Publication - Research and analysis

Distillery by-products, livestock feed and bio-energy use: report

Published: 1 Jul 2019
Directorate:
Agriculture and Rural Delivery Directorate
Part of:
Farming and rural
ISBN:
9781787819566

We commissioned this report in response to concerns by livestock farmers about the impact of anaerobic digestion and bio-energy on the availability of distillery by-product for use as livestock feed in Scotland.

48 page PDF

857.1 kB

48 page PDF

857.1 kB

Contents
Distillery by-products, livestock feed and bio-energy use: report
Appendix 3 - Nutritional value of distillery by-products

48 page PDF

857.1 kB

Appendix 3 - Nutritional value of distillery by-products

61. The feed value of distillery feed by-products are well documented[12]. The SAC Farm Management Handbook 2018/19 contains a list of the relative feed values of the main by distillery feed by-products. The nutritional value of feeds varies by animal species. In Scotland ruminant livestock (cattle and sheep) are the main consumers of distillery feed by products. A summary of the key nutritional values of these feeds for ruminants is given in Table A2 below.

Table A2 – Nutritive value of feeding stuffs – ruminants

Feed Dry Matter (DM) (g/kg) Metabolisable Energy (ME) (MJ/kg DM Crude Protein (CP)
(g/kg DM

Brewers grains or draff (23% DM)

230

11.1

200

Wheat Distiller’s Dark Grains

900

13.5

340

Malt Distiller’s Dark Grains

900

12.2

265

Pot Ale Syrup

450

14.2

360

Source: FAS SAC Farm Management Handbook and SAC Consulting

62. Distillery by-products are best suited for use in ruminant diets (beef, dairy and sheep) where they provide good quality protein and digestible fibre. These feeds are highly palatable with few limiting factors to feeding in ruminants though high levels of copper may limit use in some sheep diets. In contrast these feeds are of limited use in pig and poultry rations due to the high level of fibre and low energy density. Table A3 overleaf details recommended maximum inclusion rates in different species.

Table A3 – Maximum inclusion rates by species (%)

Brewers Grains (draff) Distiller’s Dark Grains (Barley) Distiller’s Dark Grains (wheat) Pot Ale Syrup (PAS)

Dairy

30

30

40

25

Beef

40

30

40

20

Ewe

5

10

0

10

Sow

0

0

5

10

Broiler

0

0

5

0

Source: The Feeds Directory, Dr W.N. Ewing (1997)


Contact

Email: Gordon.Jackson@gov.scot