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RISS 인기검색어
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- 저자 : 김춘수 ( Bong K . Ohh (검색결과 1 건)
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오봉국,오세정,김춘수 ( Bong K . Ohh,Sae J . Oh,Chun S . Kim ) 한국축산학회 1979 한국축산학회지 Vol.21 No.5
Three Leghorn type and four brown egg type layers, 600 birds, were reared under three dietary restricted feeding systems and control during growing period (IO-20weeks of age)and also their productivities in laying period were observed from 8th June, 1977 to 1st March, 1978. Four different feeds were as follows : Control, High fiber feed containing much barley bran, Low protein feed consisting much amount of corn, and Barley (96%) feed. During rearing period this experiment was not observed significant differences among four treatments in viability but three restricted treatments showed less feed consumption and lower body gain due to lower quality of those feeds than control. And the feed requirement per unit body gain in barley treatment was observed especially low as reasonable re cult . In productivities followed by four different feeds during laying period, two restricted treatments, such as low protein and barley treatments except high fiber group, produced late their first egg, and all three restricted groups layed larger egg than control, which was indicated positive correlation between sexual maturity and egg weight. Production rate for short term until 48 weeks of age and laying intensity after peak production were greatly influenced by sexual maturity which was affected according to nutrition conditions of feed Therefore 79% and 75% of barley treatment in total production rate after peak production surpassed 7 and 3%, compared with control of white and coloured layers respectively. In this respects, this experiment found the most interested fact that restricted feed causing the change of fat tissues in growing chick could make efficient productivity, especially barley feed under Korea condition seemed to be able to increase egg production rate, lay large egg and require little feed intake All restricted layers consumed more feed and showed more body gain than control after feed restrictiction was cancelled at 20 weeks of age. The layers of barley treatment in low quality consumed 3.6g in white and 4.4g in coloured more than control in every day, being caused recover from unfavorable feed in growing. As shown above, restrict of feed quality in growing chick could meet with results of less feed consumption, higher egg production and larger egg resulted from laying intensity and delaying the first egg day contrast control. And in general tendency coloured layers seemed to be affected more variably than white in accordance with restricted treatment but 100% barley treatment of white and coloured layer during growing period were identified as the most efficient groups.
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