Effect of different levels of sunflower meal and multi-enzyme complex on performance, biochemical parameters and antioxidant status of laying hens
Published:October 5, 2022
Summary
Introduction The gradual increase in the world's poultry production concomitantly increases the need for ingredients to supply protein for diets. Cereals constitute about 60 - 70% of diets to meet the energy requirements of poultry, whereas oilseeds contribute to cover the dietary protein requirements of birds (Senkoylu & Dale, 1999). Soybean meal (SBM) is the main protein source in po...
Thanks to the authors for an interesting publication, but I think that the practical priority in the matter belongs to the research center of Danisco AS. 25 years ago they formulated the working concept "Sunflower + Enzyme = Soy". The employees of my company supported this idea, because in Ukraine (the number 1 country in the world in the production of sunflower oil and sunflower meal), the cost of sunflower meal at that time was three times cheaper than soybean meal. We did not pay attention to the legal restrictions that set in Europe the maximum allowable level of input of sunflower meal in the feed of laying hens is about 13%. A few years later, all poultry farms switched to diets with 25% - 30% sunflower meal, without reducing productivity. Of course, it was necessary to add some lysine, but this did not really affect the final cost of the feed.
Dr. Fiodor S. Marchenkov Thanks the comments in the use of sunflower meal in poultry diets. Did the addition of amino acids other than lysine, such as glycine and proline, improve the growth performance and health of chickens? Lysine is an important amino acid in nutrition, but perhaps other amino acids should also be considered to maximize the use and benefits of sunflower meal in poultry diets. This will also apply to swine diets.
Guoyao Wu,
Based on your work with Glycine and Proline, I'm curious as to what levels you'd target in poultry diets, especially Glycine. They are not available, that I know of, or are not economical , here in Canada, so we rely on the birds to synthesize them. Is there an amount that birds simply can not reach on their own and require synthetics sources? And what is that "cut-off " amount ?
Thank-you.
George Entz Glycine is the simplest in nature and the most abundant amino acid in animals, including poultry. To my knowledge, glycine is among the cheapest amino acids that are available commercially and its price can be as low as US $1/kg based on the publicly available website. Glycine is also among the metabolically most diverse amino acids in animal nutrition. I discussed the optimum levels of both glycine and proline in my recent "Ideal protein" paper. Please refer to this paper for details. Thanks for this helpful discussion.
Guoyao Wu,
I appreciate your reply.
If you could kindly email me at entzgeorge20@gmail.com. I'm interested in knowing where I could obtain some L- Glycine supply. I had someone quote me at $35/kg, well that won't work.
As far as the paper you mentioned, I have read it last month.It's interesting work, and I'm trying to wrap my head around it. But honestly I have a hard time implementing some of the ratios of AASA's to Lysine your work suggests. The difficulty I have is to know at what point does the bird not synthesize enough on its own or how much of each AASA's in mg for body weight/feed intake are they capable of producing on their own and then supplementing from crystalline source the rest, to obtain the optimum performance we strive for.
Kind Regards,
Hello dear doctor, thank you for your useful article, what is your opinion on the ratio of adding sunflower meal with lysine in the diet of laying hens? Of course, taking into account the age of the herd and the percentage of production
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