I wouldn't consider it effective, though you can certainly cycle a tank this way. The problem is regulating how much ammonia is released, liquid ammonia is far easier.
To be honest, it will just make a mess and unless you can guarantee that it will produce 4-5ppm of ammonia, you wont be cycled properly anyway. Way easier to just use liquid ammonia.
Most "meat" isn't going to decompose into a very large amount of ammonia. It isn't that hard to find pure ammonia in most places. Not necessarily easy, but usually not that hard.
Can also ask around for a donation of a someone's filter floss, too.