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当前位置: 首页 > 文章 > 用Wood模型拟合长三角地区中国荷斯坦牛产奶量及乳成分变化曲线 动物营养学报 2018 (6) 2136-2142
Position: Home > Articles > Fitting of Changing Curves of Milk Yield and Milk Composition of Chinese Holstein Dairy Cows in Yangtze River Delta using Wood's Model Chinese Journal of Animal Nutrition 2018 (6) 2136-2142

用Wood模型拟合长三角地区中国荷斯坦牛产奶量及乳成分变化曲线

作  者：
孙先枝;安朋朋;郭美;孙咏梅;金婷;刘光磊
单  位：
上海奶牛育种中心有限公司;光明牧业有限公司
关键词：
Wood模型;产奶量;乳成分;体细胞评分;泌乳曲线;长三角地区中国荷斯坦牛
摘  要：
本研究旨在采用Wood模型拟合长三角地区中国荷斯坦牛产奶量、乳脂率、乳蛋白率和乳中体细胞评分(SCS)的变化曲线。以长三角地区10个大中型牧场中国荷斯坦牛(1~3胎)的104 368条数据为基础,利用Wood模型对产奶量、乳脂率、乳蛋白率和乳中SCS数据进行曲线拟合。结果表明:1)中国荷斯坦牛产奶量为标准泌乳曲线,而乳脂率、乳蛋白率和乳中SCS变化则为倒抛物线形。2)Wood模型对产奶量的拟合度最高,各胎次均在0.98以上,其次为乳中SCS,各胎次的拟合度均在0.93以上,而各胎次的乳脂率的拟合度也均在0.92以上。3)1、2胎产奶量高峰出现时间与乳中SCS最低值出现时间相近,而乳脂率最低值出现时间相对较晚。4)1胎高峰产奶量(32.426 3 kg/d)较2、3胎低,而1胎维持高产奶量(4.98)及乳蛋白率的持续力(4.19)较2、3胎强。综合各指标可以得出,Wood模型适用于长三角地区中国荷斯坦牛产奶量、乳脂率、乳蛋白率及乳中SCS变化曲线的拟合。
译  名：
Fitting of Changing Curves of Milk Yield and Milk Composition of Chinese Holstein Dairy Cows in Yangtze River Delta using Wood's Model
作  者：
SUN Xianzhi;AN Pengpeng;GUO Mei;SUN Yongmei;JIN Ting;LIU Guanglei;Shanghai Dairy Cow Breeding Center Co.,Ltd.;Guangming Animal Husbandry Co.,Ltd.;
关键词：
Wood's model;;milk yield;;milk composition;;somatic cell score;;lactation curve;;Chinese Holstein dairy cows in Yangtze river delta
摘  要：
This study aimed to fit the changing curves of milk yield,milk fat percentage,milk protein percentage and milk somatic cell score( SCS) of Chinese Holstein dairy cows in Yangtze river delta using Wood's model. Data at the amount of 104 368 was collected from ten medium or large size farms of Chinese Holstein dairy cows( first to third parities) in Yangtze river delta,and Wood's model was used to fit the changing curves of milk yield,milk fat percentage,milk protein percentage and milk somatic cell score. The results showed as follows: 1) the curve of milk yield of Chinese Holstein dairy cows was the standard lactation curve,and the curves of milk fat percentage,milk protein percentage and milk SCS showed the reversed parabola shape. 2) The goodness of fit was above 0.98 for milk yield of different parities,then following with that of milk SCS of different parities,which was above 0.93,and the goodness of fit was above 0.92 for milk fat percentage of different parities. 3) The time of peak milk yield of the first and second parities was close to that reaching the lowest milk SCS,and the lowest milk fat percentage appeared relatively late. 4) The peak milk yield of the first parity( 32.426 3 kg/d) was lower than that of the second and third parities,while the persistence of keeping high milk yield( 4.98) and milk protein percentage( 4.19) of the first parity was higher than those of the second and third parities. It can be concluded that Wood's model is suitable for fitting of curves of milk yield,milk fat percentage,milk protein percentage and milk SCS of Chinese Holstein dairy cows in Yangtze river delta.

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