scholarly journals The influence of RFI classification and cow age on body weight and body condition change, supplement intake, and grazing behavior of beef cattle winter grazing mixed-grass rangelands

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. S68-S73
Author(s):  
Cory T Parsons ◽  
Julia M Dafoe ◽  
Samuel A Wyffels ◽  
Megan Van Emon ◽  
Timothy DelCurto ◽  
...  
Keyword(s):  
Body Weight ◽  
Beef Cattle ◽  
Body Condition ◽  
Grazing Behavior ◽  
Condition Change ◽  
Mixed Grass ◽  
Winter Grazing ◽  
Supplement Intake

scholarly journals 282 The Influence of RFI classification and cow age on body weight and body condition change, supplement intake and grazing behavior of beef cattle winter grazing mixed-grass rangelands

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 208-208
Author(s):  
Cory T Parsons ◽  
Julia M Dafoe ◽  
Samuel Wyffels ◽  
Megan Van Emon ◽  
Timothy DelCurto ◽  
...  
Keyword(s):  
Body Weight ◽  
Beef Cattle ◽  
Body Condition ◽  
Age Groups ◽  
Intake Rate ◽  
Grazing Behavior ◽  
Gps Collars ◽  
Winter Grazing ◽  
Grazing Period ◽  
Supplement Intake

Abstract behavior of beef cattle winter grazing rangelands in North Central Montana. A herd of non-lactating commercial Angus cows, n = 205 (yr-1) and n = 203 (yr-2), ranging in age from 1 to 9 yr old, grazed rangeland pastures (586 ha) from mid-October to early January of 2018 and 2019. Cows were grouped into 6 age classes to evaluate the effects of RFI and age on average daily individual supplement intake, CV of supplement intake, and intake rate, as well as changes in body weight and body condition during an 84-day grazing period each year. Additionally, 30 cows were stratified by age and RFI and fitted with Lotek GPS collars each year to record distance traveled and time spent grazing. Change in cow weight differed by year where cows in yr-1 gained 26.3 ± 1.96 kg while cows in yr-2 lost 19.2 ± 1.96 kg during the 84-day grazing period (P < 0.01). Change in BCS exhibited an age × RFI interaction (P = 0.05); however, an analysis within age groups did not result in differences between RFI classifications (P ≥ 0.27). There was an interaction between RFI, age and year related to supplement intake expressed as g∙kg cow bw-1∙d-1 where in year 2, 4-yr-old high RFI cattle consumed less supplement than 4-yr-old low and average RFI cattle (P < 0.01). Supplement intake rate expressed as g∙min-1 also differed by year (P < 0.01), with cows in yr-1 consuming less supplement per minute than in yr-2 (29.9 ± 1.81 and 91.8 ± 1.87). There were no effects of RFI, cow age or year on time spent grazing (P ≥ 0.19) with cows averaging 6.1 ± 0.61 hrs per day grazing. In summary, cow age had an influence on supplement intake, change in weight and body condition, and grazing behavior, while RFI classification had minimal effects.

scholarly journals The influence of age and environmental conditions on supplement intake and behavior of winter grazing beef cattle on mixed-grass rangelands1

2018 ◽  
Vol 2 (suppl_1) ◽  
pp. S89-S92 ◽  
Author(s):  
Samuel A Wyffels ◽  
Alyson R Williams ◽  
Cory T Parsons ◽  
Julia M Dafoe ◽  
Darrin L Boss ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Environmental Conditions ◽  
Mixed Grass ◽  
Winter Grazing ◽  
And Behavior ◽  
Supplement Intake

scholarly journals The Influence of Residual Feed Intake and Cow Age on Beef Cattle Performance, Supplement Intake, Resource Use, and Grazing Behavior on Winter Mixed-Grass Rangelands

