Estimation of the lactation curve of Chios ewes using a non-linear model

被引：0

作者：

Ligda, C ^{[1
]}

Gabrielidis, G ^{[1
]}

Papadopoulos, T ^{[1
]}

Georgoudis, A ^{[1
]}

机构：

[1] Aristotelian Univ Salonika, Fac Agr, Dept Anim Prod, GR-54006 Salonika, Greece

来源：

MILKING AND MILK PRODUCTION OF DAIRY SHEEP AND GOATS | 1999年 / 95期

关键词：

lactation curve; non-linear model; dairy sheep; Chios breed;

D O I：

暂无

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

Data from 7,329 lactation records of 1,033 Chios ewes from the Agricultural Research Station of Chalkidiki were fitted in a non-linear model, the parameters of which were estimated using an iterative procedure of non-linear regression. The estimated parameters were: a=657.81+/-17.77, b=1.04+/-0.015 and c=0.03+/-0.087. In addition, an analysis of variance showed that lactation number, litter size and season of lambing had a significant influence on the shape of the lactation curve. Lactation curves were plotted for each group and the total milk yield in any stage of the lactation period was calculated.

引用

页码：447 / 449

页数：3

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