Health of Organic vs Synthetic Flowers

NaturalFarmer

Well-Known Member
3.1. Role of Plants in Remediation of Arsenic

Plants require an adequate supply of all nutrients, as part of normal growth and development [58], including arsenic, for their normal physiological and biological functions.

https://www.hindawi.com/journals/tswj/2014/921581/

The reasons why plants accumulate and metabolize arsenic are considered in an evolutionary context.

https://nph.onlinelibrary.wiley.com/doi/full/10.1046/j.1469-8137.2002.00363.x


People need arsenic too, but like a tiiiiiiny amount. Some elements are purely toxic to us though, such as mercury.

I wish there was more cannabis specific research, but rest assured, that it can and does absorb heavy metals.
I didn't mean that they don't uptake it at all, just not enough to be of a concern. If we were growing rice it would be a different story. Cadmium is different though and is taken up much easier.

As I said before exposure is the big issue with lead not uptake. Crops exposed to soil (roots and tubers) or closer to the soil (leaf veggies) get high concentrations.
 

dstroy

Well-Known Member
I didn't mean that they don't uptake it at all, just not enough to be of a concern. If we were growing rice it would be a different story. Cadmium is different though and is taken up much easier.

As I said before exposure is the big issue with lead not uptake. Crops exposed to soil (roots and tubers) or closer to the soil (leaf veggies) get high concentrations.
Cool, we're on the same page.

It would be nice to know what concentration in the soil would translate to negative health effects. Maybe it'll be legalized federally and we'll find out when large crop studies become possible.
 

churchhaze

Well-Known Member
I didn't mean that they don't uptake it at all, just not enough to be of a concern. If we were growing rice it would be a different story. Cadmium is different though and is taken up much easier.

As I said before exposure is the big issue with lead not uptake. Crops exposed to soil (roots and tubers) or closer to the soil (leaf veggies) get high concentrations.
But cadmium has the added benefit of helping the nitrifying bacteria convert nitrite into nitrate!! :bigjoint:(actually I think i got this one backwards, but putting it backwards ruins my joke!)

 
Last edited:

meangreengrowinmachine

Well-Known Member
As an organic farmer, I can tell you that it is obvious that soil on average is going to have more heavy metals than a salt based hydro nutrient. This doesn't mean however that the plant will uptake it. Much also depends where you are on this rock.
Lead concentrations are heaviest in soils near LA, Chicago and NYC because of leaded gasoline use in the 70's. Azomite is often used by cannabis growers (for some unknown reason to me) yet introduces levels of cadmium that would not be seen otherwise.
Early sources of Super rock phosphate came from Nauru (an island off of New Zealand) which were later found to be contaminated with cadmium.

Cadmium is of the biggest concern because it can be taken up by the plant unlike lead or arsenic.

High levels of SOM and a pH above 6.2 will lessen any uptake.

Again to the OP, whose soil and whose facts? It makes a big difference.

hmm so Azomite is a no go huh? is this just due to the Cadmium? (not that, that is not enough) but is there another reason you see it as not useful? not being snarky legit asking
 
Top