The utilization by beef steers of a soft high lysine and a hard normal maize cultivar in whole grain feedlot diets

Slabbert, N. P.; Bolt, M.J.; Shelby, T; Campher, J.P.

doi:10.1016/0377-8401(88)90017-x

Cited by 8 publications

(3 citation statements)

References 17 publications

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“…73:228-235 The response to feeding high-lysine corn to cattle has been variable. Nelson et al (197 1) and Slabbert et al ( 1988) observed increased daily gains and improved feed efficiency for steers fed high-lysine corn, whereas Thomas et al (1975) observed lower gains and similar feed efficiencies for steers fed high-lysine vs control corn. Thus, the objectives of these studies were 1 ) to compare high-lysine and control corn on finishing calf performance, 2 ) to determine whether possible interactions exist between grain source (control and high-lysine corn) and protein source and level in altering gain and efficiency of finishing calves, and 3 ) to determine the effects of high-lysine corn on starch and N utilization in beef cattle.…”

Section: Introductionmentioning

confidence: 95%

High-lysine corn as a source of protein and energy for finishing calves.

Ladely¹,

Stock²,

Klopfenstein³

et al. 1995

Journal of Animal Science

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Three trials evaluated the protein and energy value of high-lysine corn for finishing calves. In Trial 1, 60 finishing steer calves were used to evaluate corn source (high-lysine vs control) and protein source (urea, blood meal [BM], corn gluten meal [CGM]) and level (BM and CGM addition; low, medium, high). Calves were individually fed using Calan gates for 102 d, and then were pen-fed (two pens per corn treatment) the remaining 83 d. During the initial 102 d, calves fed high-lysine corn had similar gains but were 6% more efficient (P < .10) compared with calves fed control corn. Performance did not differ (P > .10) among sources or levels of protein supplementation. Over the entire feeding period (185 d), calves fed high-lysine corn were 10% more efficient (P < .10) than calves fed control corn. In the second study, in situ starch disappearance was faster (P < .10) and the proportion of CP degraded by 12 h was 27% greater (P < .10) for high-lysine corn than for control corn. In a metabolism trial, five steers fitted with ruminal, duodenal, and ileal cannulas were used in a randomized block design to evaluate the effect of corn source on site and extent of digestion. Intake and ruminal and total tract digestibility of OM and N did not differ (P > .10) between corn sources. Steers fed high-lysine corn tended to have greater ruminal (P = .23) and postruminal (P = .18) starch digestion, resulting in greater (P < .10) total tract starch digestibility.(ABSTRACT TRUNCATED AT 250 WORDS)

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Section: Introductionmentioning

confidence: 95%

High-lysine corn as a source of protein and energy for finishing calves.

Ladely¹,

Stock²,

Klopfenstein³

et al. 1995

Journal of Animal Science

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“…Similarly, in an experiment with finisher pigs, less soybean meal was needed to maximize performance in diets based on QPM compared with diets using normal maize (Burgoon et al, 1992). Beef steers fed on high-lysine maize gained weight significantly faster than those fed on the conventional maize (Slabbert et al, 1988).…”

Section: Typementioning

confidence: 99%

Quality Protein Maize for the Feed Industry in Kenya

Nyanamba¹,

Wahome²

2010

Outlook Agric

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Quality protein maize (QPM) has increased levels of lysine and tryptophan, limiting amino acids for monogastric animals, so its use in animal feed reduces the need for more expensive high-protein sources. The authors, through the application of a linear programming optimization model with the composition and prices of feed components used at the coast, show that the cost reduction from substituting QPM for regular maize in poultry feed for Kenya is 5% (mainly as a result of a reduction in fishmeal). The optimal ratios based on QPM and regular maize were calculated and formulated, and trials showed that broilers raised with either mixture had the same food intake, mortality and growth. Moreover, when the chickens were fried in the style popular at the coast, there was no difference in the taste of the meat between the two batches. If QPM were to replace regular maize in broiler feed in Kenya, a 5% cost reduction would translate into a gain of US$300,000. If the cost reduction were passed on to the broiler producers as a reduction in feed price, producers would be expected to gain on average US$32 per year. If the cost reduction were not passed on to the broiler producers, it would result in an extra profit for the feed industry.

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“…A limited amount of research has been conducted, addressing the effects of high-lysine corn on cattle performance, with variable results. Nelson et al (1971), Slabbert et al (1988) and Ladley et al (1995) reported improved feed efficiencies for feedlot cattle fed diets containing high-lysine corn compared with diets containing typical yellow corn. In contrast, Thomas et al (1975) and Trenkle (2000a) reported similar gains and feed efficiency when feedlot cattle were fed high-protein corn hybrids.…”

Section: High Protein Corn In Livestock Dietsmentioning

confidence: 99%

The effects of specialty corns and processing method on dry matter intake, nutrient digestion and nitrogen metabolism in growing steers

Dikeman¹

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Ten steers, average beginning weight of 345 kg, were used in a digestibility trial to evaluate the effects of corn type and corn processing on DMI, nutrient digestion and nitrogen metabolism. Experimental design was a 10x10 Latin square with a 2 x 5 factorial arrangement consisting of 2 processing methods (whole or cracked) and 5 corn types, normal (NC), high-oil (HOC), white (WC), high-protein (HPC) and high-oil-high protein (HOHPC). Diets were formulated to be isonitrogenous (13% CP) and contained 87% concentrate (DM basis). Feedstuffs, orts and feces were collected and analyzed for dry matter (DM), organic matter (OM), starch, ether extract (EE), nitrogen (N), acid detergent fiber (ADF) and neutral detergent fiber (NDF). Urine was collected and analyzed for N. No differences were observed for dry matter intake (DMI), DM digestibility, ADF digestibility or fecal N excretion based on corn type (P>.1). Digestion of OM differed (P=.05) befinreen HPC (81.54%) and HOHPC (78.72%). Starch digestion was different (P=.02) for HOHPC (92.99°/a) and NC (89.44%). Digestion of CP of NC (76.75%) differed (P=.02) from HOHPC (74.07%). Fat digestion for NC and HOHPC differed from 74.53% to 79.39°/a, respectively (P=.04). Digestion of NDF of WC differed from NC (P=.0012) and HOHPC (P=.004) and were 63.43%, 56.47% and 56.92%, respectively. N intake was lower for HOHPC (P<.05) compared with the other types. Urine N differed (P=.009) between HOHPC (57.8 g/d) and WC (47.40 g/d). Retained N was lower for HOHPC compared with the other types (P<.0001) resulting in poorer N balance for HOHPC (P<.05). Cracking corn by rolling increased the digestion of DM, OM, starch, and fat by 2.6, 2.4, 5.3 and 7.4%, respectively. NDF digestion decreased 3.9%. X Cracking corn did not affect DMI, protein or ADF digestibility or N metabolism. A trend. (P=.0733) for an interaction befinreen corn type and processing for starch digestion was detected. No other interactions were detected. Based on these data, specialty corns were projected to have limited improvements in feeding value in diets of growing steers when compared with NC. Cracking may improve the nutrient availability of corn without affecting N metabolism in growing cattle.

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The utilization by beef steers of a soft high lysine and a hard normal maize cultivar in whole grain feedlot diets

Cited by 8 publications

References 17 publications

High-lysine corn as a source of protein and energy for finishing calves.

High-lysine corn as a source of protein and energy for finishing calves.

Quality Protein Maize for the Feed Industry in Kenya

The effects of specialty corns and processing method on dry matter intake, nutrient digestion and nitrogen metabolism in growing steers

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