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. 2014 Nov;27(11):1615–1622. doi: 10.5713/ajas.2014.14305

Table 1.

Moisture concentrations in feed ingredients and a mixed diet determined by various oven-drying methods (Exp. 1)

Item Moisture (%) SEM p-value
Temperature (°C) 135 105 105 105 105 105 135°C 2 h1 105°C
Drying time (h) 21 32 6 9 12 15 vs 105°C 3 h2 vs 105°C3 Linear Quadratic 3 h vs others4
Ingredient
 Corn 12.3 11.9 12.0 12.1 12.2 12.1 0.07 <0.01 <0.01 0.03 0.29 0.04
 Soybean meal 10.7 10.3 10.4 10.4 10.5 10.5 0.03 <0.01 <0.01 <0.01 0.35 0.02
 DDGS5 12.0 9.3 10.0 10.5 10.9 11.2 0.06 <0.01 <0.01 <0.01 <0.01 <0.01
 Whey permeate 7.5 3.1 3.9 4.5 5.0 5.5 0.06 <0.01 <0.01 <0.01 <0.01 <0.01
 Whey powder 8.9 3.0 3.7 4.4 5.0 5.4 0.15 <0.01 <0.01 <0.01 0.13 <0.01
 SDPP5 7.8 7.5 7.6 7.5 7.6 7.3 0.04 <0.01 <0.01 0.07 <0.01 0.70
 Fish meal 8.1 7.7 7.8 7.8 7.9 7.7 0.02 <0.01 <0.01 0.36 <0.01 0.05
Mixed diet5
 Predictied6 10.3 7.9 8.4 8.7 9.0 9.2
 Measured 10.1 7.8 8.4 8.7 9.0 9.0
 Difference 0.2* 0.1 0.0 0.0 0.0 0.2* 0.04

SEM, standard error of the mean; DDGS, distillers dried grains with solubles; SDPP, spray-dried plasma protein.

1

An oven method drying at 135°C for 2 h (AOAC, 2005; method 930.15).

2

An oven method drying at 105°C for 3 h (Shreve et al., 2006; NFTA 2.2.2.5).

3

A comparison between an oven method drying at 135°C for 2 h and oven methods drying at 105°C for 3, 6, 9, 12, and 15 h.

4

A comparison between an oven method drying at 105°C for 3 h and oven methods drying at 105°C for 6, 9, 12, and 15 h.

5

The mixed diet contained corn 20%, soybean meal 10%, DDGS 30%, whey permeate 20%, whey powder 10%, SDPP 5%, and fish meal 5%.

6

Predicted weight loss-on-drying contents were calculated from the measured weight loss-on-drying contents of each ingredient.

*

Measured values differ from predicted values (p<0.05).