Announcement

Collapse
No announcement yet.

The affect differernt day/night temp has on crop

Collapse
X
Collapse
 
  • Page of 1
  • Filter
  • Time
  • Show
Clear All
new posts
Previous template Next
    #1

    The affect differernt day/night temp has on crop

    Hi.. Here's another study from the National university of Daejeon In Korea. The differens in THC levels with just a couple degrees changes are remarkable
    Optimizing Indoor Hemp Cultivation Efficiency through Differential Day–Night Temperature Treatment
    https://doi.org
    This study was conducted to determine the optimal temperature difference in day–night indoor cultivation conditions to enhance the flower yield and functional component contents of female hemp plants. Hemp clones were cultivated under five distinct day and night temperature differences (DIF) during the reproductive stage. The daytime and nighttime temperature settings were as follows: 18:30 °C (negative 12 DIF), 21:27 °C (negative 6 DIF), 24:24 °C (0 DIF), 27:21 °C (positive 6 DIF), and 30:18 °C (positive 12 DIF). Seven weeks after transplantation, the growth parameters, leaf gas exchange, total phenolic compounds, 2,2-diphenylpicrylhydrazyl scavenging activity, and cannabinoid contents were analyzed. The total shoot biomass based on dry weight was highest at 21:27, reaching 41.76 g, and lowest at 30:18, measuring 24.46 g. However, the flower biomass, which is the primary production site, was highest at 24:24 and lowest at 18:30, showing a 4.7-fold difference. The photosynthesis-related parameters were temperature-dependent and strongly correlated with biomass production. The cannabinoid content of the hemp leaves increased at 21:27, whereas that of the hemp flowers increased at 27:21. The findings of this study indicate that the optimal temperature condition for female hemp flower production in a limited space is positive 6 DIF treatment, which corresponds to 27:21 °C. These results can contribute to advancements in indoor crop cultivation technology.
    Tags: None
    #2
    Another study shows both yield and THC % is maximised when the ambient temps are brought down even further in mid and late flower, to an ideal temp of 22⁰C air temp (not measurered under the lights) in late flower. These low temps support a healthy VPD at very low humidity which further enhances THC % in late flower.

    The study you refer shows best results at the lowest temps also.

    It's expensive getting to those low temps with low humidity but it does produce exceptional quality dense potent buds.
    Flower Room: 11' x 7' x 7.5'H, 480w AC, 13gal/day dehumidifier, 1.5gal ultrasonic humidifier, 60gal (27gal usable) nute tank, 16" pedestal fan & 18" wall fan. Lighting and climate automated. Hand watering.
    Veg Cupboards: ​​​​​​Two 4x2x6H cupboards. SF2000 Evo in one SF7000 in other. Climate controlled and automated. Hand watering
    Aeroponics Low Pressure Bucket: 20W LED. 5 clones & 20W LED 11 clones
    Lights: Mars Hydro FC-E1200W, SF-7000, SF-2000 evo in flower room.
    Medium: Coco/perlite, 7.2gal pots, no drains
    Current Grow: ​​​5 x Photos Franklin's Orange Zkittles x Sour Diesel in flower room, 3 Franklin's White Widow x Sour Diesel Clones, 13 x Orange ZkittleZ x Sour Diesel clones in Aeroponics buckets x 2.
    Last Grow: A mix

    Comment

    • Bumpkincorn
      #2.1
      Bumpkincorn commented
      09-01-2024, 10:30 AM
      Editing a comment
      Well i suppose it depends on where you live.:-) For me, the highest cost is getting the temp up..
    #3
    What the hell is a doi.org? You talking to AI, Bluey? Helluva second post following a helluva first post.
    C'mon, mule!

    Coco/perlite
    3x3x6
    • Likes 1

    Comment

    • Bluey
      #3.1
      Bluey commented
      08-29-2024, 08:42 PM
      Editing a comment
      Department of Industry perhaps?

      I didn't click on the link or read the study though.

      You might be right re AI. Don't know.
    #4
    Yet another study shows if I keep stuffing and puffing on me pipe I'm gonna get stoned as hell
    • Likes 1

    Comment

    • Gingerbeard
      #4.1
      Gingerbeard commented
      08-29-2024, 09:58 PM
      Editing a comment
      Dab, you fool! Dab!
    • bdeegan
      #4.2
      bdeegan commented
      08-30-2024, 05:18 AM
      Editing a comment
      I see you’ve found your pipe sir
    #5
    Me and me pipe are one.

    Comment

      #6
      Ahhh sorry , what were we talking about ?
      3 Photos
      KIS mix organic living soil from Black Sallow soils in 7gal. pots
      Black Swallow Organic Bloom mix top dress before flower.
      Reusing soil with Black Swallow nutrient pack between grows
      Maybe some compost teas
      Blumat watering system
      Microbial Mass and other microbial boosters(Wallace)
      3x4x6’ tent
      Photontek 465wpro
      6” AC Infinity outdoor air in and out, humidifier, dehumidifier, heater, oscillating fan.
      Inkbird controllers heat/humidity​

      Comment

      • dirtymike
        #6.1
        dirtymike commented
        08-31-2024, 11:43 AM
        Editing a comment
        Dabber, I need a press bad !!
    Previous template Next

    Check out our new growing community forum! (still in beta)

    Subscribe to Weekly Newsletter!

    Working...
    X