As a moderately experienced small-scale winter sprouter (till sprouts are green and 2-4 inches tall, sprouted in spring water) of wheat for my chickens, I decided to try to prove that it's not worth my time.
A couple of interesting pieces of info were found.
Example one -- from the famous and oft referenced Chavan and Kadam, 1989, Nutritional Improvement of Cereals by Sprouting. These fellows were working in the Dept of Biochemistry at an Agricultural University in Rahuri, India. This is from the abstract of the study. I couldn't find a copy of the actual study unless I was willing to spend something like $43US, and I'm too cheap for that and suspect most of us are.
They do claim that there is limited increase of a few amino acids (building blocks of protein), but that's not necessarily a great amount or enough of an increase to make
it worth my time.
The part that hit me in this abstract was where it stated that the degree or magnitude or level of the improvement in the nutrition of the sprouted cereal grain ... "is not large enough to account for in feeding experiments with higher animals." Help me out; I'm not sure what that means exactly. Doesn't that mean that the improvement in nutrition isn't very large? That "account for in feeding experiments" could be some sort of agricultural lingo that I don't recognize.
Example two -- from Peer and Lesson from the Dept of Animal and Poultry Sciences at the University of Guelph, 1985, also often quoted, Feeding Value of Hydroponically Sprouted Barley for Poultry and Pigs.
An interesting point in this article is that the digestibility of protein and energy was higher for grains sprouted for 4 days that it was for whole grains. However, digestibility of protein and energy was highest if the grain was ground. (Barley). So on the digestibility of protein and energy it probably looks like this:
ground grain > sprouted grain > whole grain (the > is meant to represent "greater than" when measuring digestibility of protein and energy)
I guess if my choice was whole grain vs. sprouted grain and I was looking at digestibility of protein and energy, then sprouting the grain for 4 days is the better choice. But if I can grind the grain, then that would be my best choice. Sorta interesting.
But I'm still going to sprout wheat in the winter for my chickens. Once there is growth of green wheat shoots, then there is chlorophyll and that isn't being measured in either of the above studies. It's a cheap way to feed my chickens some live food in the middle of a dark, cold winter if the grass is all covered by snow. And, again, it's not their main feed; it's a supplement.
Edited typo because barley is not spelled barely.