2006 Annual Report
Dickinson Research Extension Center
1089 State Avenue
Dickinson, ND 58601
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Effect of field pea-flaxseed blends on receiving
calf weaning performance, immune response,
feedlot performance, carcass quality, and economics
D.G. Landblom1, D.K. Olson2, and C.J. Wachenheim3
1NDSU - 3NDSU -
Agribusiness and Applied Economics Department
Agribusiness and Applied Economics Department
Research conducted in North Dakota has shown field peas to be a nutrient dense and palatable feedstuff with high rumen degradable protein characteristics that can replace corn and barley in virtually all beef cattle feeding situations, i.e. creep-feeding, receiving, backgrounding, and finishing diets (Poland et al., 1996; Anderson, 1998, 1999; Landblom et al., 2002, 2005; Reed, et al., 2004ab, Soto-Navarro et al., 2004;). Field peas have also been shown to improve eating quality of beef (Anderson and Schoonmaker, 2004).
grown predominantly in
While flaxseed, a source of omega-3 fatty acid, has been shown to improve receiving calf health in corn-based diets, research to evaluate the impact of flaxseed on health status, when fed in conjunction with field peas, has not been investigated. The purpose of this investigation is to evaluate the effect of field pea-flaxseed blends on receiving calf performance, carry-over effect on subsequent finishing performance and carcass merit, immediate and carry-over effect on health status, and feeding economics.
hundred seventy-six steer calves (Angus X Hereford X Gelbvieh) that averaged
646 pounds were weaned and randomly assigned across four pelleted dietary receiving/weaning
transition treatments that included a 1) fiber-based control, 2) fiber-base +
10% flaxseed, 3) fiber-base + 20% field pea and 4) fiber-base + 20% field pea and
10% flaxseed. The supplement nutrient
composition and nutrient analysis is shown in Table 1. Each experimental diet was assigned to four
pen replicates with four steers assigned to each pen replicate. Steers were weaned the first week of November
and backgrounded an average 50 days at the
Beginning with the second year of this multiple-year investigation, an immune response component was added to determine the potential impact of flaxseed on calf resistance to bovine respiratory disease.
Two to four weeks before weaning date, calves were vaccinated against economically important bacterial and viral diseases and were administered a booster vaccination for the same diseases at weaning. Blood samples are drawn from the steers at preweaning, weaning, 30, 60, and 90 days postweaning, and serum antibody level for BVD virus types I and II and IBR virus are being determined. In addition the incidence of illness, treatments, and treatment cost are also being recorded.
Results of the receiving/backgrounding transition effect on animal performance, efficiency and economics are shown in Table 2. In the analysis model, treatment, year, and year by treatment interactions are being tested. With the exception of an interaction that was identified for finishing starting weight, no treatment by year interactions were identified in backgrounding and finishing data; therefore, the multiple-year data was combined. On average, and compared to the control diet, supplements that contained flaxseed were 2.09 times higher in fat content and had 6.2% greater net energy for gain. On average, the steers consumed 8.4 pounds of chopped mixed hay and 9.68 pounds of the control and test supplements. When field pea occurred alone in the supplement, intake did not differ between treatments (P > 0.10); however, rate of gain was slower (P < 0.01) and feed per pound of gain was greater (P < 0.10) compared to treatments that included flaxseed. When flaxseed was included alone in the supplement or as a blend with field pea, inclusion was associated with improved rate of gain (P< 0.01) and feed efficiency (P< 0.10) when compared to control and field pea test supplements. Economically, compared to control and field pea test supplements, flaxseed and the field pea-flaxseed blended test supplements were associated with the lowest feed cost per pound of gain (P = 0.01). Compared to the control supplement, feeding a field pea-flaxseed blend reduced the cost per hundred pounds of gain by 13.1% and compared to field pea supplement feed cost per hundred pounds of gain was reduced 11.7%.
The finishing phase of the investigation was conducted
at a commercial feed yard in
The finishing data analysis model includes year, treatment, and a test for year by treatment interactions in the model. In the two-year data set, an interaction was identified for receiving weight and carcass fat depth measured between the 12th and 13th ribs. Receiving weight was greater for field pea-flaxseed backgrounded steers, which is reflective of the performance and efficiency advantages observed when a field pea-flaxseed blended supplement was fed. The data analysis reflects a highly significant year effect for all criteria measured (P < 0.01) with the exception of average daily finishing feed intake, which did not differ for year effect (P > 0.55). Within the finishing data set, no growth performance or carcass measurement differences were recorded that differed significantly.
Finishing economics and a summary associated with retained ownership economics are shown in Table 4. While growth performance among steers that received the field pea supplement during the receiving/weaning transition phase unremarkable, supplementation with field peas in the receiving diet was associated with higher carcass value, higher net return to finishing, and to retained ownership. Compared to the average of the other treatments, field pea inclusion during the receiving period was associated with a $27.93 advantage per steer marketed.
The effect of flaxseed on immune response and health status is incomplete. This component of the study will be completed when the last steer groups are harvested this spring.
While this project is still in progress, results to date suggest that inclusion of field peas and flaxseed during the receiving-weaning transition phase improves backgrounding efficiency and reduces feed cost per hundred-weight. Two years of finishing data suggests that there may be a positive carry-over effect on carcass quality when 20% field peas are included in the backgrounding diet and that field pea carry-over may improve net return to finishing.
Drouillard, J.S., E.J. Good, C.M. Gordon, T.J. Kessen, M.J. Sulpizio, S.P. Montgomery, and J.J. Sindt. 2001. Flaxseed and flaxseed products for cattle: effects on health, growth performance, carcass quality, and sensory attributes. In Proceedings of the 59th Annual Flax Institute of the United States, North Dakota State University, Fargo, ND.
Landblom, D.G., W.W. Poland, G.P. Lardy, J.S. Caton, and C.J. Wachenheim. 2002.
Evaluation of intake restricted pea-based creep diets among calves
Reed, J.J., G.P. Lardy, M.L. Bauer, T.C. Gilbery, and J.S. Caton. 2004a. Effect of field pea level on intake, digestion, microbial efficiency, ruminal fermentation, and in situ disappearance in beef steers fed forage-based diets. J. Anim. Sci. 82:2185-2192.
Reed, J.J., G.P. Lardy, M.L. Bauer, T.C. Gilbery, and J.S. Caton. 2004b. Effect of field pea level on intake, digestion, microbial efficiency, ruminal fermentation, and in situ disappearance in beef steers fed growing diets. J. Anim. Sci. 82:2123-2130.
Soto-Narvarro, S.A, G.J. Williams, M.L. Bauer, G.P. Lardy, D.G. Landblom, and J.S. Caton. 2004. Effect of field pea replacement level on intake and digestion in beef steers fed by-product-based medium-concentrate diets. J. Anim. Sci. 82:1855-1962.
Support for this project is provided by the USDA/CSREES Cool Season Food Legume Special Grant BAK 630-01.
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