Effect of reducing daily herbage allowance during early lactation on composition and processing characteristics of milk from spring-calved herds

Arunima Gulati, Norann Galvin, Emer Kennedy, Eva Lewis, Jennifer J. McManus, Mark A. Fenelon, Timothy P. Guinee*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

2 Citations (Scopus)

Abstract

The study investigated the effects of reducing daily herbage allowance (DHA) from 15.0 to 11.8 kg dry matter per cow (>3.5 cm post grazing sward height) to a spring-calved herd during early lactation on the composition, rennet coagulability and heat stability characteristics of milk during early lactation (EL, 29–70 days in milk, DIM), mid lactation (ML, 78–183 DIM), and late lactation (LL, 205–267 DIM). Samples of milk were taken at approximate 10 d intervals during EL and at 1–3 week intervals during ML and LL. Reducing DHA led to reductions in milk yield, milk solids yield, and concentrations of protein (∼0.22%, w/w) and casein (0.13%, w/w) during EL. Otherwise, it had little effect on milk composition or on the selected processing characteristics in ML, LL or overall lactation. Stage of lactation resulted in comparatively large changes in most compositional parameters, rennet gelation and heat stability.

Original languageEnglish
Pages (from-to)69-76
Number of pages8
JournalInternational Dairy Journal
Volume92
Early online date30 Jan 2020
DOIs
Publication statusPublished - May 2020

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