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No.64 (2017/12) >

 
Title :黒毛和種繁殖雌牛の産次数の違いが生産子牛の生時体重,セリ出荷日齢,日齢体重およびセリ出荷価格に及ぼす影響
Title alternative :Effects of parity number of Japanese black cattle on the calf weight, marketed age, weight and price
Authors :波平, 知之
上原, 一郎
村田, 正将
屋良, 朝宣
Authors alternative :Namihira, Tomoyuki
Uehara, Ichiro
Murata, Masahiro
Yara, Tomonori
Issue Date :28-Dec-2017
Abstract :This study was investigated to select a better replacement stock and culling out of breeding cattle considering the calf weight, marketed age, weight and price in relation to parity number of Japanese black cattle in Subtropical Field Science Center of University of the Ryukyus from 2006 to 2015. The calf weight (32.8 kg), marketed age (264.8 days) and weight (0.95kg) of calves were higher in the 6th parity than that in the 1st parity. Auction price of female calves was not significantly affected with the parity number, but price of male calves was significantly lower (p<0.05) in 11-12-13th parity. The highest price was 399,075 yen for female calves in the 8th parity and 504,538 yen for male calves in the 3rd parity. The marketed weight of calves in the 8th parity tended to be high which was 0.93 kg in female calves and 1.02 kg in male calves. These results suggested that a heifer delivered in the 6th parity could be selected for breeding cattle and old cattle over 9th parity should be culling out.
Type Local :紀要論文
ISSN :0370-4246
Publisher :琉球大学農学部
URI :http://hdl.handle.net/20.500.12000/40909
Citation :琉球大学農学部学術報告 = THE SCIENCE BULLETIN OF THE FACULTY OF AGRICULTURE UNIVERSITY OF THE RYUKYUS no.64 p.29 -31
Appears in Collections:No.64 (2017/12)

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