Nutrition (what to add at each stage)

[eliasmarobin]

To begin with, I do know there is GO-FERM, Fermaid-K and such stuff out there but not everyone has access to them and I think is cool to know what exactly each of those have in the formula.

So, after some research and help I think I figured out how the nutrition steps should be. Please, you guys with more experience, take a look and tell me what do you think:

*1st step (before inocculation, not a starter, just add to the must before adding the yeast):
-Iron, zinc and copper (trace metals, really small quantities)
-Magnesium, phosphorous, potassium
-B-complex vitamins
-Amino-acids

The most important here are the micro and macro nutrients. Nitrogen is not necessary and can actually do harm to the yeast.

*2nd step (at the first noticeable BRIX drop, 2-3 degrees)
-B-complex vitamins
-Amino-acids
-Complete the N need with some supplement (DAP probably)

*3rd step (between 1/3 and 1/2 sugar, based on gravity)
-B-complex vitamins
-Amino-acids
-Complete the N need with some supplement (DAP probably)

The 2nd and 3rd step is actually 1 split into 2 as the yeast does not need the whole dose at once.

I'm working with numbers and concentrations now, maybe we can make a standard homemade nutrition package someday :rockin:
So guys, what do you think?

 

[MedsenFey]

Roger Morse, in his book Making Mead, provides a good formulation for the nutritional needs of the yeast. You could certainly make it "homemade" if you wanted to, but for the time and effort, I personally would rather buy it from Lallemand. Their formula is designed to meet the needs of the yeast allowing me to concentrate on the selection of ingredients and management of the other issues of fermentation. But hey, I'm kind of lazy.

 

[eliasmarobin]

Hahahaha nice... I bought that book... probably will be delivered tomorrow :rockin:

 

[eliasmarobin]

Ok got the books (including Ken one ^^) and now im trying to figure out a recipe for my nutrients...
Question is... can I boil fleischmann baker yeast and then add it instead of peptone?
My idea is to use a 3 basic nutrients and use them like this
-A vitamin mix (steps 1, 2, 3)
-Boiled baker yeast (steps 1, 2 ,3)
-DAP (steps 2, 3)
Steps being:
1- right after pitching
2- first brix drop
3- after 30% depleted sugar

Will the boiled yeast give enough amino acids, iron, zinc and copper to the nutrient mix?
Does someone know that?