Use of genotype × environment interaction model to accommodate genetic heterogeneity for residual feed intake, dry matter intake, net energy in milk, and metabolic body weight in dairy cattle

The acceptability and efficacy of. combinations of cowpea husk (CH) and maize milling waste (MMW) as feed for the goat were tested. The experiment, in a 4x4 Latin square design involved digestion trials with 4 West African dwarf grower goats weighing 8.2 to 9.6 kg. and about 4 months old. There were 3 experimental diets made up of CH and MMW in 25:75, 50:50 and 75:25 ratio of mixture. The control diet was 60 percent chopped Pennisetum purpureum plus 40 percent concentrate ration. The animals were fed at 5 percent of body weight. All trials lasted 80 days. Parameters for assessment were dry matter intake, protein and energy intakes and utilization. Feed intake values (%of body weight) in all experiemental diets were higher than 3 percent and increased with increasing levels of cowpea husk, Only the intake of 4.38% of body weight from 75:25 CH-MMW supported weight gain. Increases in MMW in the experimental diets resulted in significant (P<0.05) increases in dry matter digestibility. The crude protein intake and digestion increased with increasing inclusion of cowpea husk, but intake and utilization were not adequate at CH-MMW 25:75 and 50:50. The energy intake and utilization increased (P<0.05) across the treatment. Increasing levels of cowpea husk enhanced dry matter, energy intakes and energy utilization, Decreasing levels of cowpea, consistent with increasing MMW improved dry matter digestibility but not dry matter intake. The high crude fibre of cowpea husk is implicated. The utilization of the available energy in the mixture is limited by protein intake.

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Reliability of breeding values for feed intake and feed efficiency traits in dairy cattle: When dry matter intake recordings are sparse under different scenarios

Journal of Dairy Science ◽

10.3168/jds.2018-16020 ◽

2019 ◽

Vol 102 (8) ◽

pp. 7248-7262 ◽

Cited By ~ 4

Author(s):

E. Negussie ◽

T. Mehtiö ◽

P. Mäntysaari ◽

P. Løvendahl ◽

E.A. Mäntysaari ◽

...

Keyword(s):

Dairy Cattle ◽

Feed Intake ◽

Feed Efficiency ◽

Dry Matter ◽

Dry Matter Intake ◽

Breeding Values

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The effect locomotion score and lameness and on dry matter intake and behaviour in dairy cattle

Proceedings of the British Society of Animal Science ◽

10.1017/s1752756200008553 ◽

2002 ◽

Vol 2002 ◽

pp. 199-199

Author(s):

J. K. Margerison ◽

B. Winkler ◽

G. Stephens

Keyword(s):

Dairy Cattle ◽

Feed Intake ◽

Dry Matter ◽

Dry Matter Intake ◽

General Behaviour ◽

Painful Condition ◽

Time Spent Feeding ◽

Locomotion Score ◽

Lying Down

Lameness has been identified as an extremely painful condition (Manson and Leaver, 1988). Studies have found increased locomotion score (LS) and lameness to reduce productivity, while other have found no such reduction (Manson and Leaver, 1988; Kelley et al., 1990; Phillips et al., 1994). Changes in time spent feeding have been associated with changes in LS (Manson and Leaver, 1988) and less time lying down (Hassall, 1993). However, while lame cows change their feeding and general behaviour there is little information regarding the extent and mode of these changes. The objective of this study was to measure the effect of locomotion score on behavior and feed intake.

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THE TESTING OF SEVERAL FEED INTAKE PREDICTION EQUATIONS USING FARM DATA

Canadian Journal of Animal Science ◽

10.4141/cjas81-021 ◽

1981 ◽

Vol 61 (1) ◽

pp. 159-164 ◽

Cited By ~ 7

Author(s):

D. H. YUNGBLUT ◽

J. B. STONE ◽

G. K. MACLEOD ◽

G. F. WILSON

Keyword(s):