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1518
Author(s):  
Cory T. Parsons ◽  
Julia M. Dafoe ◽  
Samuel A. Wyffels ◽  
Timothy DelCurto ◽  
Darrin L. Boss
Keyword(s):  
Beef Cattle ◽  
Resource Utilization ◽  
Resource Use ◽  
Site Selection ◽  
Linear Increase ◽  
Grazing Behavior ◽  
Quadratic Effect ◽  
Mixed Grass ◽  
Supplement Intake ◽  
Cattle Performance

The objectives of this study were to evaluate the influence of RFI and cow age on the supplement intake and grazing behavior of beef cattle. Average daily supplement intake (kg/cow/d) displayed an RFI × cow age interaction (p < 0.01), with a linear increase in average daily supplement intake with increasing RFI of 3-year-old cows (p < 0.01). Average daily supplement intake (g ∙ kg BW−1 ∙ d−1) displayed an RFI × cow age interaction (p < 0.01), with a quadratic effect on supplement intake of 3-year-old cows (p = 0.01). Cow age displayed a quadratic effect on variation of supplement intake (p < 0.01), where 1-year-old cows had a greater CV of supplement intake than all other cow ages (p < 0.01). Distance traveled displayed a cow age × RFI interaction (p = 0.02), where high-RFI 5-year-old cows traveled further per day than low 5-year-old RFI cows. The probability of grazing site selection was influenced by cow age (p ≤ 0.03). In summary, heifer post-weaning RFI had minimal effects on beef cattle performance, grazing behavior, or resource utilization; however, cow age impacted both grazing behavior and resource use.

scholarly journals The influence of age and winter environment on Rumax Bovibox and Bovibox HM supplement intake behavior of winter grazing beef cattle on mixed-grass rangelands

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. S37-S42
Author(s):  
Samuel A Wyffels ◽  
Cory T Parsons ◽  
Julia M Dafoe ◽  
Darrin L Boss ◽  
Tyrell P McClain ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Mixed Grass ◽  
Winter Grazing ◽  
Supplement Intake

scholarly journals 286 The influence of age and winter environment on Rumax Bovibox and Bovibox HM supplement intake behavior of winter grazing beef cattle on mixed-grass rangelands

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 210-211
Author(s):  
Samuel Wyffels ◽  
Cory T Parsons ◽  
Julia M Dafoe ◽  
Darrin L Boss ◽  
Tyrell McClain ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Daily Intake ◽  
Nutrient Delivery ◽  
Quadratic Effect ◽  
Mixed Grass Prairie ◽  
Mixed Grass ◽  
Winter Grazing ◽  
Quadratic Effects ◽  
And Behavior ◽  
Supplement Intake

Abstract This study evaluated the influence of cow age and temperature adjusted for windchill (Twindchill) on supplement intake behavior of cattle winter grazing northern mixed-grass prairie rangelands. A commercial herd of 291 (yr-1) and 316 (yr-2) bred cows were winter grazed on a 329-ha rangeland pasture for 2 years. Cows were assigned to one of six age classifications and were provided free-choice access to Rumax Bovibox HM (2018–2019) and Rumax Bovibox (2019–2020) protein blocks. The target daily intake range was 0.45–0.91 kg∙cow-1∙d-1. Supplement was provided in a SmartFeedPro self-feeder system to measure individual animal supplement intake and behavior. Average daily supplement intake (expressed as kg∙cow-1∙d-1) and variation in supplement intake displayed Twindchill × cow age × yr interactions (P ≤ 0.05). There was no effect of age on daily supplement intake at below average and above average Twindchill in yr 1 (P ≥ 0.07). Age displayed a quadratic effect on daily supplement intake at average Twindchill in yr-1 (P &lt; 0.01) but was limited to 3- and 4-yr-old cattle consuming more supplement per day than yearlings (P ≤ 0.02). During yr-2, cow age had a quadratic effect on supplement intake for all Twindchill conditions (P &lt; 0.01) where 3-yr-old cattle consumed more supplement per day than yearlings, 5–7- and ≥ 8-yr-olds (P ≤ 0.01). Cow age exhibited quadratic effects on variation in supplement intake across all Twindchill conditions during both years (P &lt; 0.01). However, the quadratic effects of age in yr-1 were limited to yearlings having higher variation in supplement intake than all other ages (P &lt; 0.01). In summary, both cow age and the winter environmental conditions interacted to influence animal supplement intake behavior and, as a result, nutrient delivery efficacy in winter grazing beef cattle.

