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原汁原味的英文資料，與大家一起分享！
The energy requirement for maintenance is directly related to metabolic body weight0.75. The energy requirement for growing pigs is about 3.6-3.8 times more than maintain, and about 3.2-3.4 of finishing pigs.
Metabolic body weight can be determined on a hand calculator by multiplying pounds by 0.454; then cube the result and calculate the square root twice. For a 100 ib pig. The metabolic body weight is 100*0.454=45.4kg, 45.4*45.4*45.4 = 93.577,
Thus the maintains requirement for a 100 Ib pig is 110*17.5 = 1925 kcal of DE per day.
Source：Digestive physiology of pigs
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