Genotype by nutrition interactions from Langhill dairy cows in three lactations

The economic pressures on the dairy industry may force more farmers to consider reducing the amount of concentrates fed to cows in order to keep costs down. We have been testing whether the long-term performance of daughters of sires progeny tested in high concentrate systems maintain their advantage over cows of average genetic merit when managed in a lower input feeding system. This paper extends the scope of our initial report (Chalmers et al., 1997) and includes data on reproductive performance.Data were from Holstein-Friesian cows managed at the Langhill Dairy Cattle Research Centre. Sires of the Selection (S) line are among the highest available in the UK for predicted transmitting abilities of weight of fat plus protein (PTA F+P). Sires of Control (C) line cows are about UK average for PTA F+P.

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A comparison of the reproductive performance of Holstein-Friesian and Norwegian Red dairy cattle on commercial dairy farms over five lactations

Proceedings of the British Society of Animal Science ◽

10.1017/s1752756200029008 ◽

2009 ◽

Vol 2009 ◽

pp. 61-61

Author(s):

C P Ferris ◽

D C Patterson ◽

D J Kilpatrick

Keyword(s):

Reproductive Performance ◽

Dairy Cow ◽

Farming Systems ◽

Dairy Farms ◽

Holstein Friesian ◽

Current Fertility ◽

Breed Selection ◽

The Uk ◽

Fertility Traits

Fertility traits have been included within breed selection programmes for the Norwegian Red (NR) dairy cow population in Norway for over thirty years. As a consequence, a 60 day non-return rate to first artificial insemination (AI) of 72.5% was recently calculated for NR cows in Norway (Garmo et al., 2008). In view of this long term breeding programme, and current fertility performance within Norway, there is considerable interest in the NR breed as a means of overcoming the high levels of infertility that currently exist within the Holstein-Friesian (HF) breed. However, farming systems within Norway are very different from those within the UK, with herd sizes in particular being much smaller. Thus an experiment was established on 19 commercial dairy farms to compare the fertility performance of cows of the NR and HF breeds.

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The Use of a Waste Conversion Index as a Long Term Performance Indicator for Civil Nuclear Laibilities

9th ASME International Conference on Radioactive Waste Management and Environmental Remediation: Volumes 1, 2, and 3 ◽

10.1115/icem2003-4952 ◽

2003 ◽

Cited By ~ 1

Author(s):

Pauline Fawcett ◽

David Spencer ◽

Richard Jarvis ◽

George Linekar

Keyword(s):

Performance Indicator ◽

White Paper ◽

Predictive Tool ◽

Hazard Reduction ◽

Reduction Strategies ◽

The Uk ◽

Long Term Performance ◽

Term Performance ◽

Waste Conversion

In November 2001 the UK Government issued a statement on the future management of public sector nuclear liabilities and in its white paper “Managing the nuclear legacy” proposed the establishment of a Liabilities Management Authority, or the Nuclear Decommissioning Authority (NDA) as it is now called. With the advent of the NDA, whose aim will be to safely and cost effectively reduce nuclear liabilities, and existing Government Policy which requires systematic and progressive reduction in hazard, there is a need for some form of index to demonstrate progress. Although there are many indices in use, mainly within the chemical industry, none of these are considered suitable for this purpose. A Waste Conversion Index is currently being developed to satisfy these needs. The Waste Conversion Index will reflect an emphasis on passive safety rather than the more traditional safety analysis which focuses on risk. It is intended to be applicable across all UK civil nuclear sites and may act as one of a number of long-term performance indicators. This paper describes how the index is formulated, and the various factors used in the calculation together with its main uses including its use as a predictive tool to demonstrate progressive hazard reduction as nuclear liabilities are reduced. In addition the paper warns against the misuse of the index as a sole means of decision making in developing hazard reduction strategies, prioritising projects and allocating funding. Finally, some examples are given of its application to existing facilities.

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Long-term performance of white clover cultivars oversown into summer-dry hill country

Proceedings of the New Zealand Grassland Association ◽

10.33584/jnzg.2001.63.2435 ◽

2001 ◽

pp. 85-89 ◽

Cited By ~ 2

Author(s):

M.B. Dodd ◽

G.W. Sheath ◽

M.E. Wedderburn ◽

I.S. Tarbotton

Keyword(s):

White Clover ◽

Research Centre ◽

First Year ◽

Allozyme Electrophoresis ◽

Hill Country ◽

Line Transects ◽

Long Term Performance ◽

Term Performance

The performance of three white clover cultivars (Huia, Tahora and Prop) was monitored in summerdry hill country at the Whatawhata Research Centre for 9 years. The cultivars were oversown into three steep north-aspect paddocks in autumn 1990. White clover abundance was measured every spring using line transects, and stolon fragments were sampled to determine the contribution of the cultivars to overall populations by allozyme electrophoresis on three occasions (1991, 1993, and 1994). White clover abundance declined from ~50% in the first year to ~4% in 1999. There were no significant differences in abundance between the three cultivar treatments after year 2. There were significant differences in the contribution of the cultivars to white clover populations after 5 years as follows: Huia 27%, Tahora 33% and Prop 56%. The implications of these results for introducing new white clover genotypes into summer-dry hill country are discussed. Keywords: 'Grasslands Huia', 'Grasslands Tahora', hill country, long-term, 'Prop', summerdry, white clover

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Hazardous and radioactive waste management: a case of dual standards?

Geological Society London Engineering Geology Special Publications ◽

10.1144/gsl.eng.1987.004.01.59 ◽

1987 ◽

Vol 4 (1) ◽

pp. 489-494

Author(s):

N. A. Chapman ◽

G. M. Williams

Keyword(s):

Site Investigation ◽

Nuclear Industry ◽

Similar Amount ◽

Toxic Wastes ◽

Recent Activity ◽

The Uk ◽

Long Term Performance ◽

Term Performance ◽

Landfill Disposal

AbstractThe recent activity by the UK Nuclear industry to investigate the safety of sites in shallow ground for the disposal of low level radioactive wastes has not surprisingly prompted comparison with landfill facilities in which toxic wastes are being deposited. The conclusion is that the level of site investigation, operation and long term performance assessment proposed for the radwaste sites is many orders of magnitude greater than that required by the regulatory authorities for landfills where the operators responsibility for the safety of the site virtually disappears once the last load of waste is tipped and the disposal licence lapses. Furthermore, the research budget for radwaste exceeds that for landfill disposal by a similar amount even though the risk from radwaste can be shown to be many times less than that from toxic wastes. Since the same government department is in charge of radwaste and landfill disposal, it seems that dual standards are operating, and that either the radwaste managers are being singled out for unfair scrutiny, or that insufficient attention is being directed at the real threat to the environment from 'antediluvian and ramshackle' landfill practices.

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