Amino Acid Content in Organic Soybean Meal for the Formulation of Organic Poultry Feed
Published:February 28, 2019
Summary
Over the past several years, organic poultry production has been rapidly expanding (Rogenburg et al., 2008). This alternative to conventionally produced poultry meets consumers’ expectations for healthier animal protein sources (ATTRA, 2010). According to standards set by the U.S. Department of Agriculture (USDA) National Organic Program, to be certified “organic poultry,” birds...
Dear Claudia and Justin
We are a Company in Austin that pursues similar goals on this Article.
Currently we are developing protocols for mortality and litter disposal to use as compost to build top soil on nutrients depleted agriculture fields in Southeast Mexico.
The goal is to use those fields to grow organic soybeans.
Any input and recommendation from you all will be more than welcome.
Great research, congrats.
Marco Aurelio Arredondo, thanks for the comment. It's even more of a coincidence than you think because I also do research on the use of mortality compost on farm crops! Now the question would be if using mortality compost on organic soy would change its status, let me know your thoughts on that. We should have another similar paper on organic corn.
First, may I politely ask you to give credit to Evonik and properly reference the fact that the "conventional" soya data you quote comes from our AminoDat 5.0 raw material database. Your amino acid values are IDENTICAL to those quoted in this data base and so reference should be noted.
You give no data in your paper regarding number of samples in your survey. The AminoDat values are based on 1241 samples collected globally. Please provide some data on sample size and variance so we might able to correctly assess is any difference is actually significant. Certainly growing conditions can influence amino acid content (by altering protein composition) but just comparing means is not sufficient.
Regarding digestibility; this has much more to do with processing and NSP content, and again we would need more data to conclude the data provided is actually correct.
I agree that protein content of soybeans may vary depending on variety, fertilization level, degree of maturation of the grain and some other environmental conditions. However, the proportion of the different amino-acids in the protein will not be different between the conventional and organic organic. The only way the same variety of soybean grown conventionally or under the "so called" organic conditions is if there is a change in the DNA structure of the protein of the variety. Science proves that it is true.
Alfredo Navarro De Andrade Agree regarding composition of crude protein. However, genetic expression leading to varying amounts of the different proteins found in soyabeans IS influenced by growing conditions as well as strain; therefore there are differences, as we see clearly in our data from AminoDat. I doubt, though, that "organic" growing will have a significant effect on AA composition; and I strongly believe SID coefficients will NOT be enhanced in such material.
Martin Smith It was exactly what I said. That was the reason that I mentioned: "The only way the same variety of soybean grown conventionally or under the "so called" organic conditions is if there is a change in the DNA structure of the protein of the variety". My citation was exactly due to the fact that different varieties may present small differences in their protein composition - More glycinin and/or beta-conglycinin , for example. There are special soybean varieties that yields better tofu due to their different protein profile. But, I still affirm that comparing same soybean variety, organic growing conditions will not change AA composition.
There is a difference in crude protein levels of soybeans grown in different latitude in the US as different varieties have been developed by agrinomists for particular regions. I have not seen the particular data regarding conventional vs organic but unless you are comparing beans grown in same geographical area...and beans of the same genetic stock...you are already in error
As Martin Smith pointed out, digestibility of soybean meal is more a function of processing due to variance in the heating used for solvent removal. Unless the comparison is made between beans of the same variety grown in the same geographical region under similar soil types and processed under the same conditions, any comparison of conventional and organic soybeans is invalid. I wish some people had taken a course in experimental design, we would not have so much invalid information running around.
Dear Dr. Dunkley
Not sure if Mortality Compost would have in impact on AA content, still, based on the feedback from this forum, we will run trials with the same beans grown in same geographical area (South east Mexico) on top soil resulting from CAFO´S Organic Matter Compost and then test the AA content and digestibility. We will gladly share the results.
We have developed new Fields either for Organic or Conventional Agriculture with good results, so we are confident about the project.
If possible, I would like to contact the University of Georgia Poultry Extension, my email is marco@slkta.com.
Thanks.
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