I’ve been playing around with brewing compost tea with some experimental additions. Using worm castings, molasses and kelp (no fish products or other additives) and brewed some nice smelling brews. I cant say for sure how much improvement I noticed it after foliar applications, but I know much of the microbial benefits may not be immediately apparent.
I started peeing in the bucket while it was bubbling away cause why not? I use dilute urine (10 parts water to 1 part urine) as fertigation on plants, so I figured why not?. After peeing in brew I noticed a definite off smell after 12 hrs or so. I opted for a soil drench with this batch as I trust my nose.
Does anyone else have experience with adding urine to a compost tea batch. If so how much? Do you notice any shifts? Would it be better served in a bacterial or fungally dominant brew I wonder.
Urine is Urea, not the best thing in the world for microorganisms since fresh it has anti fungal/ anti bacterial properties which means the urine will kill off the bacteria and fungi you are trying to propagate in quantity.
There are several issues that need to be addressed here.
First, the research is pretty clear debunking the claimed benefits of aerated, aerobic, “brewed“ compost tea. Empirical data show that its use is of minimal benefit, if any at all. On the other hand, however, the research is equally clear on the benefits of anaerobic compost tea application. It's also easier to make.
Second, urine is a good source for nitrogen, potassium, and phosphorus, but it is also high in salts, so it's regular use should be accompanied with some sort of salinity management plan.
Third, the research also debunks the claimed benefits of foliar application of compost tea. It appears beneficial for a number of reasons that have little to do with the compost tea itself
Fourth, research indicates that a 1:3 or 1:5 mix of urine and water plus compost tea is optimal as a fertilizer. Higher dilution ratios stem from the aforementioned use as a foliar spray, to avoid damaging leaf structures. But as mentored, foliar application provides negligie benefit to the plants, regardless of any anecdoteal claims.
Bryant RedHawk wrote:Urine is Urea, not the best thing in the world for microorganisms since fresh it has anti fungal/ anti bacterial properties which means the urine will kill off the bacteria and fungi you are trying to propagate in quantity.
This is the first I've heard of urea in urine having detrimental effects on soil biology. I've used undiluted urine on my vegetable garden with only positive results.