Table 6.
RQ method; daily energy balance (kJ/kg BW0.75 day) of 8 lactating Murciano-Granadina goats fed HAY (n = 4) or SIL (n = 4) diets.
| Item 1 | Diet 2 | S.E.M. 3 | p-Value | |
|---|---|---|---|---|
| HAY | SIL | |||
| Intake, g/kg BW0.75 | 110.1 | 81.8 | 6.33 | 0.013 |
| GEI | 1866 | 1392 | 107.2 | 0.015 |
| Efeces | 586 | 461 | 34.9 | 0.069 |
| Eurine | 41 | 32 | 4,7 | 0.363 |
| Emethane | 93 | 77 | 6.0 | 0.048 |
| MEI | 1146 | 822 | 75.3 | 0.011 |
| Emilk | 477 | 403 | 38.3 | 0.364 |
| O2, L/h | 22.0 | 20.7 | 1.10 | 0.572 |
| CO2, L/h | 20.9 | 19.5 | 1.04 | 0.530 |
| CH4, L/h | 1.54 | 1.25 | 0.091 | 0.0481 |
| RQ | 0.95 | 0.94 | 0.014 | 0.809 |
| HPRQ | 699 | 671 | 36.0 | 0.737 |
| REbody | -30 | -252 | 69.2 | 0.075 |
1 GEI = gross energy intake; Efeces = energy losses in feces; Eurine = energy losses in urine; Emethane = energy losses in methane; MEI = metabolizable energy intake; Emilk = energy in milk; RQ = respiration quotient; HPRQ = heat production according to RQ method; REmilk = recovered energy in milk; REbody = recovered energy in tissue (REbody = MEI − HP − Emilk); kl = efficiency of use of ME for milk production. 2 Diets were composed of 40% forage (either alfalfa hay [HAY] or alfalfa silage [SIL]) and 60% of concentrate. 3 S.E.M. = standard error of the mean.