Humic Acid Reduces THC???

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dtcharneski

Well-Known Member
just doing some reading and came across this article
www.frontiersin.org

Frontiers | Impact of N, P, K, and Humic Acid Supplementation on the Chemical Profile of Medical Cannabis (Cannabis sativa L)

Mineral nutrition is a major factor affecting plant growth and function. Increasing evidence supports the involvement of macro and micronutrients in secondar...
www.frontiersin.org www.frontiersin.org
also
The influence of the nutritional supplements on mineral levels also varied throughout the plant (Figure 5). Not surprisingly, P treatment increased P levels in the fan and inflorescent leaves. More surprising was the increase in Ca levels in flowers and inflorescence leaves. P supplementation increased Ca levels in the flowers from 13.2 to 29.4 mg g−1 (Figure 5D). In addition, P supplementation increased zinc levels in all of the studied organs.
 

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dtcharneski

Well-Known Member
Rurumo said:
I've just read through this once, but it is interesting. I wish they had looked at increased K rather than P, or into ca or sulfur. The humic acid results are a bit disturbing. I'll definitely be going over this article more carefully later today. Good find.
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Yeah I'm still reading it and it has a lot of links to other papers so I'll be reading a lot today lol
 
rkymtnman

rkymtnman

Well-Known Member
good post.

i've used HA in the past: i find it hard to believe it drops thc that much though. might have to re-think if i use it again.

post up what else you find plz.
 
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dtcharneski

Well-Known Member
rkymtnman said:
good post.

i've used HA in the past: i find it hard to believe it drops thc that much though. might have to re-think if i use it again.

post up what else you find plz.
Click to expand...
here one on k uptake
www.frontiersin.org

Frontiers | Response of Medical Cannabis (Cannabis sativa L.) Genotypes to K Supply Under Long Photoperiod

Potassium is involved in regulation of multiple developmental, physiological, and metabolic processes in plants, including photosynthesis and water relations...
www.frontiersin.org www.frontiersin.org
 
rkymtnman

rkymtnman

Well-Known Member
Dreminen169 said:
What do they mean by the ‘inflorescence leaves’? Are they saying that those concentrations were not affected in the buds of the lowers? Just the leaves?
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i found this but i still not sure of the difference either???

Distinguish between flower and inflorescence.

Distinguish between flower and inflorescence.. Ans: Hint:An inflorescence is a flower group arranged on a stem consisting of a main branch or of a complicated branch arrangement. It is the modified seed plant's part where flowers develop.Complete ans...
www.vedantu.com www.vedantu.com
 
Wastei

Wastei

Well-Known Member
Not to be that guy but it's only one of many studies about the subject matter.

Haven't read the article but I have a hard time seeing HA having any negative effect in soil and containers. If the study is with hydro I have experienced the same thing by trying to add HA straight to the reservoir. But that's mostly from poor root development.

I'm sure the result would be different with a more controlled clean Humic extract. Did they use different extracts and how's the manufacturing process? Clean, dirty or something in between?

Did they use HA as foliar spray or in the nutrient solution and what was the application rate? Did they optimize microbial life that's supposed to benefit from added HA? Cheers!
 
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dtcharneski

Well-Known Member
Wastei said:
Not to be that guy but it's only one of many studies about the subject matter.

Haven't read the article but I have a hard time seeing HA having any negative effect in soil and containers. If the study is with hydro I have experienced the same thing by trying to add HA straight to the reservoir. But that's mostly from poor root development.

I'm sure the result would be different with a more controlled clean Humic extract. Did they use different extracts and how's the manufacturing process? Clean, dirty or something in between? Cheers!
Click to expand...
in the article they show the HA helps with nutrient uptake and doesn't affect plant growth per say just the production of the secondary metabolites
 
Rdubz

Rdubz

Well-Known Member
dtcharneski said:
just doing some reading and came across this article
www.frontiersin.org

Frontiers | Impact of N, P, K, and Humic Acid Supplementation on the Chemical Profile of Medical Cannabis (Cannabis sativa L)

Mineral nutrition is a major factor affecting plant growth and function. Increasing evidence supports the involvement of macro and micronutrients in secondar...
www.frontiersin.org www.frontiersin.org
also
The influence of the nutritional supplements on mineral levels also varied throughout the plant (Figure 5). Not surprisingly, P treatment increased P levels in the fan and inflorescent leaves. More surprising was the increase in Ca levels in flowers and inflorescence leaves. P supplementation increased Ca levels in the flowers from 13.2 to 29.4 mg g−1 (Figure 5D). In addition, P supplementation increased zinc levels in all of the studied organs.
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Wow this a good find it's a lot to process so basically HA helps uptake but hinders canabinoid production?
 
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dtcharneski

Well-Known Member
Rdubz said:
Wow this a good find it's a lot to process so basically HA helps uptake but hinders canabinoid production?
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yes that's what I get from it, A catch 22 really, the HA allows you to run a lower ec, helps with the nutrient uptake and hence should and in most cases does help with overall plant growth, but at the expense of secondary metabolites. I guess the HA breaks down the secondary metabolites the same way it breaks down matter to help facilitate nutrient uptake
 
rkymtnman

rkymtnman

Well-Known Member
dtcharneski said:
yes that's what I get from it, A catch 22 really, the HA allows you to run a lower ec, helps with the nutrient uptake and hence should and in most cases does help with overall plant growth, but at the expense of secondary metabolites. I guess the HA breaks down the secondary metabolites the same way it breaks down matter to help facilitate nutrient uptake
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so what would you expect Fulvic acid to do? they are pretty similar.

i've used a fulvic/humic blend and if i remember correctly, the fulvic is used at most ph levels. the humic is best at +7 pH which hydro solutions should be around 6 anyway? someone correct me if that's wrong.
 
Wastei

Wastei

Well-Known Member
rkymtnman said:
so what would you expect Fulvic acid to do? they are pretty similar.

i've used a fulvic/humic blend and if i remember correctly, the fulvic is used at most ph levels. the humic is best at +7 pH which hydro solutions should be around 6 anyway? someone correct me if that's wrong.
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They're both technically chelating agents so the whole study sound really weird and interesting to me really. I haven't used kelp/humic in late flower though, only to build structure with more axillary shoots and root growth.

Maybe there's a reason some recommended to stop using Kelp/Humic blend about half way in flower? I've always intuitively stopped when I have enough tops, that's normally in mid flower. Cheers!
 
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