Nov. 15,1925 Net Energy Values of Alfalfa Hay and Alfalfa Meal 993 
The figures for heat production, however, when considered in 
relation to the amount of feed, are less satisfactory, that for Period 
VI being especially low, with the result that the loss of energy in 
this period was correspondingly low. 
THE HEAT INCREMENT 
The heat increment (Table VIII) is the increased heat production 
due to an increase in the amount of feed, and is expressed, in relation 
to the kilograms of dry matter of the increase in feed, as the heat 
increment. 
Table VIII. — Heat increment per kilogram of dry matter 
Feeding stuff 
Periods 
compared 
Heat incre¬ 
ment per 
kilogram 
dry matter 
Feeding stuff 
Periods 
compared 
Heat incre¬ 
ment per 
kilogram 
dry matter 
Alfalfa hay__ 
Do... 
Do.-_.. 
I and III— 
III and V— 
I and V_ 
Calories 
979 
1,080 
1,043 
Alfalfa meal. 
Do—. 
Do.. 
II and IV— 
IV and VI.. 
Hand VI— 
Calories 
934 
1,287 
In 160 
Averaee 
Average_ 
1,034 
1,127 
1 
With both the hay and the meal there are two high and one low 
heat-increment values, the high values being those affected by heat 
production in Periods V and VI, the two involving minimum feed 
intake. 
THE MAINTENANCE REQUIREMENT 
The maintenance requirement of energy is computed for each 
E eriod by subtracting from the heat production the product of the 
eat-increment value multiplied by the kilograms of dry matter of 
the feed, as indicated in Table IX. 
Table IX. — Maintenance requirement of net energy 
Dry matter eaten 
Average 
heat incre¬ 
Total heat 
Total heat 
production 
Net energy 
required 
for main¬ 
tenance 
Period No. 
Alfalfa 
hay 
Alfalfa 
meal 
ment per 
kilogram of 
dry matter 
increment 
of ration 
Treatment A: 
I... 
Kilograms 
6.6383 
Kilograms 
Calories 
1,034 
1,127 
Calories 
6,864 
7,518 
5,501 
6,095 
3,156 
3,556 
Calories 
11,134 
10,946 
9,843 
9,767 
7,394 
6,868 
Calories 
4,270 
3,428 
4,342 
3,672 
4,238 
3,312 
II.... 
6.6707 
TTT .... 
5.3203 
1,034 
1,127 
IV___ 
5.4078 
V.... 
3.0524 
1,034 
1,127 
VI.___ 
3.1549 
Average_ 
3,877 
Treatment B: 
I___ 
6.6383 
979 
6,499 
11,134 
9,843 
10,946 
4,635 
HI .. 
5. 3203 
979 
5,209 
6,230 
5,051 
II___ 
6.6707 
934 
4, 716 
IV___ 
5.4078 
934 
9,767 
Average._ 
4,676 
