Replacing a permanent pasture and its effect in the first year on a commercial dairy farm

A - Papers appearing in refereed journals

Rivero-Viera, J., Orr, R. J., Coumbe, J., Willson, B., Evans, J. and Lee, M. R. F. 2018. Replacing a permanent pasture and its effect in the first year on a commercial dairy farm. Agro Sur. 46 (1), pp. 3-12.

AuthorsRivero-Viera, J., Orr, R. J., Coumbe, J., Willson, B., Evans, J. and Lee, M. R. F.
Abstract

The objective was to assess the impact of replacing a
permanent pasture with a reseeded pasture on system productivity and product quality in the first year of establishment under commercial conditions management. Dairy cows were allocated to treatment based on pasture availability at the start of the season following standard commercial practices. Seventy autumn-calved cows grazed a high sugar grass pasture (14.1 ha reseeded in September 2015) and 55 grazed a permanent pasture (12.1 ha) from April to June 2016. Pastures snip samples were taken to assess nutritional composition every two weeks. Milk production and composition was measured on 4th May and 10th June. A slightly higher content of water soluble carbohydrate was observed in May on the reseeded sward (27.1 vs. 25.8%) coinciding with a higher milk yield (24.6 vs. 22.9 L d-1 per cow), lactose content (4.41 vs. 4.34%), and a lower somatic cell account (59,400 vs. 113,300 cell mL-1), compared to the permanent pasture. Pasture varied in nutritional value across the study. In June, no differences in milk production or composition were observed. However, the reseeded sward was estimated to produce 12.3% more milk per ha than the permanent pasture during the experimental period (113.8 vs. 101.3 L ha-1 d-1), driven by the greater carrying capacity of the sward (5 vs. 4.5 LU ha-1). This farm case study shows the potential of a reseeded pasture to outperform permanent pasture even in the first year of establishment at a farm system scale.

KeywordsHigh sugar grass; Permanent pasture; Grazing dairy systems; Milk composition; Milk yield
Year of Publication2018
JournalAgro Sur
Journal citation46 (1), pp. 3-12
Web address (URL)http://agrosur-journal.cl/agrosur/wp-content/uploads/2018/09/art02-Rivero-PUBLICAR.pdf
Open accessPublished as bronze (free) open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeDEFRASIP
S2N - Soil to Nutrition - Work package 2 (WP2) - Adaptive management systems for improved efficiency and nutritional quality
ASSIST - Achieving Sustainable Agricultural Systems
Publisher's version
Copyright license
CC BY
File Access Level
Open
Output statusPublished
Publication dates
Online2018
Publication process dates
Accepted07 Jun 2018
Copyright licenseCC BY
PublisherFacultad de Ciencias Agrarias de la Universidad Austral de Chile
ISSN0719-4196

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