Crop Steering in coco. How to determine optimal EC?

[Piff Rhys Jones]

The only part of a root that can uptake Ca is newly formed growing points. If your roots are stopping growing you cant uptake Ca. Its because of the large size of Ca. You should look into how its translocated in the plant also, you will reconsider trying to slow transpiration. If you really want to learn get plant nutrition, physiology, etc books, the peckerheads on snappergram and instarchat dont know their ass from their elbow.

If ca can’t be uptaken during late flower, why is Athena’s finishing product a mix containing calcium chloride? Why is gypsum used by some as a finishing feed? Not trying to bait an argument, I’m generally interested.

Peace

 

[Ca++]

Calcium is often used to flush a substrate. While chlorides can keep things cleanly, at a time when the plant isn't making a lot of effort to maintain the roots, and would rather be doing something else.
Often the extra Ca is added as a response to the plants troubles getting it. Though it's just wishful thinking I believe. Ca should be loaded up early, and the notion it can't be relocated needs a second look.

While the root system has certainly stopped bulking up as flower production gets into full swing, I don't quite subscribe to the idea it's stopped growing localised hairs. I think there composition might be more the issue, than their presence. However, hard dry-backs in later bloom are a real recovery problem, as they just push the plants to finish, not replace all the lost mass. It's later bloom when I'm using more calcium chloride to keep things clean, rather than provide calcium. The chlorination of my tank would be toxic before any meaningful calcium had been added, with such a product.

 

[Piff Rhys Jones]

Calcium is often used to flush a substrate. While chlorides can keep things cleanly, at a time when the plant isn't making a lot of effort to maintain the roots, and would rather be doing something else.
Often the extra Ca is added as a response to the plants troubles getting it. Though it's just wishful thinking I believe. Ca should be loaded up early, and the notion it can't be relocated needs a second look.

While the root system has certainly stopped bulking up as flower production gets into full swing, I don't quite subscribe to the idea it's stopped growing localised hairs. I think there composition might be more the issue, than their presence. However, hard dry-backs in later bloom are a real recovery problem, as they just push the plants to finish, not replace all the lost mass. It's later bloom when I'm using more calcium chloride to keep things clean, rather than provide calcium. The chlorination of my tank would be toxic before any meaningful calcium had been added, with such a product.

Do you think any calcium can still be up taken late in flower, or is it just being moved around from what’s been accumulated earlier on?

Peace

 

[Ca++]

Do you think any calcium can still be up taken late in flower, or is it just being moved around from what’s been accumulated earlier on?

Peace

It gets harder to take in. A calcium deficiency in later flower, is really a sign that calcium was needed earlier, and not something that can be corrected in the later half of bloom.
Tissue samples of bud show it's coming from somewhere, and when you look at some peoples defoliation practices, it's not just from leaves. It's still a bit of a puzzle, but if you have no leaves, and calcium is accumulating in the buds, then it came in at the root. It's just not very efficient anymore.


Now I'm freestyling..
Once deficiency sets in, it may seem logical we can just add more. However changing the Ca at the root, is good reason to need a different type of root system. It's a feed constitute that effects nearly all others. Plants grow roots turned to the environment, so any large changes after the plants given up on it's root system, isn't going to be a great idea. So we really need it right from the start, and that gives the plant something to work with.
I just grow plants, which brushes me up against other subjects. I try and keep to my core need of growing plants, and not delve into chemistry, which isn't a subject I did at school. Nor rural sciences. So as I get further from the practical applications of growing, my knowledge gets thinner. Unless it's towards electrics and construction, where I'm also pretty good.
My knowledge here is therefore very thin.

 

[RuBp]

Piff they are taking up Ca as long as you have new growth at the tips of the roots. Not saying they quit taking Ca up or there is no demand in flower. LJ kept saying roots stop growing in flower and Ca is important in flower, i was just pointed out that they cant uptake it without roots actively growing.

 

[Ca++]

I have coincidentally seen Ca analysis in leaf and bud today, and the lowering of Ca through flower is apparent. I think I saw numbers as high is 4% drop to 2%, though I was just brushing past the graphs, not stopping to have a proper look

 

[RuBp]

When a leaf is forming there is an influx of Ca until it is mature, the influx slows once its mature. If you cut off the supply of Ca then the Ca in the mature leaf is not getting translocated like N,P,K, would. Its because N,P,K can easily move thru the phloem, Ca in the phloem is very low. So no you shouldnt rely on Ca taken up earlier in growth being used later. Ca in the xylem is why its uptake is so dependent on transpiration. More tranpiration=more Ca uptake, provided their is new root growth.
Lj i dont mean to single you out, trying my best to not be a jackass.

 

[Ca++]

I agree the idea of loading is inaccurate, if it's not mobile. And unless that leaf is breaking up, I really don't see any real options for relocation from a leaf. People do keep airing the idea it's semi mobile though, so I won't ignore it.
What we are probably doing early, is getting it right. Setting the standard. Allowing the plant to see the field. And us to see the plants demands. At a time when we can still change our ideas.
Another reason for early inputs is cell strengthening at a time of elongation. A preventative measure, to improve plant health.

What do we know about the stem filling stuff. The white core. Some have spoke of this as storage, but I have not looked at all.

 

[XYZVector]

Yeah growing in coco coir Ca defficencies are very easy. Most coco coir is unbuffered with calcium. Even buffered coco still needs strong doses of Ca when first transplanted all the way upto flower. This is the one nutrient that will destroy your coco grows the quickest if you don't have enough of it in the nutrient water your feeding the plants. I can only imagine the difficulties if amending calcium thru bone meal, gypsum and other sources that have to be broken down by the root micro biome.