Plant Photonics?

I don't know what it is, i thought it was a cal/mag deficiency... What do you think about that?
No heat stress i think, temperature are good for me (24-25degre celsius)
What is a moly deficiency? (Sorry english is a little bit difficult for me^^)

And this is the 210W not the 140w

What is a moly deficiency? ... Molybdenum (Mo)

https://www.rollitup.org/marijuana-plant-problems/216537-self-diagnose-your-plants.html

My opinion -always taken with a grain of salt - is that there's too much ammonium
(or urea decomposing to ammonium,ammonia & diurea ... ) in her "diet"....

N is assimilated in two forms : Nitrate ion (NO3 ) and ammonium ion (NH4 ) .. A healthy ratiobetween them would be somewhere close to 3:1 ,respectively...

There's,probably, a great deal of photosynthesis going on ,with those lights...
So,great amounts of N ,are assimilated,also ....
If ammonium ion is more ,it does not get stored and it is used at once....
But photorespiration and photoinhibition slow down the rates of photosynthesis,at a certain point and afterwards ...
Assimilated N can not be "used" all and being ammonium it can not be stored in the plant's vacuoles (inside cells ) ..
So part of it remains to the leaves(inside cell liquid ) at high concentrations and through osmotic pressure ,dries up the leaves...
( Cell pumps up with water till it explodes =>dead cells =>brown spot areas ...
Rest of transcellular matrix dries up.Water was used by cells which exploded..
And then,water evaporated into atm. air ==>Leaves /leaf tips "curl" ...)
Another part is becoming ammonia and escapes to atmosphere..
(Does it smell ammonia in the grow,sometimes ?
If yes ,it might be a good sign of too much ammonium /urea is used , in the nutrient "diet ".... )..

That's from humble me...

Logodiarrhea...
I get it often from high quality led bud....

stardustsailor said:

My opinion -always taken with a grain of salt - is that there's too much ammonium
(or urea decomposing to ammonium,ammonia & diurea ... ) in her "diet"....

N is assimilated in two forms : Nitrate ion (NO3 ) and ammonium ion (NH4 ) .. A healthy ratiobetween them would be somewhere close to 3:1 ,respectively...

There's,probably, a great deal of photosynthesis going on ,with those lights...
So,great amounts of N ,are assimilated,also ....
If ammonium ion is more ,it does not get stored and it is used at once....
But photorespiration and photoinhibition slow down the rates of photosynthesis,at a certain point and afterwards ...
Assimilated N can not be "used" all and being ammonium it can not be stored in the plant's vacuoles (inside cells ) ..
So part of it remains to the leaves(inside cell liquid ) at high concentrations and through osmotic pressure ,dries up the leaves...
( Cell pumps up with water till it explodes =>dead cells =>brown spot areas ...
Rest of transcellular matrix dries up.Water was used by cells which exploded..
And then,water evaporated into atm. air ==>Leaves /leaf tips "curl" ...)
Another part is becoming ammonia and escapes to atmosphere..
(Does it smell ammonia in the grow,sometimes ?
If yes ,it might be a good sign of too much ammonium /urea is used , in the nutrient "diet ".... )..

That's from humble me...

Click to expand...

Howdy. What advise would you recommend to avoid this and fix this problem ??
Thanks

Hy everybody,

a big thanks for your response, i don't know if you are true stardustsaillor but now the problem is stopped. I don't give anymore N to my plants since your response and it looks like normal now, some leave of the two mad kush are really burnt but the other plants are ok
I flush my baby right now, the kushberry is not ready she's really really slow but i haven"t the choice.
I will post some pics in a few day..

Thanks

RamiX

digimidgi said:

Howdy. What advise would you recommend to avoid this and fix this problem ??
Thanks

Click to expand...

Use a healthy ratio of 3 : 1 ( nitrate : ammonium and/or urea ) ..
Keep the rel.humidity and temps as low as possible..
(urea tends to decompose rapidly into ammonia/ammonium ions under high substrate humidity and high temps.. ) ...

In severe cases of ammonium toxicity ,flushing and lowering temps ,helps a lot...

Thank you man, my plants will be flush for one or two more week and i will get the temp and humidity as low as possible.

Here is some pics :



Grapefruit Krush #1 :



Grapefruit Krush #2 :




Kushberry :



Mad Kush #1 :



Mad Kush #2 :




The Grapfruit Krush #2 will be ready next weeks I think, she smell really really good

Update!!?
Hope these girls bulked out. They look a little on the skinny side.
I start a journal in a week or so.

wow, nice to see others using these panels and with great results. I got a 140w quite a while ago and love it. subbed

Hi guys,

héhéhé my girls have been harvested since a few weeks

The two Grapefruit Krush :
http://img688.imageshack.us/img688/1894/dsc0757i.jpg

Kushberry :
http://imageshack.us/photo/my-images/526/dsc0840a.jpg/

Mad Kush #1 :
http://img401.imageshack.us/img401/6038/dsc0842fl.jpg

Mad Kush #2 :
http://img829.imageshack.us/img829/1223/dsc0843g.jpg

I'm really happy, results are not wonderfull but for me it's enough

Grapefruit Krush #1 : 10g
Grapefruit Krush #2 : 50g
Kushberry : 35g buds are really tiny but so hardshe's the most "heavy"? i'm not sur of this word sorry, but for an idea, i have about the same amount/quantity of Mad Kush#2
Mad Kush#1 : 24g
Mad Kush #2 : 20g

I have pope some new seed, i will do a new topic, not a grow report because it's too difficult for me in english, but i will post some pics.

I start a journal in a week or so

Click to expand...

Can you give me a link?

what s the total power consumption in full flower?

280 panel supposed to be equal to 1000w hps? hmmmmm!!!

http://www.plantphotonics.com/catalog/product_info.php?cPath=27&products_id=33

So I'm looking to buy the 140w panel very soon, can someone confirm if I'll just get one plant underneath it or two, I was going to get the rectangle shaped one? I will be making a tented type reflecting area to suit.

spannerhead said:

So I'm looking to buy the 140w panel very soon, can someone confirm if I'll just get one plant underneath it or two, I was going to get the rectangle shaped one? I will be making a tented type reflecting area to suit.

Click to expand...

Excellent fixture..............PM digimidgi for specifics, only one I know who uses them.

Yes you can have two under her fine