PROCEEDINGS - American Society of Animal Science

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Table 2. Crude protein and neutral detergent fiber concentration and in vitro dry matter disappearance of rumen extrusa samples at the start (mid-October) and end (mid-December) of supplementation from experimental pastures. Extrusa Collection Item Supplementation Start Supplementation End SE CP %, DM basis 2007 8.4 7.6 0.8 2008 8.9 10.3 0.8 NDF %, DM basis 2007 63.3 63.7 1.5 2008 64.5 64.5 1.5 IVDMD, % 2007 69.4 72.8 2.4 2008 72.2 67.7 2.4 Table 3. Cow age × year interactions for weight change, weight-to-height ratio change and weight-to-girth ratio change. Cow Age Item 2 SE 3 SE ≥ 4 SE Interaction P-value Weight change, kg 2007 -29 ax 5 -32 ax 6 -27 ax 4 0.03 2008 -15 ay 5 -13 ay 6 -26 bx 4 Weight-to-height ratio change 2007 -0.32 ax 0.04 -0.32 ax 0.05 -0.32 ax 0.03 0.08 2008 -0.17 ay 0.04 -0.13 ay 0.05 -0.25 bx 0.03 a,b Means in rows with different superscripts differ (P < 0.10). x,y Means in columns with different superscripts differ (P < 0.10). Precipitation (cm) 14 12 10 8 6 4 2 0 Average 2007 2008 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Month Figure 1. Average annual precipitation (30-yr), 2007, and 2008 precipitation by month for Miles City, MT (NOAA, 2007, 2008).
Proceedings, Western Section, American Society of Animal Science Vol. 60, 2009 THE EFFECTS OF REDUCING DIETARY PHOSPHORUS BY THE ADDITION OF BLUEGRASS STRAW TO THE RATIONS OF EARLY TO MID-LACTATION HOLSTEIN DAIRY COWS A.C. Huisman, S.M. Cobb, R. L. Kincaid, J. J. Michal, and K. A. Johnson Washington State University, Pullman 99164 ABSTRACT: Phosphorus (P) excretion by dairy cows is a growing environmental concern. To examine the impact of partially substituting bluegrass straw for alfalfa hay to reduce dietary P in early to midlactation (114 DIM), 12 dairy cows were used in a switchback design. Cows were fed a control TMR (C) or a TMR in which 10% of alfalfa hay DM was replaced by bluegrass straw (BGS) for 3 wk, diets were switched and cows fed for another 3 wk. Daily feed intake and orts were measured, milk and blood samples were collected on d 2, 16, and 37 and analyzed for milk composition and blood NEFA, urea nitrogen and P. In vitro digestibility of the diets and forage samples was determined using an Ankom Daisy Incubator. Inclusion of BGS in the diet reduced the concentration of CP and P (0.39% vs. 0.33%) but increased ADF and NDF. Average DMI (26.4 kg), total in vitro digestibility, DM disappearance, feed costs, income over feed cost, milk fat, milk protein, milk lactose, blood NEFA, blood urea N, and blood P were unaffected by the addition of BGS. Milk yield was reduced by the BGS (P
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PROCEEDINGS Volume 60 American Soci
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Associations of Prolactin Receptor
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Analysis of Estrone Sulphate, Testo
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Duration of Daily Bull Exposure on
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Effects of Time of Transporting Pri
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Academic Quadrathlon D.C. Rule (Uni
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4. Strategic Plan. The A&C committe
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California, Davis are participating
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WSASAS Symposium Budget: (based on
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Proceedings, Western Section, Ameri
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costs) as “free money” or “pr
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Relative expression Relative expre
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Results and Discussion Calves were
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0.10). Mixed model analyses of thes
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to be 0.11 and 0.14 in the two herd
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efficiency have significant implica
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pilot study that warrants more inve
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steer left the squeeze chute and a
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Gregory, M. E., C. T. Blunn, and M.
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et al. (1990) estimated heritabilit
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Effective population size (N e ), d
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Literature Cited Aho, A. V., B. W.
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Table 3. Estimates of genetic param
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261.98±20.24, 268.30±9.57, 298.50
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Table 1. Least squares means for bi
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DNA, then DNA was washed with EtOH
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Table 1. Least squares means and st
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(Table 1). Cows were combined into
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Rhoades, R. D., J. E. Sawyer, K. Y.
