Possibilities of low cost procedures for estimating milk yields. II. Reliability of the 305 days lactation yields

被引：0

作者：

Gernand, E ^{[1
]}

Recknagel, R ^{[1
]}

Heerbach, B ^{[1
]}

机构：

[1] Standort Clausberg, Abt Tierprod, Thuringer Landesanstalt Landwirtschaft, D-99817 Clausberg, Germany

来源：

ARCHIV FUR TIERZUCHT-ARCHIVES OF ANIMAL BREEDING | 1999年 / 42卷 / 02期

关键词：

alternate milk recording; lactation yield;

D O I：

10.5194/aab-42-117-1999

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

The increasing expenses of the dairy farmers and control association force's reduction of costs caused by estimating milk yield. As well considerable losses of accuracy are not to accept. Milk yield and contest are tested separate for morning and afternoon in two dairy farms with about 500 milking cows each 14 days. This allows the Simulation of different methods for estimating the lactation yield. By these several simulations of Methods for Estimating milk yields and contests are possible. This second Communication shows various variants of estimating total lactation yields (305 days) and their standard error by 168 lactations in two farms.

引用

页码：117 / 134

页数：18