Use this URL to cite or link to this record in EThOS:
Title: Supplementation of grazing dairy cows : effects on production, nutrient use efficiency and milk quality
Author: Reid, Michael Paul
ISNI:       0000 0004 5992 6801
Awarding Body: Queen's University Belfast
Current Institution: Queen's University Belfast
Date of Award: 2015
Availability of Full Text:
Full text unavailable from EThOS.
Please contact the current institution’s library for further details.
With the removal of milk quotas in Ireland in 2015, for the first time in 30 years, Irish dairy farmers will be able to increase milk production without the necessity to purchase additional milk quota rights. The aim is to increase milk production by 50% by 2020 compared to the 2007 - 2009 average. Increasing milk volume will challenge both farmers and processors alike. Ireland's milk production is characterised by a spring-calving system, to coincide with grass growth. Ireland ability to produce milk cheaply from grazed grass is considered as the main competitive advantage of Irish dairy farming compared to their European counterparts. In the spring and autumn, grass quantity, and/or quality, can be limiting, resulting in the requirement to supplement the diet with concentrates and forages. With the increase in milk production expected in the coming years, there will be increased demand for feed and supplementation in the Irish grass-based system. These supplementary feeds will have different effects on nitrogen utilisation efficiency, which can affect milk protein fractions and nitrogen excretion, which is important from an environmental perspective. Maximising the efficiency with which milk is processed into high-value dairy products is a clear objective for milk processing plants in Ireland. There is limited information on the effect that dairy cow diet has on milk protein components and milk processability. The objective of this thesis is to increase the knowledge that is available on the effect of supplementing spring-calving grazing dairy cows during times of limited grass availability and/or sub-optimal quality on milk production, nutrient use efficiency and milk processability.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available