Feed intake, milk production, and nutrient use efficiency with early lactating Norwegian Red dairy cows fed concentrates with varying levels of local ingredients
IF 1.9 3区 农林科学Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE
K.S. Eikanger , M. Eknæs , J.K. Sommerseth , I.J. Karlengen , I. Schei , M. Silberberg , A. Kidane
{"title":"Feed intake, milk production, and nutrient use efficiency with early lactating Norwegian Red dairy cows fed concentrates with varying levels of local ingredients","authors":"K.S. Eikanger , M. Eknæs , J.K. Sommerseth , I.J. Karlengen , I. Schei , M. Silberberg , A. Kidane","doi":"10.1016/j.livsci.2025.105790","DOIUrl":null,"url":null,"abstract":"<div><div>We evaluated the effects of replacing imported soya protein and carbohydrate ingredients in concentrate feeds with alkalised barley in dairy cow diets with grass silage as a basal diet. Eight multiparous early lactation Norwegian Red dairy (NRF) cows with an initial daily milk yield (MY±SD) of 30.5 ± 5.94 kg were used in a 4 × 4 replicated Latin square design experiment of four 35-day experimental periods. Four roughly isonitrogenous and isoenergetic diets were included: a positive control with a higher share of imported ingredients, including soya as a protein source (Soya-F), two concentrates including alkalised barley (Alka-diets), differing in pre-pelleting particle size (i.e., Alka fine = Alka-F, and Alka coarse = Alka-C), and a negative control with the same basal ingredients as the Alka-diets but with untreated barley and added feed-grade urea replacing the alkalised barley (Urea-F). Grass silage was offered ad libitum and concentrate requirement for individual cows was calculated based on Soya-F. The Soya-F was then quantitatively replaced by the other three concentrate feeds. Feed intake, nutrient digestibility, milk production, nutrient use efficiency, and serum metabolites were measured. Replacing Soya-F with Alka-diets did not affect feed intake, digestibility, and milk production. However, Alka-diets supported a greater milk yield than Urea-F, which in turn improved feed utilisation efficiency for Alka-diets without altered N efficiency. A coarser pre-pelleting structure of Alka-C resulted in a lower starch digestibility compared to Alka-F. In conclusion, alkaline-treated barley has the potential to replace soya in concentrates for NRF dairy cows without compromising production efficiency.</div></div>","PeriodicalId":18152,"journal":{"name":"Livestock Science","volume":"300 ","pages":"Article 105790"},"PeriodicalIF":1.9000,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Livestock Science","FirstCategoryId":"97","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1871141325001519","RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"AGRICULTURE, DAIRY & ANIMAL SCIENCE","Score":null,"Total":0}
引用次数: 0
Abstract
We evaluated the effects of replacing imported soya protein and carbohydrate ingredients in concentrate feeds with alkalised barley in dairy cow diets with grass silage as a basal diet. Eight multiparous early lactation Norwegian Red dairy (NRF) cows with an initial daily milk yield (MY±SD) of 30.5 ± 5.94 kg were used in a 4 × 4 replicated Latin square design experiment of four 35-day experimental periods. Four roughly isonitrogenous and isoenergetic diets were included: a positive control with a higher share of imported ingredients, including soya as a protein source (Soya-F), two concentrates including alkalised barley (Alka-diets), differing in pre-pelleting particle size (i.e., Alka fine = Alka-F, and Alka coarse = Alka-C), and a negative control with the same basal ingredients as the Alka-diets but with untreated barley and added feed-grade urea replacing the alkalised barley (Urea-F). Grass silage was offered ad libitum and concentrate requirement for individual cows was calculated based on Soya-F. The Soya-F was then quantitatively replaced by the other three concentrate feeds. Feed intake, nutrient digestibility, milk production, nutrient use efficiency, and serum metabolites were measured. Replacing Soya-F with Alka-diets did not affect feed intake, digestibility, and milk production. However, Alka-diets supported a greater milk yield than Urea-F, which in turn improved feed utilisation efficiency for Alka-diets without altered N efficiency. A coarser pre-pelleting structure of Alka-C resulted in a lower starch digestibility compared to Alka-F. In conclusion, alkaline-treated barley has the potential to replace soya in concentrates for NRF dairy cows without compromising production efficiency.
期刊介绍:
Livestock Science promotes the sound development of the livestock sector by publishing original, peer-reviewed research and review articles covering all aspects of this broad field. The journal welcomes submissions on the avant-garde areas of animal genetics, breeding, growth, reproduction, nutrition, physiology, and behaviour in addition to genetic resources, welfare, ethics, health, management and production systems. The high-quality content of this journal reflects the truly international nature of this broad area of research.