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Silage Fermentation, Trish Lewis

Trish is a consultant nutritionist based in Auckland, New Zealand. With an Honours degree in Agriculture from Nottingham University in UK and gained many years’ experience working in the UK dairy and animal feed industries before immigrating to New Zealand in 1997. After working as a nutritionist for Nutritech for 4 years and as a technical manager with CTS for 5 years, and was then self-employed in 2006. Now, semi retired, Trish spends the majority of working time giving advice on forage conservation and silage management. Trish is highly sort after and well regarded within the ruminant nutrition industry.

Trish deep dives into the chemistry and fermentation that occurs within silage. She highlights the active roles that different bacteria have and how they act and move (or not) within the stack. She walks through the biological, chemical and physical attributes that occur in different feed substrates when ensiling and the various seasonal and managerial aspects can influence the quality of the silage. Trish shares what these changes can do to the silage and how it can be managed effectively. All while highlighting the nutrient losses from the stack and the impact this can have on cow appeal.

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