Body Weight ◽

Milk Production ◽

Body Condition ◽

Feed Intake ◽

Dry Matter ◽

Dry Matter Intake ◽

Dairy Herds ◽

Regression Equations ◽

Acid Detergent Fibre ◽

The Mean

Data were collected during three visits to each of 19 dairy herds in the Guelph area. Feed intake, body condition and heart girth of all milking cows were recorded during each visit. Samples of all feeds were taken and analyzed for dry matter and acid detergent fibre. Cow weight was estimated from heart girth after grouping cows according to body condition. Milk production and fat test data were obtained from DHI records. Four regression equations were used to predict total feed dry matter intake. The mean daily feed intake was 2.8% of body weight. Eleven of the herds were within ± 10% of this value, four were above this range and four were below. The number of herds in which mean predicted intake was within ± 10% of observed intake, above this range or below this range, were (1) 7, 5, 7 (2) 12, 2, 5 (3) 11, 2, 6 (4) 8, 9, 2 for the four equations, respectively. Equations 2 and 3 were more accurate in predicting mean dry matter intake than Eq. 1 or 4.

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Performance, carcass traits, and non-carcass components of feedlot finished lambs from different residual feed intake classes

Semina Ciências Agrárias ◽

10.5433/1679-0359.2018v39n6p2645 ◽

2018 ◽

Vol 39 (6) ◽

pp. 2645 ◽

Cited By ~ 1

Author(s):

Raizza Fátima Abadia Tulux Rocha ◽

Andréa Roberto Duarte Lopes Souza ◽

Maria Da Graça Morais ◽

Mayara Mitiko Yoshihara Carneiro ◽

Henrique Jorge Fernandes ◽

...

Keyword(s):

Body Weight ◽

Feed Intake ◽

Dry Matter ◽

Average Daily Gain ◽

Carcass Traits ◽

Residual Feed Intake ◽

Dry Matter Intake ◽

Mineral Mixture ◽

The Mean ◽

Daily Gain

This study aimed to assess the performance, carcass traits, and non-carcass components of feedlot finished Texel crossbred lambs from different residual feed intake classes (RFI). Forty-seven uncastrated male Texel crossbred lambs (¾ Texel + ¼ Pantaneira) tested here were 4-month-old with an initial weight of 29.9 ± 5.5 kg. The lambs were confined for 70 days for individual dry matter intake (DMI) and average daily gain (ADG) assessment. The diet containing corn silage was provided as roughage, while the concentrate consisted of corn grain, soybean meal, urea, and mineral mixture with a 40:60 roughage to concentrate ratio and 76.34% total digestible nutrients (TDN). After confinement for 70 days, the lambs were slaughtered to assess carcass traits and non-carcass components. Based on the RFI, lambs were divided into three classes according to the standard deviation (sd): Positive RFI (inefficient, 0.5 above the mean), Negative RFI (efficient, 0.5 below the mean), and Medium RFI (intermediate). Classes with Negative (efficient) and Positive RFI (inefficient) showed no differences in ADG (0.321 vs 0.306 kg; P > 0.05). Dry matter intake (g d-1), and percentage of body weight (BW) differed significantly between the RFI classes (P < 0.05). Compared to lambs in the inefficient class, those in the efficient class (Negative RFI) showed a 9% reduction in DMI and had the same ADG. The lambs in either Positive or Negative RFI classes showed no weight differences between non-carcass components (P > 0.05). The RFI classes showed no differences in shrunk body weight, hot carcass weight, hot dressing, and weight of commercial cuts (P > 0.05). They showed no differences in neck, shoulder + shank, loin, rack, flank steak, rack cap off, and leg weights (P > 0.05). Our results indicate that improvement in feed efficiency, as a function of the RFI index, does not compromise performance and carcass traits of Texel crossbred lambs.

