Monday, November 17, 2014

17/11/2014: Utlisation of roasted Guar Korma as alternative for fishmeal

Roasted Guar Korma is a high protein raw material, obtained after extraction of Guar gum from the seeds of the leguminous plant Cyamopsis tetragonoloba. It is cleaned and roasted after the gum extraction, to remove anti-nutritional factors present in korma, such as trypsin inhibitor, improving its nutritional values and total digestibility.

The product is obtained without added chemicals or preservatives and is completely GMO-free, which can be an important factor to replace soybean meal. Roasted Guar Korma is thus a competitive alternative for soybean meal, but there is little information about its use in aquafeeds.

Three experimental diets were produced: one reference diet, a diet with five percent roasted Guar Korma and a diet with 10 percent roasted Guar Korma. Feeds are produced with a pelletmill on a two mm die, using preconditioning with steam (>90°C) and postconditioning (>90°C) during 20 minutes. Roasted Guar Korma replaced 50 percent soybean meal and 50 percent Chilean fishmeal to obtain the same protein levels in all feeds.

"In conclusion we can safely conclude that five percent roasted Guar Korma can replace 2,5 percent soybean meal and 2.5 percent fishmeal in feeds for shrimp (Litopenaeus vannamei), which is an important result, because it will be an important cost-saving for the shrimp feed producer," say authors
Eric De Muylder, Diana Pablos, Milivoj Rubcic and Leon Claessens in he latest edition of International Aquafeed.

"Also 10 percent inclusion rate is possible, but then there might be a very low effect on growth and FCR. Roasted Guar Korma is also a valuable alternative for soybean meal in case the producer wants to guarantee GMO-free production.

Read more HERE. 
(Feature appeared in IAF1406)

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