View Single Post
Old 12-13-2009, 03:29 AM
Eric Eric is offline
Join Date: Apr 2007
Posts: 54
Originally Posted by Savvypro View Post
I know this is an old post but I have recently started looking into the are of farming and food production. Anyway...

In “Bread From Stones” it’s interesting that the author doesn’t really recommend the use of manure - calling it a "makeshift" (see from page 89).

Earlier in the book (from page 39), he talked about the ammonia content of manure and the problems it can cause.

He states that there is still benefit in using it (but not for the nitrogen content), especially when rock minerals are added.

The author also cover the use of fish waste fertilisers as not being worth their merit.

As I was reading the book it struck me that the situation will also arise in aquaponics systems where plants extract the fish waste and turn it into “food” for growth. I know it's an over simplification of the process - i.e. nitrogen cycle and how plants grow.

But from what I've seen of some aquaponics setup's, there's not much in the way of added fertilisation and when there is it's the NPK type fertilisers.

I hope the above makes sense as my thought process is connecting dots in two different fields.

i had to grin at this one as aquaponics has been an off and on hobby of mine for awhile now. what refreshed my memory was the part about rock dust. several years ago i purchased a kit from s&s aquafarm and in it they describe how the use of "planters 2", brand name of mineral "dust", increased yealds (if remember right) 20 to 30%, furthermore the plants and fish were more pest resistant, heathier, and those at s&s aquafarm stated that they thought the tiliapia even tasted better. plus you only needed to use a fraction of the dosage because its a closed loop recirculating system so watering and weather dont leache the minerals.

i started with a mid sized system but i have some structural problems with my greenhouse so i am going to reengineer the whole thing.

currently i am running an indoor window sized experement using a vacuume pump to displace water in an upside down aqarium to create a tidal effect to arrate baskets of gravel media in the tank. i am running 4 environmentally isolated systems with 1 pump, one tank has control switches and the other 3are slaved to the same pump. when i have the systems biology up and running (bacteria and fish) i will seed plants and then try the rock dust and see for myself!

Reply With Quote