Much if not all of what you listed I can't see being directly available or useful to the plant. The protiens stand out and via microbial breakdown could result in NH3 being released into the soil and therefore boosting the suplly and / or efficiency of Nitrogen use by the plant.

So perhaps as a control you would use a fertilizer containing Nitrogen for each test but the non control group would have the extra protien from the mixture your testing and look for a reponse that could be attributed to Nitrogen.

If you have an extra thousand dollars sitting around you could get a chlorophyll meter and track relative Nitrogen levels in the leaves of the plants in your different test. LOL.

Keep in mind you also need to control watering inputs light , temperature. Interesting experiment.

Good Day ...

Does it have any chelating agents in it? Names are usually EDTA or some such - maybe ethylenediaminetetraacedicacid - sometimes the DT are different combinations of d and t and m. If so it might help get trace elements to the plant and make the plant look better when it isn't doing much that a cheap liquid fertilizer would do.