Evidence map›Paper›PMID 34189510›Full record

ArticleJournal of animal science and technology2021

Effects of photoperiod and light intensity on milk production and milk composition of dairy cows in automatic milking system.

Dong-Hyun Lim, Tae-Il Kim, Sung-Min Park, Kwang-Seok Ki, Younghoon Kim

Abstract read
In one paragraph

Article in Journal of animal science and technology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

7 citing papers in PubMed.

  1. Article
  2. Article
  3. Photoperiod Management in Farm Animal Husbandry: A Review.Animals : an open access journal from MDPI · 2025
    Review
  4. BioClocks UK: driving robust cycles of discovery to impact.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Review
  5. Review
  6. Article
  7. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Dong-Hyun LimDairy Science Division, National Institute of Animal Science, Rural Development Administration, Cheonan 31000, Korea.ORCID https://orcid.org/0000-0002-8575-0198
Tae-Il KimDairy Science Division, National Institute of Animal Science, Rural Development Administration, Cheonan 31000, Korea.ORCID https://orcid.org/0000-0003-0532-6010
Sung-Min ParkDairy Science Division, National Institute of Animal Science, Rural Development Administration, Cheonan 31000, Korea.ORCID https://orcid.org/0000-0001-9534-0216
Kwang-Seok KiDairy Science Division, National Institute of Animal Science, Rural Development Administration, Cheonan 31000, Korea.ORCID https://orcid.org/0000-0003-0971-1389
Younghoon KimDepartment of Agricultural Biotechnology and Research Institute of Agriculture and Life Science, Seoul National University, Seoul 08826, Korea.ORCID https://orcid.org/0000-0001-6769-0657

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The purpose of this study was to determine the effects of photoperiod and light intensity on milk production, milk composition, hormones levels and blood metabolites indices of Korean Holstein dairy cows in automatic milking system (AMS). A total of 24 Holstein dairy cows were selected and used to four subsequent treatments for the experimental periods of 60 days. The light programs consisted of (1) Control: the natural photoperiod with 14.2 h of the light period and 9.4 h of the dark period (below 10 Lux); (2) T1: 16 h of the long day photoperiod (LDPP) with 50 Lux of light; (3) T2: 16 h of LDPP with 100 Lux of light; and (4) T3: 16 h of LDPP with 200 Lux of light, respectively. Importantly, there was a significant difference in the thurl activity of dairy cows between the different light intensity programs (

Indexed as

Automatic milking systemLight intensityMelatoninMilk productionPhotoperiod

Identifiers

PMID34189510
PMCPMC8204001

What OpenQuestion holds

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LicenceCC BY-NC
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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.