Tony Waterhouse

Hydrogen and methane emissions from beef cattle and their rumen microbial community vary with diet, time after feeding and genotype.

The aims of the present study were to quantify hydrogen (H2) and methane (CH4) emissions from beef cattle under different dietary conditions and to assess how cattle genotype and rumen microbial community affected these emissions. A total of thirty-six Aberdeen Angus-sired (AAx) and thirty-six Limousin-sired (LIMx) steers were fed two diets with forage:concentrate ratios (DM basis) of either 8:92 (concentrate) or 52:48 (mixed). Each diet was fed to eighteen animals of each genotype. Methane (CH4) and H2 emissions were measured individually in indirect respiration chambers. H2 emissions (mmol/min) varied greatly throughout the day, being highest after feed consumption, and averaged about 0·10 mol H2/mol CH4. Higher H2 emissions (mol/kg DM intake) were recorded in steers fed the mixed diet. Higher CH4 emissions (mol/d and mol/kg DM intake) were recorded in steers fed the mixed diet (P< 0·001); the AAx steers produced more CH4 on a daily basis (mol/d, P< 0·05) but not on a DM intake basis (mol/kg DM intake). Archaea (P= 0·002) and protozoa (P< 0·001) were found to be more abundant and total bacteria (P< 0·001) less abundant (P< 0·001) on feeding the mixed diet. The relative abundance of Clostridium cluster IV was found to be greater (P< 0·001) and that of cluster XIVa (P= 0·025) lower on feeding the mixed diet. The relative abundance of Bacteroides plus Prevotella was greater (P= 0·018) and that of Clostridium cluster IV lower (P= 0·031) in the LIMx steers. There were no significant relationships between H2 emissions and microbial abundance. In conclusion, the rate of H2 production immediately after feeding may lead to transient overloading of methanogenic archaea capacity to use H2, resulting in peaks in H2 emissions from beef cattle.

Local area farming Plans — a common reality for farmers and conservationists in the Scottish Highlands?

Abstract This paper supports the need for new policy developments to produce farm conservation plans specific to local areas. It explores attitudes to land management for conservation and economic goals, and presents views of fanners and local conservationists, who are directly involved in agri‐environmental and farm woodland schemes, in three regions of the Highlands of Scotland. It reviews the current state of Scottish agri‐environmental schemes, and presents results of on‐farm workshops conducted with farmers and conservationists and discusses common management plan approaches for environmental action. It concludes that farmers and conservationists are already considering the advantages of local area planning at a local area level and agree that there should be focus on addressing local site specific issues which take into account both the whole farm and its wider environment.

Cattle Responses to a Type of Virtual Fence

ABSTRACT Interest in developing more flexible fencing technology to improve pasture and rangeland management is increasing. The objective of this study was to test the efficacy of a new virtual fencing product and measure impact on behavior, thus potentially allowing positive development of virtual fence systems. The Boviguard (Agrifence, Henderson Products Ltd., Gloucester, UK) invisible fence is now commercially available, consisting of cow collars, a battery-based transformer, and an induction cable laid on the ground or buried in the ground. As the Boviguard collar comes close to the induction cable, a warning sound is triggered and if the animal continues to move closer, an electrical stimulus is triggered. We tested this novel system on 10 cows wearing global positioning system (GPS) collars to pinpoint location and activity sensors to gather behavioral data. Two separate exclusion zones were created consecutively in different areas of a test field, with alternate periods of control, with no fence activity, and virtual fence activation. The system successfully prevented the animals from crossing the virtual fence line. No changes in general activity or lying behavior were found. There were significant changes in the pattern of use of the rest of the field area when the fencing system was activated. When only the unactivated cable was left on the ground in a final control period, the visual cue alone deterred animals from entering the exclusion area. The trial showed the effectiveness of a collar-based electrical stimuli system. This approach to virtual fencing could provide solutions for management systems where moving fences frequently is required, such as for strip grazing, nature conservation management of specific areas and habitats, and grazers of land where physical fences are not preferred or feasible.

Sustainable hill and upland systems: what do people want the hills to deliver?

Management of hill land in the UK is undergoing substantial change with Common Agricultural Policy (CAP) reform (e.g. Scottish Executive 2003), new agri-environmental schemes, new rural development regulations and changing societal pressures. Land managers and policy-makers are constantly asking ‘What do we want our hill land to deliver?’ Hill and upland systems are complex, with interactions between environmental, biological and human interests. At the site level this often means making trade-offs of one characteristic or output versus another to get the desired outcome. Quantifying these preferences or choices for different outcomes, as defined by those directly interested on the ground, is essential, albeit difficult. Müller and Schmitz (2002) described how to measure preferences for landscape functions in Germany, as did Hillert et al. (2004), using an Adaptive Conjoint Analysis. This paper describes an attempt to apply such techniques to the hill and upland systems in the UK, to understand and quantify what they should deliver and how policies should be prioritised.