scholarly journals The influence of age and environmental conditions on supplement intake by beef cattle winter grazing northern mixed-grass rangelands

2020 ◽  
Vol 98 (7) ◽  
Author(s):  
Samuel A Wyffels ◽  
Julia M Dafoe ◽  
Cory T Parsons ◽  
Darrin L Boss ◽  
Timothy DelCurto ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Environmental Conditions ◽  
Daily Intake ◽  
Weather Data ◽  
Canola Meal ◽  
Linear Effect ◽  
Mixed Grass ◽  
Winter Grazing ◽  
Effect Of Age ◽  
Supplement Intake

Abstract This study evaluated the influence of cow age and temperature adjusted for wind chill (Twindchill) on supplement intake behavior of beef cattle winter grazing northern mixed grass prairie rangelands. A commercial herd of 272 (year 1) and 302 (year 2) bred cows (Angus, Simmental × Angus) ranging in age from 1- to 12-yr-old grazed a 329-ha rangeland pasture (~1.5 ha animal unit monthˉ 1) from November to January. Cows were grouped into seven age classes (1 yr old, 2 yr old, 3 yr old, 4 yr old, 5 yr old, 6 yr old, and ≥ 7 yr old) and were provided free-choice access to a 30% CP self-fed canola meal-based pelleted supplement with 25% salt to limit intake. The target daily intake was 0.91 kg cowˉ 1 dˉ 1. Supplement was provided in a SmartFeed Pro self-feeder system to measure individual animal supplement intake and behavior. An Onset HOBO U30-NRC Weather Station was placed near the supplement feeders to collect weather data for the entirety of the grazing period. Average daily supplement intake and the coefficient variation in supplement intake displayed a Twindchill × cow age × year interaction (P ≤ 0.02). There was a negative linear effect of age on supplement intake (kg cowˉ 1 dˉ 1) for days with below average Twindchill conditions in both years (P &lt; 0.01). There was also negative linear effect of age on supplement intake (g kg of BWˉ 1 dˉ 1) at average Twindchill in year 1 and below average Twindchill in year 2 (P &lt; 0.01). Cow age had a quadratic effect on supplement intake for days with below average Twindchill in year 1 (P = 0.02); however, this was a curvilinear response where yearlings and 2-yr-olds consumed more supplement per kilogram of BW than other age cattle (P &lt; 0.01). Cow age had positive linear effects on variation in supplement intake at below average Twindchill conditions in both years (P &lt; 0.01). Daily visits to the supplement feeders displayed a Twindchill × cow age interaction (P &lt; 0.01), where there was a linear decrease in visits with increasing age at below average Twindchill conditions (P &lt; 0.01). In summary, both cow age and the winter environmental conditions interacted to influence animal supplement intake behavior and, as a result, nutrient delivery efficacy in winter grazing beef cattle.

scholarly journals The Influence of Age and Winter Environment on Protein Block Intake Behavior of Beef Cattle Winter Grazing Mixed-Grass Rangelands

Ruminants ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 191-201
Author(s):  
Samuel A. Wyffels ◽  
Cory T. Parsons ◽  
Julia M. Dafoe ◽  
Darrin L. Boss ◽  
Boone H. Carter ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Free Choice ◽  
Intake Rate ◽  
Nutrient Delivery ◽  
Mixed Grass ◽  
Winter Grazing ◽  
Grazing Period ◽  
Mixed Age ◽  
Protein Block ◽  
Supplement Intake

