Experiment one:- Far Red, Phytochrome & DWC

[Desertboy]

http://en.wikipedia.org/wiki/Phytochrome

Phytochromes are characterised by a red/far-red photochromicity. Photochromic pigments change their "colour" (spectral absorbance properties) upon light absorption. In the case of phytochrome the ground state is Pr, the r indicating that it absorbs red light particularly strongly. The absorbance maximum is a sharp peak 650–670 nm, so concentrated phytochrome solutions look turquoise-blue to the human eye. But once a red photon has been absorbed, the pigment undergoes a rapid conformational change to form the Pfr state. Here fr indicates that now not red but far-red (also called "near infra-red"; 705–740 nm) is preferentially absorbed. This shift in absorbance is apparent to the human eye as a slightly more greenish colour. When Pfr absorbs far-red light it is converted back to Pr. Hence, red light makes Pfr, far-red light makes Pr. In plants at least Pfr is the physiologically active or "signalling" state.

Using this information and a Far Red LED I intend to grow this AK47 out in a modified aquafarm (Turned it into an MPB essentially) on a lighting schedule of 11.5/9 so the plant goes through 8 circadian rhythms (Plant days) in 7 real days or after 7 real weeks the plant will be on 8 "plant" weeks.

I have another FR lamp which I shall use to extend the hours to 15/9 in a separate tent which is on day 18 at the moment.



Day one of flower

2 600w, 1 AK47, no airstones, flooming only.

 

[Desertboy]

A quick shot of the tent day 18 of flower, there are no fans in this tent intaking or extracting I just leave the tent unzipped a bit at the side and a small circulation fan inside the tent, 1KW obviously.

A picture of 1 of my males I'm going to breed back to the strains in my tent as I feel it's time to stop paying stupid money for seeds and breed my own.

 

[321abc]

Im in for the ride. Thanks for taking up the challenge with something new.

 

[Montannabis]

Nifty sub'ed

 

[dextr0]

Im here for the show too brother....

 

[Desertboy]

I had a timer failure which has meant I can't run reliably what I wanted to save days to compensate this time I' running 15/9 15 hours lights on/9 dark with the FR on briefly at lights off.

This way I can use a standard grasslin timer not a digital which kept losing it's programming. I've been since told I might have a dirty earth not much I can do right now.

I'm having the summer off when I'm moving the grow and rebuilding at ground level at which point I'll run 2 taps from the consumer unit one for heavy load and 1 for the timers.

Or I'll rebuild with computer controlled relays and use a laptop as a brain with temp, humidity and co2 logging and relay controlled.

Last option when I rebuild outside bang an earth rod in the ground to get a clean earth for the timers only.

Unless I misunderstood it's not my wiring but my HPS gear that's causing the timers to fail due to interference on the power line.

 

[Desertboy]

I'm not using FR with the tent after all as it has an AK47 clone in there so it'll be the control.

(A poor control I know) I took this up rather late in the day after the summer I shall do this properly 2 identical flower rooms, clones, co2 control and datalogging.

1 room FR enhanced, 1 the control room without FR.

 

[phenotyper]

I am really interested to see this, I followed the other thread closely. Thanks for sharing your experiment.

 

[Desertboy]

I have also considered just running 12/12 but pulsing the FR during the night period as I've read anecdotal evidence of 12/14 lighting basically cutting a 5-7 days off maturing a 9 week strain.

The FR should essentially give us the same effect with 12/12

My biggest worry is I don't have air con and summers coming I can definitely pull of 12/12 but unsure I can do 15/9 6 weeks from now when it gets red hot. I might be lucky have have a shit summer but we're due a hot one I'm laying money on it.

I might run 15/9 until temperatures become too extreme and drop to 12/12 this might be my only option.

At the moment after timer failure she's been on 12/12 she's only 8-9 days in flower.

I want to pulse the light when I run 15/9 which means cash flow! End of the month.

Not looking forward to my leccy bill.

Roll on October it'll be cold enough to run as much wattage as I could possibly need straight through until May, or 107 Million on the lottery tomorrow night!

 

[Desertboy]

About day 10 of flower due to the timer failure

 

[Desertboy]

These are 5 weeks today into flower hopefully 3 weeks of feeding left then flush for 1 week then harvest.

I have enough food left for 3 weeks I hope it lasts as I don't feel like buying more soil nutes, hydro's my thing.

 

[MediMary]

kick ass

 

[Dr.Trichome]

I know this thread was a long time ago, what happened?