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Livestock


Trials highlight benefits of hybrid rye in pig diets


• Big improvements seen in performance • Reduces fat depth at P2 position • Added welfare and gut health benefi ts


H


ybrid rye can be included in fi n- ishing pig diets at rates of up to 60%, according to UK tri- als to evaluate its use as an alterna- tive feedstuff.


The trials were conducted as part of a collaboration between plant breed- er KWS and feed manufacturer ABN. They focused on the value of hybrid rye in feed for fi nishing pigs from 36kg to 115kg live weight.


Starting in early 2020 and involv- ing about 4000 pigs, trials saw three different diets fed during three distinct growth phases: 36kg-65 kg, 65kg-85kg and from there to fi nishing at 115kg live weight.


Full results are expected after the trials conclude in September. But early results are signifi cant at a time when the sector is searching for sustainable raw materials, says ABN senior pig nu- tritionist Steve Jagger.


“The results look very encouraging,”


said Dr Jagger, who is leading the trial. Growth rate, feed intake and feed conversion showed no any signifi cant differences between treatments. But a signifi cant effect was observed for the measurement of fat depths at the P2 position, which reduced at the rate of 0.2mm per 20% inclusion of rye. There was no notable effect of treat- ment on deaths and mortality, but these were lower when fed rye. En- ergy and protein levels compare well with wheat and rye’s fi bre content is associated with additional welfare and gut health benefi ts.


“Rye has slow release of energy from


the large intestine and increases sa- tiety, which is why it has been associ- ated with positive behavioural effects in fi nishing pigs and gestating sows,” said Dr Jagger.


Proven benefi ts This effect may also be of value over the farrowing process where a contin- ued supply of energy may help reduce the number of stillborn piglets, he add- ed. Rye has also been associated with a reduction in ulceration.


“Its structure can improve gut health and lower skatol, reducing car-


32 MIDLAND FARMER • AUGUST 2021


cass taint. It gives rise to high levels of butyric acid which can reduce the inci- dence of salmonella as well as increase the antibody levels in colostrum.” KWS feed product manager Rich- ard Grone is a qualifi ed veterinarian. The benefi ts of feeding rye have been proven by pig producers all over the world, he said.


“Major improvements in perfor-


mance, health, behaviour, and wel- fare have been recorded in pigs from fi ve weeks of age to fatteners, both in controlled conditions and commercial situations.


“This latest UK trial represents an exciting development for producers at a time when the industry is aiming to reduce its environmental impact and the focus on animal welfare and health is increasing.”


“Previous trials to assess how the


inclusion of rye in pig diets affects per- formance have shown promising re- sults on growth rate, feed intake and feed conversion ratio. Although not yet been included in compound feeds, there is increasing interest.”


Hybrid rye can be substituted one- to-one for wheat and barley, so it offers


many possibilities for feed compound- ers and producers. The amount which can be included is not fi xed and can range from 20-70% – but most produc- ers start using it at 30%-40%. “Hybrid rye also fi ts in well with the requirements of the UK’s new agri- culture bill by delivering nitrogen and agrochemical savings without compro- mising yields, while its straw acts as a novel stimulus and helps to further reduce aggression.”


Increasing interest Frontier Agriculture regional seed manager Chris Piggott said the results were encouraging because interest in growing hybrid rye is high among from arable farmers. The crop had signifi - cant agronomic and economic benefi ts in certain situations, he added. “To establish rye as a viable option in the rotation, it is essential to en- sure that it works for the whole sup- ply chain, from growers and the trade to the feed industry and other end-us- ers,” said Mr Piggott. “Frontier’s role is to facilitate that and our investment in these areas could help to bring about a signifi cant increase in the UK rye area, if market conditions allow. New varieties play a key role in achieving that goal. For ex- ample, KWS Tayo has PollenPlus tech- nology which provides effective protec- tion against ergot in rye.”


Rye has many benefi ts as an ingredient in pig feed,


suggests the study


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