You can but in order to start rooting plant needs to find no nutrient at first, forcing it use whatever last energy it has stored on "re-rooting" and not on "growing", Most dry ammendment can be mixed with water and applied, thay way you can still use ppm as a guide if you so choose. It's not much that you can't its more the need for the stem to make the decision to reroot, once she has roots to uptake then you apply.
You do not need to add nutrients until the roots are formed. Then, you'll add a diluted amount, which is usually the same as the manufacturer's recommended amount for seedlings.
Remember that nutrients are taken up by roots. If no roots, no need for nutrients. And a nutrient solution can rob the little plant of water. Water wants to move by osmosis from an area of low concentration to an area of high concentration. Plants take up nutrients as ionic salts dissolved in water. So, without the roots and their associated active transport mechanisms, water can tend to move out of the plant tissue, which has no solutes, to it's harm.
When a plant has produced roots, then it's time to give them nutrient.