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RISS 인기검색어
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- 저자 : 김윤환 ( Chul Wook Kim (검색결과 2 건)
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홀스타인의 유량 , 유지율 및 유지량에 대한 유전 및 환경적 효과와 상호작용에 관한 연구
문점동,강봉태,김윤환,김철욱 ( Jeom Dong Moon,Bong Tae Kang,Youn Hwan Kim,Chul Wook Kim ) 한국축산학회 1983 한국축산학회지 Vol.25 No.5
This study was conducted to determine the main effects and interactions of parity, performance of milk production, season and lactation period on the daily average milk yield, the daily average fat percentage and the daily average fat yield in Holstein cows with the records of 953 of observation obtained at breeding livestock station, Gyeong Sang Nam Do from 1979 to 1981. The records were analysized by the least square method and the results obtained are summarized as follows: 1. The daily average milk yield and fat percentage of the 5-6th parity and the daily average fat wield of the 3-4th parity were significantly superior to those of the other groups. 2. The daily average milk yield and fat yield of 5100㎏ group, and daily average fat percentage of 4500㎏ and low group were highly superior to those of the other groups in the effect of performance of milk production. 3. The daily average milk yield, fat percentage and fat yield of Summer, Fall and Winter were higher than those of Spring in the effects of season and there were no significant (P$gt;.05) differences among Summer, Fall and Winter. 4. The daily average milk yield of 270 days and low was 17.34±.30㎏ and the daily average milk percentage of 270-310 days was 3.91±.03%, these were greatly superior to those of the other group in the effects of lactation period. 5. The interaction effects of performance of milk productionxseason and lactation period were highly significant (P$lt;.001) for the dally average milk yield and fat yield. 6. The effect of parity×performance of milk production was significant (P$lt;.001) and the effect of parity×lactation period was significant (P$lt;.05) for the daily average fat percentage.
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김철욱,정현승,김윤환 ( Chul Wook Kim,Hyun Sung Chung,Youn Hwan Kim ) 자 한국축산학회 1986 한국축산학회지 Vol.28 No.8
This study was conducted to estimate the correlation coefficient between pig weights by breeze, parity, furrowing season, duration of pregnancy and sea on the basis of the data obtained from total 2.498 pigs of Landrace, Berkshire and Yorkshire born from 1982 to 1983 at the livestock station, Gyeongsang Nam-do. The data were analyzed by the SPSS package program(Nie, 1975) and Miller`s method C 1983) and the results obtained were as follows: In correlation coefficients between pig weights by breed, the correlation coefficients between pig weight, at birth(PWB) and pig weight at 21 days(PW21) in Berkshire were significantly (p$lt;.05) higher than these in Yorkshire and PW21 in Berkshire seemed to increase more as PWB was heavier. though the correlation coefficient between PW21 and Pig weight at 56days(PW56) was not significantly different (P$lt;.05) between breeds, PW21 was more correlated with PW56 than PWB. In correlation coefficients between pig weighte by parity, the correlation coefficient between P1V13 and PW21 was significant different (p$lt;.05) between 7th parity and 1, 4, 5, and 8th parity groups, specially the correlation coefficient between PWB and PW21 in the 7th parity group was .5118, and there was the high correlation between PWB and PW21. The correlation coefficient between PW21 and PW56 was high in the other groups except the first parity and PW56 in parity seemed to increase more as PW21 was heavier. In correlation coefficients between pig weights by furrowing season, though the correlation coefficients between PWB and PW21 and PW56 were nonsignificant differences (p$lt;.051), the correlation coefficient between PW21 and PW56 was significantly (p$lt;.05) higher in the fall and winter-born groups than in the spring and summer born groups. In correlation coefficients between pig weights by duration of pregnancy, the correlation coefficient between PWB and PW21 was significantly different (p$lt;.05) between the 110 days group and the 111 days group and was not significant (p$lt;.05) between the other groups. The correlation coefficient between PWB and PW56 was significantly (p$lt;.05) higher with .6840 and .5935 in the 111 days and 119 days groups than in the other groups, and the correlation coefficient between PW21 and PW56 was significant differences (p$lt;.05) between the 112 days group and the 110 days groups. The correlation coefficient in the 112 days group was the highest with .7275. In correlation coefficients between pig weights by sex, the correlation coefficients between PWB and PW21 and PW56 were significantly (p$lt;.05) higher in the male group than in the female group. Specially, PW21 was more correlated with PW56 than PWB. From the results summarized as above, it could be inferred that PWB be more correlated with PW21 than PW56, and PW56 seem to increase more as PW21 was heavier because there was the more correlation between PW21 and PW56.
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