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이호준;정경섭;최은주;서경석;김경래;민관식;윤종택
- Proceedings of the KSAR Conference
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- 2004.06a
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- pp.248-248
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- 2004
농장의 효율적 경영을 위해서는 농장경영비의 절감과 농장 소득의 증대가 매우 필수적이며 소득증대를 위해 가축번식은 그 무엇보다도 중요하다 하겠다. 특히, 젖소에서는 번식효율이 낮을 경우 산자의 생산효율이 낮으며 우유생산량도 낮아져 농가경영을 위태롭게 할 수 있는 중요인자이다. 따라서 번식효율 증진에 관한 연구는 세계의 많은 연구자들에 의해 오랜 시간 동안 연구되어지고 있다. 또한 번식효율 증진을 위해 사양관리개선, 번식능력이 양호한 종모우의 선발, 배란촉진제 사용, hCG 주사, bST 투여 등의 연구가 활발하게 진행되어지고 있다. (중략)
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Jeong, Chan Sung;Jang, Sun Sik;Lee, Sung Sill;Moon, Yea Hwang
- Journal of agriculture & life science
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- v.50 no.4
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- pp.113-125
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- 2016
This study was conducted to investigate the effect of low feeding level of concentrate after sexual maturity(14 month old) on the growing and breeding performances in Hanwoo cows. Eighteen cows(average body wt. 251kg) were alloted to two groups by completely randomized design, and fed a commercial formula feed by 0.8%(T1) and 1.2%(T2) of body weight for 30 months of total experimental period(feeding trial of 20 months, breeding trial of 10 months). When the results of this experiment compared to the Korean feeding standard for Hanwoo(2012), the reason of low growing performance in T1 was induced from low protein intake rather than energy. The change of body size by feeding levels was significantly appeared at chest width and body length, particularly chest width of cows in T1 was rather reduced by 3.7% in the final than the initial measurement. Ovarian size of T1 was only 63% of T2, and pregnancy rate(33.3% : 77.8%) and birth wight of calf(22.5kg : 29.5kg) were also seriously repressed by low intake of dietary protein after sexual maturity in Hanwoo cow. It was appeared that the growing and breeding performances of Hanwoo cows were more affected by the level of dietary protein rather than energy in the feeding after sexual maturity.
https://doi.org/10.14397/jals.2016.50.4.113 인용