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PSIII-4 Preliminary exploration of relationship of automated sensor data with feed intake and efficiency in lactating dairy cattle

Journal of Animal Science ◽

10.1093/jas/skz122.296 ◽

2019 ◽

Vol 97 (Supplement_2) ◽

pp. 167-168

Author(s):

Cori J Siberski ◽

Brady M Goetz ◽

Lance H Baumgard ◽

James E Koltes

Keyword(s):

Body Weight ◽

Feed Intake ◽

Fixed Effects ◽

Dry Matter ◽

Sensor Data ◽

Dry Matter Intake ◽

Production Traits ◽

Indicator Traits ◽

The Impact ◽

Rolling Windows

Abstract Feed costs represent the greatest expense on a dairy farm, making feed efficiency an important trait to consider among production traits. Current tools to measure feed intake have limited application in commercial settings, due to affordability and lack of portability of technologies. Therefore, development of automated sensor-based indicator traits for feed intake could prove to be valuable. The objective of the current study was to determine if automated eartag data was associated with feed intake. Activity and inner ear temperature were collected every 19 minutes utilizing Quantified Ag eartags (n = 48 lactating cows). Ear tags were placed 5 days prior to the start of the trial, with cows ranging from 67-192 days in milk (DIM). Daily feed intake, milk weights, milk components and body weight (BW) were also recorded. Data were analyzed using PROX GLIMMIX in SAS. Dry matter intake (DMI) was modeled including fixed effects for DIM, milk weight, component composition, metabolic body weight (BW0.75), eartag activity or temperature, as well as the random effects of parity and group. To identify informative timeframes with reduced influence of environmental noise, data were analyzed over 3-day rolling windows of time. Six windows were significantly associated with dry matter intake (P ≤ 0.05) when utilizing ear tag activity. Three windows of time of ear tag temperature were found to be significantly associated with DMI (P ≤ 0.05). These findings indicate that eartag sensor data may be useful indicators of feed intake; however, days in milk and season may impact the informativeness of sensor data. Additional studies are warranted to validate the efficacy of activity and ear temperature as indicators of feed intake and determine the impact of other variables on these potential sensor indicator traits over time.

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PSXIV-36 Effect of corn variety and amylase enzyme on cattle performance and carcass characteristics

Journal of Animal Science ◽

10.1093/jas/skz258.860 ◽

2019 ◽

Vol 97 (Supplement_3) ◽

pp. 434-434

Author(s):

Renan Regatieri Casagrande ◽

Terry Engle ◽

John Wagner

Keyword(s):

Energy Source ◽

Body Weight ◽

Dry Matter ◽

Carcass Characteristics ◽

Feedlot Cattle ◽

Dry Matter Intake ◽

Net Energy ◽

Longissimus Muscle ◽

Marbling Score ◽

Muscle Area

Abstract Four hundred and thirty-three Angus and Angus cross-bred steers (Body Weight 344 ± 13.3 kg) were utilized in this experiment to compare different varieties of grain corn and α-amylase enzyme on feedlot cattle performance and carcass characteristics. Steers were blocked by body weight and breed and randomly assigned to treatments. Treatments consisted of: 1) Commercial commodity corn (CON); 2) Experimental test corn (TEST;), 3) 50:50 blend of CON and TEST corn sources (BLEND), and 4) CON with 5g of α-amylase enzyme added/hd/d (AMZ; Amaize®, Alltech). Steers were slaughtered after 138 days on feed. Feedlot performance, net energy recovery, hot carcass weight, dressing percentage, subcutaneous adipose tissue depth, longissimus muscle area, marbling score, and calculated yield grade data were analyzed as a randomized complete block design using PROC MIXED of SAS. Dietary treatment had no effect (P > 0.20) on BW, average daily gain, feed efficiency, or net energy recoveries. There was a tendency for daily dry matter intake (DMI) to be influenced by treatment: d 0 – d 90 (P < 0.09), d 91 – slaughter (P = 0.11), and d 0 – slaughter (P < 0.08). Dry matter intake was consistently greater for steers receiving the AMZ treatment when compared to all other treatments. Daily DMI for the TEST treatment was consistently lower than DMI for all other treatments. Hot carcass weight (P = 0.56), dressing percentage (P = 0.10), 12th subcutaneous fat depth (P = 0.88), longissimus muscle area (P = 0.84), yield grade (P = 0.91), marbling score (P = 0.76), quality grade (P = 0.67), and the distribution of USDA yield and quality grades (P > 0.74) were similar across treatments. These results indicate the value of the TEST corn as an energy source in feedlot cattle diets is similar to the value of COM corn an energy source.

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