{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,7]],"date-time":"2026-07-07T09:28:52Z","timestamp":1783416532819,"version":"3.54.6"},"reference-count":34,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2021,5,28]],"date-time":"2021-05-28T00:00:00Z","timestamp":1622160000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100009882","name":"Regione Lombardia","doi-asserted-by":"publisher","award":["AGRIHUB id 1148574"],"award-info":[{"award-number":["AGRIHUB id 1148574"]}],"id":[{"id":"10.13039\/501100009882","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100005401","name":"Ministero delle Politiche Agricole Alimentari e Forestali","doi-asserted-by":"publisher","award":["AGRIDIGIT, subproject  PLF4Milk (D.M. 36507\/7305\/2018 del 20\/12\/2018)"],"award-info":[{"award-number":["AGRIDIGIT, subproject  PLF4Milk (D.M. 36507\/7305\/2018 del 20\/12\/2018)"]}],"id":[{"id":"10.13039\/501100005401","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Animals"],"abstract":"<jats:p>The study aimed to estimate the components of rumination time (RT) variability recorded by a neck collar sensor and the relationship between RT and milk composition. Milk test day (TD) and RT data were collected from 691 cows in three farms. Daily RT data of each animal were averaged for 3, 7, and 10 days preceding the TD date (RTD). Variance component analysis of RTD, considering the effects of farm, cow, parity, TD date, and lactation phase, showed that a farm, followed by a cow, had major contributions to the total variability. The RT10 variable best performed on TD milk yield and quality records across models by a multi-model inference approach and was adopted to study its relationship with milk traits, by linear mixed models, through a 3-level stratification: low (LRT10 \u2264 8 h\/day), medium (8 h\/day &lt; MRT10 \u2264 9 h\/day), and high (HRT10 &gt; 9 h\/day) RT. Cows with HRT10 had greater milk, fat, protein, casein, and lactose daily yield, and lower fat, protein, casein contents, and fat to protein ratio compared to MRT10 and LRT10. Higher percentages of saturated fatty acid and lower unsaturated and monounsaturated fatty acid were found in HRT10, with respect to LRT10 and MRT10 observations.<\/jats:p>","DOI":"10.3390\/ani11061583","type":"journal-article","created":{"date-parts":[[2021,5,28]],"date-time":"2021-05-28T11:33:20Z","timestamp":1622201600000},"page":"1583","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Unraveling the Relationship between Milk Yield and Quality at the Test Day with Rumination Time Recorded by a PLF Technology"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5868-6696","authenticated-orcid":false,"given":"Rosanna","family":"Marino","sequence":"first","affiliation":[{"name":"Centro di Ricerca Zootecnia e Acquacoltura, Consiglio per la Ricerca in Agricoltura e L\u2019analisi Dell\u2019economia Agraria (CREA), via Lombardo 11, 26900 Lodi, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3066-7618","authenticated-orcid":false,"given":"Francesca","family":"Petrera","sequence":"additional","affiliation":[{"name":"Centro di Ricerca Zootecnia e Acquacoltura, Consiglio per la Ricerca in Agricoltura e L\u2019analisi Dell\u2019economia Agraria (CREA), via Lombardo 11, 26900 Lodi, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4372-9558","authenticated-orcid":false,"given":"Marisanna","family":"Speroni","sequence":"additional","affiliation":[{"name":"Centro di Ricerca Zootecnia e Acquacoltura, Consiglio per la Ricerca in Agricoltura e L\u2019analisi Dell\u2019economia Agraria (CREA), via Lombardo 11, 26900 Lodi, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Teresa","family":"Rutigliano","sequence":"additional","affiliation":[{"name":"Centro di Ricerca Zootecnia e Acquacoltura, Consiglio per la Ricerca in Agricoltura e L\u2019analisi Dell\u2019economia Agraria (CREA), via Lombardo 11, 26900 Lodi, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrea","family":"Galli","sequence":"additional","affiliation":[{"name":"Centro di Ricerca Zootecnia e Acquacoltura, Consiglio per la Ricerca in Agricoltura e L\u2019analisi Dell\u2019economia Agraria (CREA), via Lombardo 11, 26900 Lodi, Italy"},{"name":"Associazione Regionale Allevatori Lombardia (ARAL), via Kennedy 30, 26013 Crema, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7747-1308","authenticated-orcid":false,"given":"Fabio","family":"Abeni","sequence":"additional","affiliation":[{"name":"Centro di Ricerca Zootecnia e Acquacoltura, Consiglio per la Ricerca in Agricoltura e L\u2019analisi Dell\u2019economia Agraria (CREA), via Lombardo 11, 26900 Lodi, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,5,28]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"5756","DOI":"10.3168\/jds.2018-15711","article-title":"Symposium review: Challenges and opportunities for evaluating and using the genetic potential of dairy cattle in the new era of sensor data from automation","volume":"102","author":"Gengler","year":"2019","journal-title":"J. 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