[Stoves] rice hull biochar and mustard greens

Paul Olivier paul.olivier at esrla.com
Wed Nov 28 14:42:15 CST 2012


See comments.

On Wed, Nov 28, 2012 at 10:25 PM, Cecil Cook <cec1863 at gmail.com> wrote:

> Dear Paul Oliver,
>
> What do you think is going on to produce such a tremendous improvement in
> the productivity of the biochar boosted plots?
>

The paper on biochar to the mustard greens has not yet be published.
As soon as I get the link, I will send it to you.


> Are we sure the soil, water conditions, and cultivation regimes were
> otherwise identical save for the addition of 5 kg of rice hull biochar per
> m2 to the experimental plot?
>

Yes, Dr. Thomas Reginald Preston does things in a thoroughly scientific
manner.


>
> I did not understand the 25% weight gain for cattle.  Is that because they
> are feeding of biochar boosted pasture?
>

Read the biochar-to-cattle paper carefully.
Dr. Ron Leng does an excellent job of trying to explain what is going on
here.

Dr. Preston and Dr. Ron Leng have been conducting
experiments<http://www.lrrd.org/public-lrrd/proofs/lrrd2411/leng24199.htm>in
Laos wherein 0.62% rice hull biochar (DM basis) was incorporated into
cattle feed as a means of reducing enteric methane emissions and enhancing
feed conversion.


>
> If these results are factual and can be replicated both in Vietnam and
> elsewhere in the world, maybe rice hull biochar provides exactly what the
> soil in that area of Vietnam needs to improve its fertility.
>
>
Dr. Preston does incredible work in the field of sustainable agriculture.
His latest work with biochar is truly amazing.


> What is the soil like where this test was carried out? Hopefully the
> researcher has done baseline and post biochar soil ferility tests.
> **
> In service,
>
> Cecil Cook
> South Africa
>
> **
>
> On Wed, Nov 28, 2012 at 1:20 AM, Paul Olivier <paul.olivier at esrla.com>wrote:
>
>> Dr. Reg Preston did another study with rice hull biochar from my gasifier.
>> He applied 5 kg of rice hull biochar per m2 to a plot of mustard greens.
>> To a second plot of mustard greens he applied no biochar.
>> This second plot received the same water, fertilizer and management as
>> the first.
>> The plot with biochar had a yield 4 times greater than the plot without
>> biochar.
>>
>> With cattle we see a 25% increase in growth.
>> With mustard greens we see a 400% increase in growth.
>> Rice hull biochar produced in a top-lit updraft gasifier appears to be
>> quite valuable.
>>
>> Thanks.
>> --
>> Paul A. Olivier PhD
>> 27C Pham Hong Thai Street
>> Dalat
>> Vietnam
>>
>> Louisiana telephone: 1-337-447-4124 (rings Vietnam)
>> Mobile: 090-694-1573 (in Vietnam)
>> Skype address: Xpolivier
>> http://www.esrla.com/
>>
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>
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-- 
Paul A. Olivier PhD
27C Pham Hong Thai Street
Dalat
Vietnam

Louisiana telephone: 1-337-447-4124 (rings Vietnam)
Mobile: 090-694-1573 (in Vietnam)
Skype address: Xpolivier
http://www.esrla.com/
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