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Table 2 Physical characteristics of three total mixed rations containing three different sources of non-fiber carbohydrate

From: Effects of different sources of carbohydrates on intake, digestibility, chewing, and performance of Holstein dairy cows

Item Treatments1 SEM P value
B BC BB
Particle size distribution (material retain on each sieve, % of DM)
19 mm 9.7 10.1 9.8 0.732 0.213
8 mm 22.2 22.1 20.4 0.912 0.133
1.18 mm 34.4 34.2 36.9 1.648 0.422
Pan 33.7 33.6 32.9 0.641 0.455
Geometric mean, mm 3.85 3.92 3.80 0.692 0.087
Standard deviation of geometric mean 1.20 1.24 1.34 0.106 0.093
Physical effective factor    
pefm2 66.2 66.3 66.9 0.509 0.101
pef > 83 34.4 34.6 31.3 0.322 0.288
pef > 1.184 66.3 66.4 67.1 0.694 0.083
Physical effective NDF, % of DM
peNDFm 24 24 26 1.13 0.063
peNDF > 8 12 13 12 1.03 0.054
peNDF > 1.18 24 24 26 1.14 0.063
  1. 1Treatments were diets containing barley + basal diet (B), barley and corn + basal diet (BC), and barley and beet pulp + basal diet (BB).
  2. 2pefm = physically effective factor, based on DM retained on sieve 1.18 mm [13].
  3. 3pef>8 = physically effective factor, determined as the proportion of DM retained on sieves of the original version of Penn State particle separator [10].
  4. 4pef>1.18 = physically effective factor, determined as the proportion of DM retained on sieves of the new version of Penn State particle separator [11].
  5. 5The peNDF was calculated by multiplying NDF content of each portion on each sieve on each pef [13].