摘要
[目的]文章旨在对元江本地黄牛在不同饲养方式下的体重和体尺等性状进行分析,研究其生长发育规律并构建通过体尺预测体重的回归方程。[方法]研究随机选取规模牛场舍饲饲养的本地黄牛以及牛场周边农户放牧饲养的本地黄牛各20头、公母各10头,从初生到12月龄逐月测定体重体尺,并拟合适宜的生长发育模型、体重与体尺指标及月龄的回归模型。[结果]研究结果显示,(1)Gompertz、Logistic、Von Bertalanffy、Brody 4种模型拟合肉牛体重的拟合度R2均较高,其中以Logistic模型最优。本地放牧黄牛和舍饲黄牛公牛增长拐点月龄分别为4.75月、5.23月,拐点体重分别为70.23 kg、101.28 kg;(2)元江本地放牧及舍饲黄牛公母牛体重、体尺与月龄之间均呈极显著相关(P<0.01)。(3)元江本地黄牛放牧及舍饲公母两组牛体重、体尺与月龄之间均呈极显著相关(P<0.01),多元线性回归方程中,月龄的回归系数都大于其余性状的回归系数。[结论]元江本地黄牛体重生长曲线的拟合以Logistic模型最优;两组牛体重、体尺与月龄之间均呈极显著相关,五元线性回归方程中月龄的回归系数都大于体尺性状的回归系数,其次体尺性状中管围也有很高的回归系数。
[Objective]The purpose of this paper is to analyze the body weight and body size of local yellow cattle in Yuanjiang under different feeding methods,study their growth and development laws,and build a regression equation for predicting body weight by body size.[Method]In this study,20 local yellow cattle were raised on the large-scale cattle farm and 10 male and 10 female cattle raised by farmers around the cattle farm were randomly selected.The body weight and body size were measured from birth to 12 months old,and the appropriate growth and development model,body weight and body size index,and regression model of months old were fitted.[Result]The results show that:(1)the fitting degree R2 of Gompertz,Logistic,Von Bertalanffy,and Brody models to beef cattle body weight is high,and the logistic model is the best.The growth turning point months of local grazing cattle and house fed cattle were 4.75 and 5.23 respectively,and the turning point weights were 70.23 kg and 101.28 kg respectively.(2)There was a significant correlation between the body weight,body size,and the age of the cattle(P<0.01).(3)There was a significant correlation between the body weight,body size,and the month age of the two groups of Yuanjiang local yellow cattle grazing and house feeding(P<0.01).In the multiple linear regression equation,the regression coefficient of the month age was greater than that of the other traits.[Conclusion]The logistic model is the best for fitting the body weight growth curve of Yuanjiang local yellow cattle.There was a significant correlation between body weight,body size,and month age in the two groups.The regression coefficient of month age in the five linear regression equation was greater than that of body size,and the regression coefficient of tube circumference in body size was also very high.
作者
孙峰
龚国安
龙云发
温昌饶
金福况
杨菊琴
白来章
杨灼雄
SUN Feng;GONG Guo-an;LONG Yun-fa;WEN Chang-rao;JIN Fu-kuang;YANG Ju-qin;BAI Lai-zhang;YANG Zhuo-xiong(Animal Husbandry and Forage Feed Station of Yuanjiang County,Yuanjiang,Yunnan 653300;Nanuo Township Agricultural and Rural Comprehensive Service Center,Yuanjiang,Yunnan 653305;Mili Township Agricultural and Rural Comprehensive Service Center,Yuanjiang,Yunnan 653303;Manlai Town Agricultural and Rural Comprehensive Service Center,Yuanjiang,Yunnan 6533001;Agricultural and Rural Comprehensive Service Center of Ganzhuang Street,Yuanjiang,Yunnan 653399;Yuxi Animal Husbandry Station,Yuxi,Yunnan 653100)
出处
《中国牛业科学》
2022年第6期5-9,共5页
China Cattle Science
关键词
元江本地黄牛
饲养方式
生长曲线
线性回归
local scalpers in Yuanjiang
feeding method
growth curve
linear regression