This study evaluated the influence of cow age and temperature adjusted for windchill (Twindchill) on supplement intake behavior of cattle winter grazing rangelands. A mixed-age herd of Angus-based cows (291 and 316 in year 1 and 2, respectively) were classified by age (1-, 2-, 3-, 4-, 5–7-, and ≥8-year-old) and grazed rangeland pasture (329-ha) for two consecutive winters. Cows were provided free-choice access to supplement protein blocks in a SmartFeedPro self-feeder system. An Onset HOBO Weather Station collected data throughout the grazing period. Supplement intake (expressed as kg∙d−1 and g∙kg body weight−1), the coefficient of variation in supplement intake and intake rate (g∙min−1) displayed Twindchill × cow age × year interactions (p ≤ 0.02). In general, cow age displayed a quadratic effect on all supplement intake variables (p ≤ 0.04), where 3- to 4-year-old cattle had the greatest supplement intake with the least variation, while yearling cattle had the least amount of supplement intake and the greatest variation. In conclusion, winter environmental conditions interacted with cow age to affect cattle supplement intake behavior and, consequently, the efficacy of nutrient delivery systems for beef cattle winter grazing on rangelands.

scholarly journals An evaluation of the relationship between supplement intake behavior, performance, and grazing behavior by beef cattle grazing northern mixed-grass rangelands

2019 ◽  
Vol 3 (Supplement_1) ◽  
pp. 1802-1806 ◽  
Author(s):  
Samuel A Wyffels ◽  
Tyrell P McClain ◽  
Julia M Dafoe ◽  
Cory T Parsons ◽  
Darrin L Boss ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Cattle Grazing ◽  
Grazing Behavior ◽  
Mixed Grass ◽  
The Relationship ◽  
Supplement Intake

scholarly journals Relationship of Supplement Intake Behavior to Performance and Grazing Behavior of Cattle Grazing Mixed-Grass Rangelands

2021 ◽  
Vol 9 (2) ◽  
pp. 248
Author(s):  
Samuel A. Wyffels ◽  
Julia M. Dafoe ◽  
Cory T. Parsons ◽  
Darrin L. Boss ◽  
Timothy DelCurto
Keyword(s):  
Performance Metrics ◽  
Cattle Grazing ◽  
Birth Date ◽  
Grazing Behavior ◽  
Grazing Season ◽  
Mixed Grass ◽  
Cow Performance ◽  
Relationship Of ◽  
Supplement Intake ◽  
Cattle Performance

This study evaluated the relationships between supplement intake behavior, beef cattle performance, and grazing behavior on dormant northern mixed-grass rangelands. In each of two years, a commercial herd of bred cows grazed a rangeland pasture from November to January. All cattle were managed as one contemporary group. Calf birth date, birth weight, and adjusted 205-day weaning weight were collected for each cow following the grazing season each year as cow performance metrics. During the grazing season, all cattle were provided free-choice access to a self-fed supplement. Supplement intake behavior was measured for each individual. Grazing behavior was monitored for 30 randomly selected individuals. The relationship of individual average daily supplement intake (R = 0.65; ρ = 0.65), supplement consumption rate (R = 0.58; ρ = 0.54), the coefficient of variation of supplement intake (R = 0.51; ρ = 0.50), and the amount of time spent at the feeder (R = 0.47; ρ = 0.49) were positively correlated and ranked across years (P < 0.01), suggesting individual animal supplement intake behavior is repeatable for cattle grazing dormant season rangelands. Additionally, there were multiple significant associations between supplement intake behavior, cattle performance, and grazing behavior (P ≤ 0.05); however, the majority were weak associations that accounted for minimal variation in cattle performance and grazing behavior (R ≤ 0.27; r2 ≤ 0.07). Although supplement intake behavioral traits were repeatable across years, its use as a metric to predict animal performance and grazing behavior may be limited.

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