Blog
About

123
views
0
recommends
+1 Recommend
1 collections
    1
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Performance and nutrient utilisation of dairy cows offered silages produced from three successive harvests of either a red clover–perennial ryegrass sward or a perennial ryegrass sward

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          The need to reduce reliance on imported protein feeds within the UK and Ireland has stimulated interest in locally grown forage legume crops, including red clover ( Trifolium pratense L.). This 13-wk study examined the performance of 28 dairy cows offered silages produced from three successive harvests (H) of either a pure grass sward (GS) receiving 315 kg N/ha per annum or a red clover–perennial ryegrass sward (RCGS) receiving 22 kg N/ha per annum. The crops of H1, H2 and H3 were wilted for 48, 72 and 72 h, respectively. Silages from H1, H2 and H3 were offered for 5, 5 and 3 wk, respectively, with cows supplemented with 8.0 kg concentrate/d throughout the experiment. Digestibility of DM and the effectively degradable protein content were lower, while protein degradability was higher, for RCGS than for GS. Silage DM intakes (DMIs) were higher for RCGS than for GS at H1 and H2, with no differences at H3. Milk yield was higher with RCGS than with GS at H3, with no differences at H1 and H2. Milk fat and milk protein contents were lower with RCGS than with GS at H3 but did not differ at H1 and H2. Faecal N/N intake was higher in the RCGS group than in the GS group at H1, with no differences at H2 and H3. Gross energy digestibility was lower for RCGS than for GS at H2. Although cow performance was higher with RCGS treatment, the responses were variable between harvests, largely reflecting the changing proportion of RC in the swards as the season progressed.

          Related collections

          Most cited references 54

          • Record: found
          • Abstract: not found
          • Article: not found

          The Dutch protein evaluation system: the DVE/OEB-system

            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found

            A Body Condition Scoring Chart for Holstein Dairy Cows

              Bookmark
              • Record: found
              • Abstract: not found
              • Article: not found

              A review of efficiency of nitrogen utilisation in lactating dairy cows and its relationship with environmental pollution

                Bookmark

                Author and article information

                Journal
                ijafr
                ijafr
                Irish Journal of Agricultural and Food Research
                IJAFR
                Compuscript (Ireland )
                0791-6833
                30 November 2020
                Affiliations
                1Agri-Food and Biosciences Institute, Sustainable Agri-Food Sciences Division, Large Park, Hillsborough, County Down, Northern Ireland, BT26 6DR, UK
                2Queens University Belfast, University Road, Belfast, Northern Ireland, BT7 1NN, UK
                Author notes
                †Corresponding author: D.J. Johnston, E-mail: djohnston35@ 123456qub.ac.uk
                Article
                10.15212/ijafr-2020-0106
                Copyright © 2020 Johnston, Laidlaw, Theodoridou, and Ferris

                This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivs license CC BY-NC-ND 3.0 IE.

                Page count
                Tables: 6, References: 56, Pages: 14
                Product
                Categories
                Original Study

                Comments

                Comment on this article