How is poultry feed intake calculated? A summary of calculation formulas
817 crossbred broiler:
Starting from the first day, increase by 2.5 grams per day. That is, the feed intake of 1000 817 crossbred broilers at 35 days of age is:
2.5g x 35d x 1000 birds ÷ 500 grams = 175 (jin)
[Simplified as: age in days x number of birds ÷ 200 = ? jin]
Large broiler: (simple)
The feed intake is 2 times that of the 817 crossbred broiler, increasing by 5 grams per day starting from the first day. That is, the feed intake of 1000 white-feathered broilers at 35 days of age is:
2.5g x 2 x 35d x 1000 birds ÷ 500 grams = 350 (jin)
[Simplified as: age in days x number of birds ÷ 100 = ? jin]
(detailed)
Fast-growing large broilers (based on Ross 308) (daily feed intake per bird, grams)
Before 10 days of age: daily feed intake increases by 4 grams per day. For example: a 7-day-old chick eats 28 grams per day.
11-20 days of age: (age in days - 2) ÷ 10 x 50 (grams). For example: at 15 days of age, (15-2) ÷ 10 x 50 = 65 (grams).
21-30 days of age: (age in days - 1) ÷ 10 x 50 (grams). For example: at 26 days of age, (26-1) ÷ 10 x 50 = 125 (grams).
30-40 days of age: age in days ÷ 10 x 50 (grams). For example: at 35 days of age, 35 ÷ 10 x 50 = 175 (grams).
After 40 days of age: basically maintained at 200 grams until slaughter.
The above is the daily feed intake per broiler. Under normal circumstances, when fed complete feed, each bird consumes a total of 4.5 kilograms of feed by slaughter, and the average weight can reach 2.5 kilograms. During routine farming, the flock should not exceed the feed intake for that day; if it exceeds it, the flock is considered abnormal, and the feed intake should be appropriately restricted during feeding management, otherwise the flock is prone to disease or difficult to control after disease onset.
Crossbred broiler
Daily feed intake per bird (g) = age in days x 2.2
Layer:
Daily feed intake per bird: (unit is g)
1-10 days, age in days + 2;
10-20 days, age in days + 1;
20-50 days, the number of days of age;
50-120 days, (age in days + 50) ÷ 2;
After 120 days of age, the daily feed intake is maintained between 100-120g.
That is, the feed intake of 1000 layers at 35 days of age is:
35 d x 1000 birds ÷ 500 grams = 70 (jin)
The actual feed intake of current breeds is slightly lower than what the formula calculates
Feeding according to the above calculation method, 1 hen consumes a cumulative total of 8.84 kilograms of feed by 150 days of age, and the annual feed consumption of a layer is 36.5 kilograms, which can basically meet the needs of egg production while also avoiding waste.
Meat duck:
Within 12 days of age --- 12 x age in days x number of birds / 1000 = daily feed intake (jin)
12-18 days of age ---- 15 x age in days x number of birds / 1000 = daily feed intake (jin)
After 18 days of age -- 18 x age in days x number of birds / 1000 = daily feed intake (jin)
Layer duck:
Each bird gets 2.5g on the first day, then increases by 2.5g per day thereafter;
Until 50 days of age, each bird eats 125g per day, about 150g after 90 days of age, then maintains this level, increasing in the late laying period.
Taking 1000 birds at 50 days as an example
Formula: 2.5g x 50d x 1000 birds ÷ 500g/jin = 250 (jin)
Broiler breeder:
36g at the end of the third week, then increases by 2-3g per week. After the start of laying, restrict feeding according to the specific conditions of the farm and the flock.
Calculation formulas for feed intake of other poultry
Green-legged partridge chicken, fast three-yellow chicken:
Refer to the formula for calculating the daily feed intake of 817 crossbred broilers.
Slow three-yellow: refer to the formula for calculating the daily feed intake of layers
Goose: refer to meat duck, but it is not very accurate, as geese eat coarse grains.
It is stated here that these poultry daily feed intake calculation formulas are for reference only. The actual feed intake of poultry under 20 days of age should be slightly less than what the formula gives, and the actual feed intake of poultry over 30 days of age should be slightly more than what the formula gives. Technicians should analyze according to the type of poultry flock and feeding conditions.