If an animal consumes 5 kg dry matter and excretes 6 kg of faeces with 50% moisture, the digestibility coefficient will be?

ANN-0086

QUESTION

If an animal consumes 5 kg dry matter and excretes 6 kg of faeces with 50% moisture, the digestibility coefficient will be?

OPTIONS

(A) 50%
(B) 60%
(C) 40%
(D) None of the above

ANSWER

(C) 40%

EXPLANATION

Five kilograms of dry matter intake corresponds to 5 kg actual nutrient input, while 6 kg feces at 50% moisture contains 3 kg dry fecal matter. Therefore dry-matter digestibility = (5 − 3)/5 × 100 = 40%. Hence 40% is correct, while 50% and 60% are mathematically inconsistent with the stated data.

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