1418 Effects of post-ethanol extraction sorghum silage as an alternative forage in growing and finishing diets on steer performance, carcass characteristic and nutrient digestibility

Abstract The effects of a nutritional packet fed to beef steers during the final 64 d of the feedlot finishing phase on apparent total tract nutrient digestibility were evaluated. Angus-crossbred steers (n =120; initial BW = 544 ± 52 kg) were assigned to 30 pens (4 steers/pen; 15 pens/treatment; pen = experimental unit) in a randomized complete block design. A steam-flaked corn-based finishing diet was fed ad libitum and treatments applied as follows: 1) control and 2) 30 g/steer-daily (DM-basis) of the nutritional packet [containing live yeast (Saccharomyces cerevisiae; 8.7 Log CFU/g), vitamin C (5.4 g/kg), vitamin B1 (13.33 g/kg), NaCl (80 g/kg) and KCl (80 g/kg)]. The nutritional packet used ground corn as a carrier and was included at 1% of diet DM. Orts were quantified daily (if any) and subtracted from the total dietary DM offered to calculate DM intake. Fecal samples were collected twice daily (0700 and 1700 h) for 5 consecutive days (d 47 to 51) from at least 3 steers within pen. Feed samples were collected daily at time of feeding (0630 h). Fecal and feed samples were composited to represent the collection period, dried (55oC), ground (1 mm), and analyzed to assess DM, OM, NDF, ADF, and hemicellulose. In situ (288 h) iNDF was used as an internal marker to measure apparent total tract nutrient digestibility. Data were analyzed using the GLIMMIX procedure of SAS. Intake of DM, OM, and fiber components during the digestibility period was not affected (P ≥ 0.44) by treatment. Steers fed the nutritional packet had increased apparent total tract digestibility of OM (P = 0.02), DM (P = 0.01), NDF (P = 0.02), ADF (P = 0.01), and hemicellulose (P = 0.08; tendency). Improved nutrient digestibility without affecting nutrient intake may warrant an enhanced energy deposition in the carcass.

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The effect of lactose inclusion in finishing diets on nutrient digestibility, nitrogen excretion, lactobacilli concentrations and ammonia emissions from boars

Proceedings of the British Society of Animal Science ◽

10.1017/s1752756200009972 ◽

2005 ◽

Vol 2005 ◽

pp. 86-86

Author(s):

K. M. Pierce ◽

T. Sweeney ◽

J. J. Callan ◽

C. Byrne ◽

P. McCarthy ◽

...

Keyword(s):

Nutrient Digestibility ◽

Nitrogen Excretion ◽

Ammonia Emissions ◽

Pig Production ◽

Finishing Diets ◽

Finishing Pig

There is growing interest in the manipulation of dietary ingredients a means of reducing nitrogen excretion (NE) and ammonia (NH3) losses from pig production. Significant quantities of lactose may reach the hindgut of the older pig undigested, yielding a substrate for bacteria (Kim et al., 1978). It is hypothesised that increasing concentrations of lactose in finishing pig diets will alter NE patterns and reduce NH3-N emission.

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Impact of corn silage moisture at harvest on performance of growing steers with supplemental rumen undegradable protein, finishing steer performance, and nutrient digestibility by lambs1

Translational Animal Science ◽

10.1093/tas/txz011 ◽

2019 ◽

Vol 3 (2) ◽

pp. 761-774 ◽

Cited By ~ 3

Author(s):

F Henry Hilscher ◽

Dirk B Burken ◽

Curt J Bittner ◽

Jana L Gramkow ◽

Robert G Bondurant ◽

...

Keyword(s):

