Studies on the Grower Diet for Meat-type Pullet:IV. Effect of Feeding Programms of Skip-a-day in Two or Three Days
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One hundred and twenty four White Cornish pullets and 476 White Plymouth Rock pullets were reared in 5 Prefectural Poultry Experiment Stations to study corraboratively the effect of feeding programs of skip-a-day in 3 days or in 2 days on the production of hatchable eggs by meat-type hens. Five stations were separated into 2 groups. In the first group, duplicated lots of 8-week-old pullets were reared under the 3 different feeding programs, i.e. ad libitum feeding, skip-a-day in 3 days (abbreviated as 1/3 restriction) and skip-a-day in 2 days or alternative feeding (abbreviated as 1/2 restriction), feeding replacer diet from 8- to 24- week-old, then swithcing to layer diet until 52-week-old. In the second group, each lot of 8-week-old pullets were reared either on ad libitum feeding program or 1/3 restriction program, feeding replacer diet until 24-week-old then switching to layer diet until 48-week-old.1) Both 1/2 and 1/3 restriction programs resulted in better health of pullets with significantly higher viability (5% level) during the production period than of pullets on ad libitum feeding program.2) Hens on alternative feeding program (1/2 restriction) throughout both growing and laying periods took 9% less layer diet resulting in 11% less adult body weight than those of hens on the ad libitum feeding program, while the hatchable egg production was 8% higher than that of the control. Smaller adult size and less feed intake with higher egg production of hens on 1/2 restriction program cut the feed cost per hatchable egg on this program to 10% less than that on ad libitum feeding program, though the difference was not statistically significant.3) feeding program of 1/3 restriction throughout both growing and laying periods resulted in 5% less feed intake of hens and 7% less adult size than the ad libitum feeding program did, while little difference in hatchable egg production was observed. In general, performance of hens on 1/3 restriction program was betyeen those on ad libitum feeding program and 1/2 restriction program.
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