The use of milk Fourier transform mid-infrared spectra and milk yield to estimate heat production as a measure of efficiency of dairy cows

Table 1 Ingredients, nutrient composition and energy content of the diets fed to the animals during the respiration chamber experiments

Item	Minimum	Maximum	Mean	Median	SD
Ingredients, g/kg of DM
Grass silage	500	915	692	680	81
Corn silage	238.0	452.5	360.0	375.0	93.3
Barley straw	42	423	214	259	93
Concentrate	4.6	27.9	17.7	17.8	3.4
Nutrient composition
DM, g/kg	353	941	529	388	235
NDF^a, g/kg of DM	275	497	377	377	51
ADF^b, g/kg of DM	146	254	197	197	23
Crude protein, g/kg of DM	122	171	152	155	13
Crude fat, g/kg of DM	24	33	30	30	2
Ash, g/kg of DM	38	135	71	69	19
ME^c, MJ/kg of DM	8.5	11.6	10.3	10.5	0.7

ISSN: 2049-1891