Dry Matter ◽

Average Daily Gain ◽

Nutrient Digestibility ◽

Corn Silage ◽

Neutral Detergent Fiber ◽

Feed Ratio ◽

Finishing Cattle ◽

Distillers Grains With Solubles ◽

Finishing Diets ◽

Rumen Undegradable Protein

Abstract Three experiments evaluated delaying corn silage harvest, silage concentration, and source of supplemental protein on performance and nutrient digestibility in growing and finishing diets. Experiment 1 used 180 crossbred yearling steers (body weight [BW] = 428; SD = 39 kg) to evaluate corn silage dry matter (DM) (37% or 43%) and replacing corn with silage (15% or 45% of diet DM) in finishing diets containing 40% modified distillers grains with solubles. Experiment 2 used 60 crossbred steers (BW = 271; SD = 32 kg) to evaluate corn silage harvest DM (37% or 43%) and response to rumen undegradable protein (RUP) supplementation (0.5%, 1.4%, 2.4%, 3.3%, or 4.2% of diet DM) in silage growing diets. Experiment 3 used 9 crossbred lambs (BW = 30.1; SD = 4.1 kg) to evaluate nutrient digestibility of 37% or 43% DM corn silage in silage growing diets fed ad libitum or restricted to 1.5% of BW. In experiment 1, as corn silage concentration increased from 15% to 45%, average daily gain (ADG) and gain-to-feed ratio (G:F) decreased (P ≤ 0.04). Carcass-adjusted final BW and hot carcass weight (HCW) were lower (P ≤ 0.04) for steers fed 45% corn silage compared to 15% when fed for equal days. As DM of corn silage was increased from 37% to 43%, no differences (P ≥ 0.30) in dry matter intake (DMI), ADG, G:F, or HCW were observed. In experiment 2, as DM of corn silage increased from 37% to 43%, ADG and G:F decreased (P ≤ 0.04). Increasing supplemental RUP in the diet increased (P ≤ 0.05) ending BW, DMI, ADG, and G:F linearly as supplemental RUP increased from 0.5% to 4.2%. In experiment 3, there were no differences (P ≥ 0.56) in DM digestibility and organic matter digestibility between silage harvest DM and intake level. Neutral detergent fiber (NDF) intake was reduced (P < 0.01) for lambs fed the delayed harvest corn silage compared to earlier corn silage harvest. As silage harvest was delayed from 37% to 43% DM, NDF digestibility decreased (P < 0.01) from 64.39% to 53.41%. Although increasing corn silage concentration in place of corn in finishing diets reduced ADG and G:F, delayed silage harvest did not affect performance of finishing cattle. Delayed silage harvest in growing cattle resulted in lower ADG and G:F, possibly due to increased starch or maturity leading to decreased NDF digestibility. The addition of RUP to silage-based, growing diets improves performance by supplying more metabolizable protein and suggests RUP of corn silage is limiting.

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PSXII-12 Silages and roughage sources in the Brazilian beef feedlots

Journal of Animal Science ◽

10.1093/jas/skz258.815 ◽

2019 ◽

Vol 97 (Supplement_3) ◽

pp. 411-411 ◽

Cited By ~ 1

Author(s):

Thiago Bernardes ◽

Thais Castro

Keyword(s):

High Energy ◽

Corn Silage ◽

High Moisture ◽

Finishing Diets ◽

Survey Form ◽

Maximum Value ◽

Whole Plant ◽

The Mean ◽

Sorghum Silage ◽

Beef Feedlots

Abstract The aim of this survey was to identify silages and roughage sources adopted in the beef finishing diets. Eighty-two feedyards, located in 10 states, were surveyed from January to March 2019 for their feeding practices. Feedlot owners and nutritionists were interviewed by using a common survey form. The form consisted of 5 questions, including feedlot location, feedlot capacity and the number of animals serviced yearly, breed, silages and roughage sources, and roughage: concentrate ratio. Results were tabulated in an Excel spreadsheet for each feedlot. The number of responses per question, and the mean, minimum value, maximum value, and mode (most frequently occurring value) were calculated. Feedlot capacity ranged from 300 to 35,000 (mode = 3,000) and cattle serviced yearly per feedlot ranged from 400 to 90,000 (mode = 6,000). Nellore breed and crossbreed represented 74 and 26% % of finished animals, respectively. Roughage: concentrate ratio ranged from 40: 60 to 10: 90. Thirty-five percent of feedlots adopted 20: 80 ratio, followed by 15: 85 (16%) and 10: 90 (16%) ratios. Whole-plant corn silage was the most common roughage source (57%; Figure 1), followed by sugarcane bagasse (17%), tropical grass silages (16%), and whole-plant sorghum silage (11%). Nutritionists also cited hay (9%), sugarcane silage (5%), and fresh sugarcane (4%) as roughage sources. High-moisture corn, snaplage (grain, cob, husk, shank), and reconstituted grain corn were used by 20, 11, and 1% of feedlots, respectively. Reconstituted grain sorghum was included in 4% of the diets. Thus, 36% of feedlots adopted grain silages (corn and sorghum) in the diets. Overall, Brazilian feedlots have used high-energy finishing diets and corn is the most widely grown crop for silage. Feedlots have shown interest in using grain silages to maximize starch digestion, especially because Brazil grows flint corn and silage machinery industry has made available new equipment.

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RAPESEED GUM IN FINISHING DIETS FOR STEERS

Canadian Journal of Animal Science ◽

10.4141/cjas78-020 ◽

1978 ◽

Vol 58 (2) ◽

pp. 139-142 ◽

Cited By ~ 4

Author(s):

G. W. MATHISON

Keyword(s):

Crude Protein ◽

Carcass Characteristics ◽

Rapeseed Meal ◽

Nutrient Digestibility ◽

Animal Performance ◽

Feedlot Performance ◽

Finishing Diets ◽

Ad Libitum ◽

High Level

Fifty steers were fed ad libitum for 127 days to evaluate the effect on animal performance and nutrient digestibility of the addition of rapeseed meal and rapeseed gum to a feedlot ration containing a high level of barley. There were no beneficial responses (P > 0.05) in nutrient digestibility, feedlot performance or carcass characteristics when 5% rapeseed meal was added to a high-barley diet containing 10.8% crude protein. The addition of 0.1, 0.2 or 3% rapeseed gum to the diet also had no significant (P > 0.05) effect on any of the parameters measured.

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