[permaculture-oceania] Re: aerated vs standing liquid manure

[Paul Darrington]

Doug is sure on the right track with this, 

Anerobic Bacteria:
- generally turn most nonmetal elements from an organic form into a gaseous forms (hence nutrients lost to atmosphere) i.e.
     organic S -> SO2 (Sulphur Dioxide gas)
     organic P into Phosphene gas
     organic N into NH3 (Ammonia gas)
     organic Cl into Cl2 (Chorine gas)

- Various organic acids are formed, such as butric acid (contributing to the the sour smell present in some unturned composts)
- Sugars/starches are turned into Alcohols (one of the most deadly compounds to a plants roots)
- and as Doug mentioned pathogenic bacteria are more than likley present


Aerobic Bacteria:
- Nutrients generally form the bodys of bacteria and fungi - an organic form available to the plant & not lost to atmosphere
- Aerobic bacteria & fungi form beneficial relationships with plant roots & leaf surfaces 
- hence; nutrient transfer may be enchanced 
- pathogenic & disease causing bacteria numbers are minimised due to reduced food


I'm sure there are points i've missed, as this is by memory, not out of a book

Cheers
Paul



     
  ----- Original Message ----- 
  From: Douglas Barnes 
  To: permaculture-oceania at lists.cat.org.au 
  Sent: Friday, October 20, 2006 1:08 AM
  Subject: [permaculture-oceania] Re: aerated vs standing liquid manure


  Hi Matthew,

  I suppose there is the potential to lose some elements to oxidation (mostly carbon, I would guess). However, the aerated type hosts aerobic bacteria which tend on the whole to be beneficial bacteria whereas the anaerobic type tend to have more pathogenic bacteria.

  It is reported that the bacteria in actively-aerated *compost* tea remain active for up to 5 months on the surface of the plants that are sprayed. The same might apply to liquid manure.  Having just had my squash die off from a fungi attack (a widespread in pumpkins in Eastern Canada now), I'm eager to test actively-aerated compost tea next year to see if it can't afford some protection for cucurbits.

  I hope that helped some.

  Douglas Barnes
  http://www.ecoedge.ca
  http://permaculturetokyo.blogspot.com

  _______________________________________________________
     1. aerated vs standing liquid manure (Matthew Bond)
     2. The Ethical Omnivore // Thursday 26 October    2006 /// 
        (Catriona Macmillan)

  Hello,

  Could someone please tell me the effect and whether there is any big difference in the end product of a) aerating manure in a solution of water including (but limited to) an air pump that constantly pumps air through the solution or daily hosing into the tub (or other holding device) which produces bubbles; and b) leaving the solution to stand minus aeration.  

  Does the non-aeration store certain things that aeration dispels?  I'm interested in liquid manure techniques.  Guna, guna!  Kuna, kuna!

  Regards,

  Matthew.







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