Academic Journal
Predicting metabolizable energy from digestible energy for growing and finishing beef cattle and relationships to the prediction of methane
| العنوان: | Predicting metabolizable energy from digestible energy for growing and finishing beef cattle and relationships to the prediction of methane |
|---|---|
| المؤلفون: | Hales, Kristin E. (TTU), Coppin, Carley A. (TTU), Smith, Zachary K., McDaniel, Zach S. (TTU), Tedeschi, Luis O., Cole, N. Andy, Galyean, Michael L. (TTU) |
| سنة النشر: | 2022 |
| المجموعة: | Texas Tech University: TTU DSpace Repository |
| مصطلحات موضوعية: | beef cattle, digestible energy, metabolizable energy, methane prediction |
| الوصف: | © 2022 The Author(s) 2022. Published by Oxford University Press on behalf of the American Society of Animal Science. cc-by ; Reliable predictions of metabolizable energy (ME) from digestible energy (DE) are necessary to prescribe nutrient requirements of beef cattle accurately. A previously developed database that included 87 treatment means from 23 respiration calorimetry studies has been updated to evaluate the efficiency of converting DE to ME by adding 47 treatment means from 11 additional studies. Diets were fed to growing-finishing cattle under individual feeding conditions. A citation-adjusted linear regression equation was developed where dietary ME concentration (Mcal/kg of dry matter [DM]) was the dependent variable and dietary DE concentration (Mcal/kg) was the independent variable: ME = 1.0001 × DE - 0.3926; r2 = 0.99, root mean square prediction error [RMSPE] = 0.04, and P < 0.01 for the intercept and slope. The slope did not differ from unity (95% CI = 0.936 to 1.065); therefore, the intercept (95% CI = -0.567 to -0.218) defines the value of ME predicted from DE. For practical use, we recommend ME = DE - 0.39. Based on the relationship between DE and ME, we calculated the citation-adjusted loss of methane, which yielded a value of 0.2433 Mcal/kg of dry matter intake (DMI; SE = 0.0134). This value was also adjusted for the effects of DMI above maintenance, yielding a citation-adjusted relationship: CH4, Mcal/kg = 0.3344 - 0.05639 × multiple of maintenance; r2 = 0.536, RMSPE = 0.0245, and P < 0.01 for the intercept and slope. Both the 0.2433 value and the result of the intake-adjusted equation can be multiplied by DMI to yield an estimate of methane production. These two approaches were evaluated using a second, independent database comprising 129 data points from 29 published studies. Four equations in the literature that used DMI or intake energy to predict methane production also were evaluated with the second database. The mean bias was substantially greater for the two new equations, but ... |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | Hales, K.E., Coppin, C.A., Smith, Z.K., McDaniel, Z.S., Tedeschi, L.O., Cole, N.A., & Galyean, M.L. 2022. Predicting metabolizable energy from digestible energy for growing and finishing beef cattle and relationships to the prediction of methane. Journal of Animal Science, 100(3). https://doi.org/10.1093/jas/skac013; https://doi.org/10.1093/jas/skac013; https://hdl.handle.net/2346/92736 |
| DOI: | 10.1093/jas/skac013 |
| الاتاحة: | https://hdl.handle.net/2346/92736 https://doi.org/10.1093/jas/skac013 |
| رقم الانضمام: | edsbas.DB727DF6 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1093/jas/skac013 |
|---|