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pregnancy rate was determined via t
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Table 1. Effect of heifer developme
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determined via transrectal ultrason
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Table 1. Effect of winter system on
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increased HCW of steers born earlie
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Proceeding, Western Section, Americ
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degrees of freedom method was used
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Table 2. Supplement × physiologica
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to water and a loose macro- and mic
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Table 2. Effects of calving body co
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ased on average quality and availab
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1 See figure legends for descriptio
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the most important criterions in ra
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Results Perceptions of profitabilit
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input cost into the system. Sand an
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Physiological state has also been h
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Table 3 Percent crude protein (CP),
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conducted for 90 d from Dec 1, 2007
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In f o Proceedings, Western Section
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identified in the commercially avai
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The absence of shade in pen decreas
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T e m Figure 2. Impact of three pre
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weaning date can have a positive im
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Table 1. Systems Backgrounding Perf
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Results and Discussion Maximum and
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Figure 2. Oxygen levels of two comp
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contemporary groups where two intac
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Sund, J. M. and M. J. Wright. 1956.
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thiamin), or 4) HIGH (150 mg·hd -1
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Literature Cited Buckner, C. D., T.
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Serum estradiol concentrations were
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Literature Cited AOAC. 1999. Offici
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Results The BFTH contained four and
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The genetic correlation between MS
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Acknowledgements Red Angus Associat
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absorbed from the small intestine (
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ather than May (P < 0.10). Differen
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May July Low Mod High SE Table 3. R
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Aubrey, TX) to achieve a concentrat
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hormone concentrations in stallions
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* * Figure 3. Mean cortisol concent
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in psyllium-supplemented horses but
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References AOAC. 1990. Official Met
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Implications If available and cost
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Slaughter Characteristic of Ram and
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2003). Study 2 included trials in J
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are more accurate than external mar
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than animals fed 24% CP-diet during
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Over complete 28 days fattening exp
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uminally undegradable protein presu
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Todd, A. L., L. M. M. Surber, S. D.
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2006. Effects of supplementing drie
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warm-season annual legumes were use
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parturition was similar for all cow
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Table 3. Average spring 2009 percen
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evaluated based on significant effe
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Table 1. Effect of supplemental cor
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ated by two ultrasound examinations
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Table 1. Percentages of heifers tha
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Treatment 2 was the 12 h interval o
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treated with a CIDR for 14 d exhibi
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≤ ≥ Table 1. Description of cow
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andomly assigned to CO-Synch+CIDR (
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Johnson, S. K., and R. D. Jones. 20
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ultrasound examinations of each ova
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Fernandez, D. L., J. G. Berardinell
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Statistical analysis Data were anal
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physical stress on the body and, th
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hypercortisolism is a characteristi
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FIG. 3. Mean circulating plasma con
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synthesise cDNA. The thermocycler p
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Proportion of cows that were estrua
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January, and homogenized samples fr
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exhibit the presence of a corpus lu
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Even though, mean leptin concentrat
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2004). The swine catheter was used
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Table 2. Breed effect on ewe longev
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the cannula to moderately inflate t
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PGE1, 8-epi-PGF2 alpha, trichosanth
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Experiment 2. Forty-two multiparous
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Table 1. Components of d 7 post-mat
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Medical Solutions Diagnostics, Los
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Page 301 and 302: LITERATURE CITED Camacho, L. E., J.
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Page 355 and 356: particles in the diet (Leonardi and
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concentrate on the nutritive value
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Results and Discussion Dry matter i
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Crouse J.D., J. R. Busboom, R. A. F
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Table 2. Performance of weaned calv
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important role in enteric methane p
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Figure 1. Dynamics of rumen oxidati
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Table 1. Diet composition Item DM b
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120 +LPS -LPS 10.0 8.0 +LPS -LPS To
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(EE), respectively. Sunflower oil (
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Table 4: Fatty acid concentrations
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Kennely, J.J. 1996. The fatty acid
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Davis, K. C., 248 Davis, N. E., 372
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Orosco, G., 409 Ortega, J., 414, 42
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PROCEEDINGS - American Society of Animal Science

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