition score, or serum content of nonesterified fatty acids and beta-hydroxybutyrate during the first 14 d in milk. In summary, partial replacement of forage NDF (oat hay) with by-product NDF (beet pulp) did not affect periparturient metabolism or performance.
Dann
H M
HM
William H. Miner Agricultural Research Institute, Chazy, NY 12921, USA. dann@whminer.com
Carter
M P
MP
Cotanch
K W
KW
Ballard
C S
CS
Takano
T
T
Grant
R J
RJ
D020155:3-Hydroxybutyric Acid / Q000097:blood; D000821:Animal Feed / Q000032:analysis; D000818:Animals; D018554:Avena / Q000378:metabolism; D027461:Beta vulgaris / Q000378:metabolism; D001824:Body Constitution; D001835:Body Weight; D002417:Cattle / Q000502:physiology*; D002418:Cattle Diseases / Q000453:epidemiology; D003612:Dairying; D004032:Diet / Q000662:veterinary*; D004043:Dietary Fiber / Q000008:administration & dosage / Q000378:metabolism*; D004435:Eating / Q000502:physiology; D005230:Fatty Acids, Nonesterified / Q000097:blood; D005260:Female; D007774:Lactation / Q000502:physiology*; D008892:Milk / Q000737:chemistry / Q000378:metabolism; D049590:Postpartum Period; D011247:Pregnancy; D013997:Time Factors
D004043:Dietary Fiber; D005230:Fatty Acids, Nonesterified; D020155:3-Hydroxybutyric Acid