This is definatly for Mariculture Jewlery it used to work on armour but was changed in las release. you can put it on Jewelery but then you need to Activate it via a key which you will need to remap or make a mirror in mariculture.
P.s you can wear upto 3 peices of Jewlery at one time and they can have multiple enchants on....never hungry was great but got config'd out in last ftb release... Look out for restore tho level 3 will repair any tools in your hotbar and any armour you are wearing