I
I don't think I should do that at this stage, especially with human urine having significant levels of nitrogen more than phosphorous and potassium... looks hungry, the Chinese guy next door used urine in his garden, they peed in buckets in the house all winter apparently and then they poured all over his 150 square foot garden, then it would stink for days. Finally enough people complained and started using Miracle Grow (that's civilization for you), you could look into using urine but I don't know the mixture ratio?
-good luck