The objective of the study is to investigate how an extended voluntary waiting period between calving and first insemination in primiparous cows would affect milk production and fertility during their first and second calving interval.

The data is registered between August 2018 to September 2021.

Data from 2 different sources. Access to these data is restricted due to the agreement with the principal owner of the data Växa Sverige.
1. Data (.txt files) from the Swedish Official Milk Recording System, operated by Växa Sverige regarding breed, calvings, inseminations, 305-d lactation yields, test-day yields, and dry-off dates from 16 farms. The inclusion criteria for the farms included herds with >100 dairy cows in production and a herd average milk production of at least 9 000 kg ECM/cow/year, a mean CI of < 14 months, and a system for daily milk yield registration.
2. Daily milk yields from the milking systems on the farms (three different types of systems: DeLaval, Lely and GEA), Excel files.

Metadata available:
One file with metadata, describing the data processing steps for each category of data, is provided. Also available are Code-lists for reading the data from the text files and for decoding the codes in the text files. R scripts with statistical calculations are also available.

Daily milk yields from the milking systems on the farms (three different types of systems: DeLaval, Lely, and GEA), Excel and CSV files. The majority of data is available, but there are holes with lacking information due to files not being sent from the farms before they were deleted from the milking systems.

Variables Farm-ID, cow-ID, date and time for milking, milk yield per milking (kg). Show less..

Data contains personal data

Yes

Type of personal data

Far identity number which can be connected to other personal information such as owner adress, contact details etc.

Code key exists

Yes

Language

English

Swedish

Method and outcome

Time period(s) investigated

2018-08-01 – 2021-09

Data format / data structure

Numeric

Species and taxons

Bos taurus taurus linnaeus, 1758

Data collection

Mode of collection: Physical measurements and tests
Description of the mode of collection: Daily milk yield have been collected by the milking systems on the farms (GEA,Lely and DeLaval)
Time period(s) for data collection: 2018-08-01 – 2021-09
Data collector: 16 commercial dairy farms
Instrument: Milking robot, milking parlour - Milking robots and prolours from GEA, Lely and DeLaval
Sample: Milk
Milk yield per milking
Source of the data: Registers/Records/Accounts: Administrative, Biological samples, Registers/Records/Accounts
Temporal resolution: 3 day

Geographic coverage

Geographic spread

Geographic location: Sweden

Geographic description: The farms where the data is collected is situated in the south of Sweden in Västergötland, Småland, Västmanland, Närke, Östergötland, Gotland, Uppland, Värmland, Södermanland and Dalsland.

Administrative information

Responsible department/unit

Department of Animal Nutrition and Management

Contributor(s)

Cecilia Kronqvist - Swedish University of Agricultural Sciences, Department och Animal Nutrition and Management

Kjell Holtenius - Swedish University of Agricultural Sciences, Department och Animal Nutrition and Management

Erling Strandberg - Swedish University of Agricultural Sciences, Department of Animal Breeding and Genetics

Renée Båge - Swedish University of Agricultural Sciences, Department of Clinical Sciences

Maria Åkerlind - Växa Sweden

Cecilia Kronqvist - Swedish University of Agricultural Sciences, Department och Animal Nutrition and Management

Kjell Holtenius - Swedish University of Agricultural Sciences, Department och Animal Nutrition and Management

Erling Strandberg - Swedish University of Agricultural Sciences, Department of Animal Breeding and Genetics

Renée Båge - Swedish University of Agricultural Sciences, Department of Clinical Sciences

Maria Åkerlind - Växa Sweden

Växa Sweden

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Funding

Funding agency: Swedish farmers’ foundation for agricultural research
Funding agency's reference number: O-17-20-957
Project name on the application: Individuellt anpassad laktationslängd för lönsam och hållbar mjölkproduktion

Ethics Review

Uppsala - Ref. Dnr 5.8.18-10126/2018

There is an apporved Ethical review application, but in this part of the project we have not used information that needed ethical approval, only collection of data.

Topic and keywords

Research area

Animal and dairy science (Standard för svensk indelning av forskningsämnen 2011)

Keywords

Milk production, Dairy cattle, Dairy cow, Dairy farm, Lactation, Extended, Extended lactation, Calving interval, Voluntary waiting period, Extended calving interval, Extended voluntary waiting period, Cow, Lactation yield

Publications