Maintenance energy requirements of young Holstein cattle from calorimetric measurements at 6, 12, 18, and 22 months of age

Jiao, Haopeng; Yan, Tianhai; Wills, David; McDowell, D.A.

doi:10.1016/j.livsci.2015.05.031

Cited by 11 publications

(14 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Data on body weight, body weight gain and feed intake used to calculate the accumulated CH4 emissions in the present study were reported by Jiao et al (2013). Gender (heifers vs. steers) had no effect (P > 0.05) on BW at age of 6 (175 vs. 176 kg), 12 (315 vs. 325 kg), 18 (485 vs. 502 kg) or 22 (562 vs. 575 kg) months.…”

Section: Body Weight Body Weight Gain and Feed Intakementioning

confidence: 90%

“…The data on BW, feed intake and energy metabolism used to calculate enteric CH 4 emission data for the present study, were published by Jiao et al (2013).…”

Section: Methodsmentioning

confidence: 99%

“…During the pre-weaning period, the accumulated CH 4 emission (kg) was calculated using a CH 4 conversion factor which was multiplied by total gross energy (GE) intake from consumed milk and milk replacer or total ME intake from consumed concentrates and straw. The CH 4 factor for the former calculation (0.0039 MJ MJ −1 of CH 4 -E over GE intake) was derived from growing pigs (Jørgensen et al, 2011), while for the latter the estimate was from ratios of CH 4 -E/ME intake for individual cattle measured at 6 months of age in the present study (Jiao et al, 2013). Total intakes of milk replacer and concentrates were recorded and consumptions of milk and straw were estimated (Morrison et al, 2012).…”

Section: Calculation Of Accumulated Ch 4 Emissionsmentioning

confidence: 95%

“…The daily ME m (MJ day −1 ) was derived from metabolic BW (kg 0.75 ) multiplied by ME m per metabolic BW (MJ (kg 0.75 ) −1 ). The ME m (MJ (kg 0.75 ) −1 ) used from the weaning to 6 months of age was derived using data measured at 6 months age (Jiao et al, 2013). The ME m (MJ (kg 0.75 ) −1 ) used for other 3 half years periods (7-12, 13-18 and 19-24 months) was derived from data (Jiao et al, 2013) measured at the beginning of each period (6, 12 and 18 months, respectively) and then gradually changed to those derived from data measured at the end of each period (12, 18 and 22 months, respectively).…”

Section: Calculation Of Accumulated Ch 4 Emissionsmentioning

confidence: 99%

See 3 more Smart Citations

Development of prediction models for quantification of total methane emission from enteric fermentation of young Holstein cattle at various ages

Jiao

Yan

Wills

et al. 2014

Agriculture, Ecosystems & Environment

View full text Add to dashboard Cite

Section: Body Weight Body Weight Gain and Feed Intakementioning

confidence: 90%

“…The data on BW, feed intake and energy metabolism used to calculate enteric CH 4 emission data for the present study, were published by Jiao et al (2013).…”

Section: Methodsmentioning

confidence: 99%

Section: Calculation Of Accumulated Ch 4 Emissionsmentioning

confidence: 95%

Section: Calculation Of Accumulated Ch 4 Emissionsmentioning

confidence: 99%

See 2 more Smart Citations

Development of prediction models for quantification of total methane emission from enteric fermentation of young Holstein cattle at various ages

Jiao

Yan

Wills

et al. 2014

Agriculture, Ecosystems & Environment

View full text Add to dashboard Cite

“…The ME intake was a sum of ME requirement for maintenance (ME m ; MJ/d) and growth (ME g ; MJ/d) plus ME requirement for pregnancy (MJ/d) for pregnant heifers. The ME m was derived from Jiao et al (2013). The daily ME g (MJ/d) was calculated using NE energy requirement for growth (NE g ; MJ/d; Eq.…”

Section: Calculation Of Accumulated N and Organic Matter Excretionmentioning

confidence: 99%

Prediction of manure nitrogen and organic matter excretion for young Holstein cattle fed on grass silage-based diets1

Jiao

Yan

McDowell

2014

Journal of Animal Science

Self Cite

View full text Add to dashboard Cite

The objectives of the present study were to evaluate the effects of sex (steers vs. heifers) of young Holstein cattle on N and OM excretion in feces and urine and to use these data to develop prediction models for N and OM excretion. Data used were derived from a study with 20 autumn-born Holstein cattle (10 steers and 10 heifers) with N and OM intake and output measured at age of 6, 12, 18, and 22 mo, respectively. The cattle were offered a typical diet used on U.K. commercial farms containing a single grass silage mixed with concentrates. In each period, the cattle were housed as a single group in cubicle accommodation for the first 20 d, individually in metabolism units for the next 3 d, and then in calorimeter chambers for the final 5 d with feed intake, feces, and urine excretion measured during the final 4 d. Within each period, sex had no effect (P > 0.05) on N or OM intake or excretion or N utilization efficiency, with exceptions of steers having a greater intake of N (P = 0.036) and OM (P = 0.018) at age of 18 mo and a lower ratio of fecal N:N intake (P = 0.023) at age of 6 mo. A range of regression relationships (P < 0.05) were developed for prediction of N (g/d) and OM (kg/d) excretion in feces and urine. The present data were also used to calculate accumulated N and OM intake (kg) and excretion for the 2 sexes. Sex had no effects (P > 0.05) on accumulated N or OM intake or N or OM excretion in feces and urine or retained N and OM during the first or second year of life. On average for the 2 sexes at first and second year of age, the accumulated N excretions in feces were 11.4 and 21.1 kg and in urine 11.6 and 30.6 kg, respectively, and the corresponding values for accumulated OM excretions were respectively 241.5, 565.7, 30.3 and 81.5 kg. A number of equations were developed to predict accumulated N and OM excretion in feces and urine (kg) using BW (kg; P < 0.001, r(2) = 0.95 to 0.97). The accurate prediction of N and OM excretion in feces and urine is essential for reducing N pollution to ground and surface water and calculating methane and nitrous oxide emissions from manure management of dairy and beef production systems. These data can add novel information to the scientific literature and can be used to improve national inventories of manure N output and greenhouse gas emissions and to develop appropriate mitigation strategies for young Holstein cattle.

show abstract

Estimates of the maintenance energy requirement of beef cattle using respiration chamber data

Chen

Reynolds

Crompton

et al. 2023

Animal - science proceedings

View full text Add to dashboard Cite

Maintenance energy requirements of young Holstein cattle from calorimetric measurements at 6, 12, 18, and 22 months of age

Cited by 11 publications

References 31 publications

Development of prediction models for quantification of total methane emission from enteric fermentation of young Holstein cattle at various ages

Development of prediction models for quantification of total methane emission from enteric fermentation of young Holstein cattle at various ages

Prediction of manure nitrogen and organic matter excretion for young Holstein cattle fed on grass silage-based diets1

Estimates of the maintenance energy requirement of beef cattle using respiration chamber data

Contact Info

Product

Resources

About