2006 Abstracts - American Society of Animal Science

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135 Influence of corn hybrid on kernel traits and digestibilityfor cattle. F. W. Harrelson*, G. E. Erickson, T. J. Klopfenstein, L. A.Nelson, and D. S. Jackson, University of Nebraska, Lincoln.Corn hybrids can influence feedlot cattle performance based on kernelcharacteristics. An experiment was designed using 60 commercially availablehybrids, from 22 companies, which were grown for yield testing byDepartment of Agronomy and Horticulture at Nebraska. Hybrids weregrown in 4 plot replicates in one location and sampled at harvest. Sampleswere analyzed for three separate tests including 1000 kernel weight,Stenvert hardness test, and an in situ DM digestibility (iDMD) plusproduction traits. The iDMD procedure used two ruminally cannulatedsteers, two incubations for 24 h, and two replications per plot perhybrid (32 total replications per hybrid). Because iDMD mimics ruminaldigestion, any relationships between iDMD and physical traits areof primary interest. Averaged across all hybrids, iDMD was 50.5 ±1.5% (range 47.5-52.4). Test weight (kg/L) was negatively correlated toiDMD (r=-0.53; P
138 Sow and litter performance in individual crate and groupbedded hoop barn gestation systems. P. J. Lammers* and M. S.Honeyman, Iowa State University, Ames.The effects of gestation system on sow and litter performance over a 2.5yr. period were evaluated. Gestation housing system treatments were 1)individual gestation crates in a mechanically ventilated, partially slattedfloor manure flush confinement building (C); and 2) group pens withindividual feed stalls in deep-bedded, naturally ventilated hoop barns(H). In all, 957 litters from 304 sows were analyzed using general linearmodels. Cull events (120) that occurred during the study were analyzedfor correlations between housing treatment and reason for culling. Numberborn alive per litter was different for the two housing treatments (P< 0.001) with H resulting in 0.8 more pigs born per litter. Parity differenceswere also noted (P < 0.01), however there was no interactionbetween parity and treatment. H sows also weaned 0.4 pigs more perlitter (P < 0.01). The rate of pre-wean mortality did not differ for thetwo housing treatments. Cross fostering occurred to approximatelyequalize litter size within a farrowing room. The effects of parity, farrowingseason (quarterly), pig birth weight, and lactation length on preweanmortality were significant (P < 0.01). There was a trend for Csows to have a 1-day shorter wean-to-conception interval (P = 0.07).Farrowing rates for the two treatments were not different. There was aninteraction (P = 0.04) between breeding season (quarterly) and treatmentwith H sows bred in summer and C sows bred in autumn havingthe lowest farrowing rate. There was no correlation between treatmentand reason for culling. Failure to conceive was the leading reason forculling in both treatments. There was a trend for sows gestated in C tobe culled for feet and leg unsoundness. H sows tended to be culled forpoor body condition. Results indicate that gestating sows can be housedin deep-bedded hoop barns equipped with individual feeding stalls andachieve results comparable or superior to gestating sows housed inindividual crated gestation systems.Key Words: Sow and litter performance, Gestation crates, Bedded hoopbarns139 A survey of dairy compost barns in Minnesota. A. Barberg*,M. Endres, and J. Salfer, University of Minnesota, St. Paul.Composting bedded pack barns have raised much interest recently as analternative dairy housing option. The construction of these facilities inMinnesota has been a producer initiative with the first barn built in2001. No descriptive data on compost barns were available to date.Therefore, a survey of 13 compost barns was conducted between lateJune 2005 and September 2005. Producers were interviewed on variousaspects related to this housing system, samples of bedding and milkwere collected, cow behavior was evaluated, and cows were scored forlocomotion, body condition, hygiene and hock lesions. On average,73.7% of the cows had no hock lesions, 23.1% showed mild lesions(hair loss) and only 3.2% of cows had severe lesions (swollen hocks).The average BCS was 3.04 (± 0.11) with a range of 2.88 to 3.17. Onaverage, only 9.25% of the cows were clinically lame (score of 3 orgreater for locomotion). Cow hygiene scores averaged 2.7 (± 0.24) in ascale of 1 to 5 (1=clean; 5=dirty). The average DHIA somatic cell countwas 325,000 (± 172,273) cells/mL. Bulk tank cultures were analyzed ona composite sample of four or five bulk tank pickups. Two out of 13farms had a high level of Strep. agalactiae, one farm was found to havea high level of Staph. aureus, six farms had high levels of Non-ag Strep,and four farms had high levels of coliforms in the milk. The average lyingspace per cow was 8.1 (± 2.7) m 2 /cow with a range of 3.5 to 14.3 m 2 /cow. Temperatures were taken at each of 12 locations across the packtwice 1 wk apart at various depths (15, 30.5, 61 and 91 cm). The averagetemperature across depths was 42.3 (± 6.65)°C. The cost of buildingthe barn ranged from $33,000 to $300,000. The main reasons for buildingthis type of housing system were for improved cow comfort, cowhealth and longevity, and ease of completing daily chores. The largestconcern was the cost and availability of bedding, especially as additionalcomposting bedded pack barns are built. All of the producers weregenerally satisfied with their decision