Ask a Question forum: Allelopathic wood for hugelkultur

Views: 619, Replies: 9 » Jump to the end
Name: Charlie Treher

Image
pappyt
Feb 17, 2014 3:26 PM CST
I have an excess of "tree of heaven" on my property. It took possession before I knew what it was. I understand it has very strong allelopathic effect. My question to you is have you ever used any strong allelopathic wood or plants in your hugelkultur beds and if so, did they cause a problem. I'm not sure once cut and dried for a year or so that the chemical effect would still cause a problem. If not, I would have plenty to start many hugelkultur beds.

Thank you.
Name: Dave Whitinger
Jacksonville, Texas (Zone 8b)
Charter ATP Member Region: Texas Master Gardener: Texas Permaculture Raises cows I was one of the first 300 contributors to the plant database!
Garden Ideas: Master Level Beekeeper Garden Sages Avid Green Pages Reviewer Celebrating Gardening: 2015 Plant Identifier
Image
dave
Feb 17, 2014 4:32 PM CST

Garden.org Admin

I've never used allelopathic woods in my hugelkultur beds and I would have serious reservations about doing so, even if the wood was very old. Considering how long of a timeframe one is looking at in a hugelkultur bed, it just doesn't seem worth the risk to me.
Name: Tom Cagle
SE-OH (Zone 6a)
Old, fat, and gardening in OH
Coppice
Feb 20, 2014 9:59 AM CST
The wood isn't going anywhere, nor are you. Create a test bed with alopathic wood and test fire it for a couple years.
Name: Charlie Treher

Image
pappyt
Feb 20, 2014 6:06 PM CST
Thanks for your suggestions. Yes, perhaps I will do a test bed and put some native wild flowers in the bed.

anazoh
Dec 7, 2015 10:16 PM CST
Hello, i really need some help here, i want to ask question regarding allelopathy, so i've done experiment on Chromolaena odorata leaves extract, and i've tested it on the the germination of Amaranthus tricolor seeds. However, problem is my result shows that, 10.0% concentration of leaves extract application shows better result in seed germination compared to 7.5% extract of leaves. can someone explain this to me please, i'm really desperate to know.
Name: Greene
Savannah, GA (Sunset 28) (Zone 8b)
Rabbit Keeper Critters Allowed Celebrating Gardening: 2015 Plant Identifier Garden Ideas: Master Level Garden Sages
Herbs Region: Georgia Region: United States of America Native Plants and Wildflowers Dog Lover Composter
Image
greene
Dec 7, 2015 10:48 PM CST
@anazoh, Welcome! Welcome to ATP.

Whew, that's a complicated question. Blinking
I did a quick Google search and found several articles like this one which may help to explain:
http://www.idosi.org/ajps/5(4)12/1.pdf

Here is another one:
http://www.regional.org.au/au/allelopathy/2005/2/1/2418_alab...

Sunset Zone 28, AHS Heat Zone 9, USDA zone 8b~~"Leaf of Faith"
Name: woofie
NE WA (Zone 5a)
Charter ATP Member Garden Procrastinator Greenhouse Dragonflies Plays in the sandbox I was one of the first 300 contributors to the plant database!
The WITWIT Badge I helped plan and beta test the plant database. Dog Lover Enjoys or suffers cold winters Container Gardener Seed Starter
Image
woofie
Dec 10, 2015 10:42 AM CST
@greene @anazoh That first link doesn't work if you just click on it. But it does work if you copy and paste it. (For some reason, the whole address isn't highlighted as a link.)
Confidence is that feeling you have right before you do something really stupid.
Name: Sue
Ontario, Canada (Zone 4a)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
Region: Canadian Keeps Horses Dog Lover Plant Identifier Garden Sages
Image
sooby
Dec 11, 2015 5:47 AM CST
anazoh said:Hello, i really need some help here, i want to ask question regarding allelopathy, so i've done experiment on Chromolaena odorata leaves extract, and i've tested it on the the germination of Amaranthus tricolor seeds. However, problem is my result shows that, 10.0% concentration of leaves extract application shows better result in seed germination compared to 7.5% extract of leaves. can someone explain this to me please, i'm really desperate to know.


Do you know for sure that Amaranthus is supposed to be susceptible to its allelopathic effects? If not then my first thought would be that it is not, same as not all plants are susceptible to the juglone from black walnut for example. In that case the explanation may be that there's something in it that stimulated the germination or it is coincidence. How many seeds were in the test batches? Did you have an untreated contol?

Edited to add - by coincidence I mean that the 10% versus 7.5% difference may be coincidence but that somewhat depends on how many germinated and how many seeds were started.

BTW I had trouble finding this question again, I think it was a separate thread originally unless I'm dreaming. When I came back to answer I finally found it tagged on to this thread. @anazoh welcome to ATP and I hope you find your way here.
[Last edited by sooby - Dec 11, 2015 7:20 AM (+)]
Give a thumbs up | Quote | Post #1005156 (8)

anazoh
Jan 9, 2016 7:30 AM CST
Hey, thanks for the answer btw, yeah, i've only have time replaying to this post now, i'm sorry. I think it's supposed to be susceptible as the 7.5% leaves extract of Chromolaena, do have very significant effects on the germination success of the seeds, where many are seems to not germinating. i do have control ( using distilled water). and i've tested 30 seeds in each treatment, with 3 replicates. Thanks for the warm welcome :)
[Last edited by anazoh - Jan 9, 2016 7:55 AM (+)]
Give a thumbs up | Quote | Post #1027213 (9)
Name: Sue
Ontario, Canada (Zone 4a)
Daylilies Birds Enjoys or suffers cold winters Native Plants and Wildflowers Butterflies Annuals
Region: Canadian Keeps Horses Dog Lover Plant Identifier Garden Sages
Image
sooby
Jan 9, 2016 7:46 AM CST
I found the same Australian link for research on the allelopathic effects of Chromolaena that Greene gave earlier in the thread, which says:

"Weed seed germination was inhibited by siam weed extract more than crop seed germination. Maize seed germination was not hindered by siam weed extract while on cowpea and soybean, 14 and 8 percent reduction in seed germination, respectively was recorded when compared with the untreated control. Percent reduction in germination in siam weed treated with the extract was 87 %, when compared with the untreated control . Siam weed extract had some inhibitory effect on soybean growth at the later stage of crop growth, while the growth of maize, cowpea, tridax and siam weed itself was stimulated by siam weed extract."

Allelopathic Effect of Siam Weed (Chromolaena odorata) on Seed Germination and Seedling Performance of Selected Crop and Weed Species

This confirms that not all seeds are affected by it, since corn (maize) was not.

« Garden.org Homepage
« Back to the top
« Forums List
« Ask a Question forum
You must first create a username and login before you can reply to this thread.

Today's site banner is by dirtdorphins and is called "Dianthus 'Nyewood Cream'"