A prospective study of calf factors affecting first-lactation and lifetime milk production and age of cows when removed from the herd1

Arlyn Judson Heinrichs, B. S. Heinrichs

Research output: Contribution to journalArticle

82 Citations (Scopus)

Abstract

This prospective study was designed to investigate possible carryover effects of calf management practices and how events occurring during the first 16 wk of life affect first-lactation and lifetime milk production as well as age when animals are removed from production. This is the final of 3 stages in a longitudinal study that encompassed 10 yr of data collection. First, management and nutritional data were collected in the first 16 wk of life. The second part of this study evaluated conditions of animals at the time of first calving as affected by calf management, nutrition, and health. Both of these studies have been previously reported. This third portion covers the same calf effects on lactation performance and age at culling. Observations for the current study were collected from on-farm and Dairy Herd Improvement records. The multiple imputation technique was used in this analysis to avoid bias due to missing data. This study concluded that delivery score, weaning dry matter intake, days of illness before 4 mo, days treated before 4 mo, and body weight at first calving all had significant effects on first-lactation production of Holsteins. Delivery score and grain intake at a young age affected lifetime production. Age at culling was only affected by early grain intake in this study.

Original languageEnglish (US)
Pages (from-to)336-341
Number of pages6
JournalJournal of dairy science
Volume94
Issue number1
DOIs
StatePublished - Jan 1 2011

Fingerprint

prospective studies
Lactation
milk production
culling (animals)
Milk
lactation
calves
Prospective Studies
cows
calving
herd improvement
Sick Leave
Practice Management
animal age
longitudinal studies
Weaning
dairy herds
dry matter intake
Longitudinal Studies
weaning

All Science Journal Classification (ASJC) codes

  • Food Science
  • Animal Science and Zoology
  • Genetics

Cite this

@article{93afa25ceba7446d92fc1a183ee9639e,
title = "A prospective study of calf factors affecting first-lactation and lifetime milk production and age of cows when removed from the herd1",
abstract = "This prospective study was designed to investigate possible carryover effects of calf management practices and how events occurring during the first 16 wk of life affect first-lactation and lifetime milk production as well as age when animals are removed from production. This is the final of 3 stages in a longitudinal study that encompassed 10 yr of data collection. First, management and nutritional data were collected in the first 16 wk of life. The second part of this study evaluated conditions of animals at the time of first calving as affected by calf management, nutrition, and health. Both of these studies have been previously reported. This third portion covers the same calf effects on lactation performance and age at culling. Observations for the current study were collected from on-farm and Dairy Herd Improvement records. The multiple imputation technique was used in this analysis to avoid bias due to missing data. This study concluded that delivery score, weaning dry matter intake, days of illness before 4 mo, days treated before 4 mo, and body weight at first calving all had significant effects on first-lactation production of Holsteins. Delivery score and grain intake at a young age affected lifetime production. Age at culling was only affected by early grain intake in this study.",
author = "Heinrichs, {Arlyn Judson} and Heinrichs, {B. S.}",
year = "2011",
month = "1",
day = "1",
doi = "10.3168/jds.2010-3170",
language = "English (US)",
volume = "94",
pages = "336--341",
journal = "Journal of Dairy Science",
issn = "0022-0302",
publisher = "Elsevier Limited",
number = "1",

}

TY - JOUR

T1 - A prospective study of calf factors affecting first-lactation and lifetime milk production and age of cows when removed from the herd1

AU - Heinrichs, Arlyn Judson

AU - Heinrichs, B. S.

PY - 2011/1/1

Y1 - 2011/1/1

N2 - This prospective study was designed to investigate possible carryover effects of calf management practices and how events occurring during the first 16 wk of life affect first-lactation and lifetime milk production as well as age when animals are removed from production. This is the final of 3 stages in a longitudinal study that encompassed 10 yr of data collection. First, management and nutritional data were collected in the first 16 wk of life. The second part of this study evaluated conditions of animals at the time of first calving as affected by calf management, nutrition, and health. Both of these studies have been previously reported. This third portion covers the same calf effects on lactation performance and age at culling. Observations for the current study were collected from on-farm and Dairy Herd Improvement records. The multiple imputation technique was used in this analysis to avoid bias due to missing data. This study concluded that delivery score, weaning dry matter intake, days of illness before 4 mo, days treated before 4 mo, and body weight at first calving all had significant effects on first-lactation production of Holsteins. Delivery score and grain intake at a young age affected lifetime production. Age at culling was only affected by early grain intake in this study.

AB - This prospective study was designed to investigate possible carryover effects of calf management practices and how events occurring during the first 16 wk of life affect first-lactation and lifetime milk production as well as age when animals are removed from production. This is the final of 3 stages in a longitudinal study that encompassed 10 yr of data collection. First, management and nutritional data were collected in the first 16 wk of life. The second part of this study evaluated conditions of animals at the time of first calving as affected by calf management, nutrition, and health. Both of these studies have been previously reported. This third portion covers the same calf effects on lactation performance and age at culling. Observations for the current study were collected from on-farm and Dairy Herd Improvement records. The multiple imputation technique was used in this analysis to avoid bias due to missing data. This study concluded that delivery score, weaning dry matter intake, days of illness before 4 mo, days treated before 4 mo, and body weight at first calving all had significant effects on first-lactation production of Holsteins. Delivery score and grain intake at a young age affected lifetime production. Age at culling was only affected by early grain intake in this study.

UR - http://www.scopus.com/inward/record.url?scp=78650354065&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=78650354065&partnerID=8YFLogxK

U2 - 10.3168/jds.2010-3170

DO - 10.3168/jds.2010-3170

M3 - Article

C2 - 21183043

AN - SCOPUS:78650354065

VL - 94

SP - 336

EP - 341

JO - Journal of Dairy Science

JF - Journal of Dairy Science

SN - 0022-0302

IS - 1

ER -