to build a compost barn and believethat it was the right choice for housing their dairy herd.Key Words: Compost barns, Bedded pack, Dairy cows141 The relationship between inflammatory condition and liveractivity in the puerperium and their consequences on fertility indairy cows. G. Bertoni 1 , E. Trevisi 1 , X. Han 2 , and M. Bionaz* 1 , 1 Istitutodi Zootecnica, Universita Cattolica del Sacro Cuore, Piacenza, Italy,2 University of Saskachewan, Saskatoon, Canada.The relationships between inflammatory indexes, liver functionalityimmediately after calving, and fertility in dairy cows were investigated.Multiparous dairy cows (n=120) were monitored throughout lactation.Blood samples were collected on 7, 14, and 28 days in milk (DIM).Milk yield was measured weekly until 90 DIM. Disease occurrenceduring the first 90 DIM and breeding activities were recorded. Fortythreecows were excluded because of culling and serious health problemsafter 30 DIM. The remaining 77 pregnant cows were retrospectivelygrouped into quartiles based on a liver activity index (LAI) that includedalbumin, total cholesterol and vitamin A. Data were analyzed using themixed model procedure or the frequency procedure of SAS. Cows in thelowest quartile (LO) had a higher (P < 0.001) concentration of haptoglobinin plasma measured at 7 DIM than those of the upper quartile (UP)(0.76 vs 0.28 g/L, respectively) indicating a more severe inflammatorycondition, as partly confirmed by the higher occurrence of health disorders(32 vs 5 % of cows respectively; P < 0.04). Cows in the intermediatelower quartile of LAI (INLO) had the lowest and cows in UP thehighest reproductive performance (2.7 vs 1.7 services per pregnancyand 139 vs 93 days open for INLO and UP respectively, P < 0.05). Milkyield, however, was similar between these groups (3.31 vs 3.45 tonduring the first 90 DIM for INLO and UP, respectively). The LO groupdid not show a reduced reproductive performance (two services perpregnancy and 110 d open) despite the highest inflammation status, buttended to produce less milk than UP (3.03 vs 3.45 ton during the first 90DIM). The overall data suggest that cows with higher LAI, having no oronly slight inflammatory condition, had higher performance in milkproduction and reproduction than cows with lower LAI. Our data suggestalso that the relationship between reproductive performance andmilk yield is not tight, but the presence of inflammatory condition thatlikewise affect liver functionality, seems to have an important role.Key Words: Fertility, Liver functionality, Inflammatory condition45
Page 1: Table of ContentsAbstractPageNumber
Page 5 and 6: Graduate Student Oral Competition -
Page 7 and 8: 13 Effect of corn hybrid and proces
Page 9 and 10: height. About 5 g of cecum content
Page 11 and 12: to 70. Placental IGF-I tended to in
Page 13 and 14: dent-intruder score (RIS) was given
Page 15 and 16: 37 Hormone concentrations of produc
Page 17 and 18: main person responsible for managin
Page 19 and 20: 50 Environmental factors affecting
Page 21 and 22: tions did not differ among treatmen
Page 23 and 24: Table 1. Effects of ractopamine on
Page 25 and 26: 67 Effect of feeding reduced phosph
Page 27 and 28: 73 Effect of feed intake level, bod
Page 29 and 30: Ruminant Nutrition79 Effect of impr
Page 31 and 32: and site of digestion. Treatments c
Page 33 and 34: Menten (GMM) functions. Two pig spe
Page 35 and 36: crystalline structure of starch gra
Page 37 and 38: 103 Relationship between dietary fa
Page 39 and 40: 112 Effects of supplementing natura
Page 41 and 42: 118 Application of 2-hydroxy-4-(met
Page 43 and 44: 124 Ruminant diet composition effec
Page 45: 131 Impact of fiber types on rumen
Page 49 and 50: 147 Structural correctness and mobi
Page 51 and 52: 153 Propionate regulation of feed i
Page 53 and 54: 161 Genetically improving the produ
Page 55 and 56: elative to heifers receiving MGA al
Page 57 and 58: tus ventralis and the infraspinatus
Page 59 and 60: three weeks for the remainder of th
Page 61 and 62: tion over the course of a 112-d per
Page 63 and 64: ies have indicated that a sizable p
Page 65 and 66: lower urine pH (P < 0.0001) and blo
Page 67 and 68: 204 Effect of weaning age on nurser
Page 69 and 70: Ten Broeck*, D. Clopton, R. Bott, M
Page 71 and 72: creasing DDGS. Forage intake in hay
Page 73 and 74: (Avena sativa; SW) to oat harvested
Page 75 and 76: offal from 26,231 head; and 406,405
Page 77 and 78: heritability and gain during the 20
Page 79 and 80: ackgrounding (BG) and finishing (F)
Page 81 and 82: having rancid, bloody, and bitter f
Page 83 and 84: to 14, and was higher (P < 0.03) in
Page 85 and 86: 261 Effects of supplemental RDP ver
Page 87 and 88: ammonia, and total VFA increased ov
Page 89 and 90: Dairy Extension Symposium - Innovat
Page 91 and 92: tion of nonpregnant cows early post
Page 93 and 94: 285 Effect of feeding diets contain
Page 95 and 96: 291 Effect of dietary flaxseed, fla
Page 97 and 98:
Edmonton, AB. Canada, 2 Department
Page 99 and 100:
capillary number density (CND)) by
Page 101 and 102:
allowed to expose for 2 weeks, deve
Page 103 and 104:
of sulfur (1700 ppm) and fed with r
Page 105 and 106:
correlated (r=0.56; P
Page 107 and 108:
Table 1. CDR (% of BLUP) for S1-S5
Page 109 and 110:
Author IndexASAS/ADSA Midwestern Se
Page 111 and 112:
Jenschke, B., 170Jiménez, E., 307J
Page 113:
Stahly, T. S., 66Stalder, K., 9, 56
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2006 Abstracts - American Society of Animal Science

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