Latest / Hydroponics Daily / Phosphorus in Hydroponics

Transcript

Phosphorus in Hydroponics · Hydroponics Daily

• 0:00
  Hi, welcome back to the Hydroponics Daily. Today's subject is phosphorus.
• 0:04
  Phosphorus is another nutrient that's essential. It's required for the synthesis of DNA.
• 0:09
  So obviously something that's required for the synthesis of DNA is going to
• 0:13
  be required for all life on Earth.
• 0:15
  There's no life on Earth that doesn't involve DNA, and it's required for energy production.
• 0:20
  So there's a very short-lived molecule called ATP,
• 0:25
  and ATP contains phosphorus, and that is what's providing the energy to all
• 0:32
  the enzymes and all of the factors in your body in a plant's cells that.
• 0:39
  Require energy so it's not stored as ATP
• 0:42
  it's stored as like fat in my big belly
• 0:45
  or starch in a plant's sugars and
• 0:48
  then their sugars they turn into ATP for driving all
• 0:51
  the chemical productions so phosphorus is essential for
• 0:54
  that so obviously if you don't have enough phosphorus you'll get stunted growth but
• 0:57
  you'll also get purpling of leaves that's the key symptom of
• 1:00
  deficiency not sure why you get purpling of leaves or
• 1:03
  what what it is that's to do with that maybe if you know drop
• 1:06
  me a comment and it's not like a the whole leaf
• 1:09
  goes purple this whole leaf here is not going to go purple you'll just get like
• 1:13
  a mild purpling effect around the margins and that's a symptom that you could
• 1:19
  get you've got phosphorus deficiency by the time that's happened you've gone
• 1:23
  too far and your plant is severely affected so always want to address this beforehand either.
• 1:29
  By using a good nutrient or by doing a
• 1:32
  soil test if you're looking at perennial crops obviously if
• 1:34
  you're growing lettuce there's no point doing soil tests and leaf tissue analysis if
• 1:38
  you're growing a long perennial crop you would it's not just a case
• 1:41
  of not being enough phosphorus it could be that there's calcium lock
• 1:45
  up in the soil and that's causing a an
• 1:48
  issue maybe you've applied too much CalMag
• 1:51
  it is possible it's you have to apply a
• 1:54
  lot to do that but normally that's not the case normally
• 1:57
  it's a high pH issue causing that and especially when
• 2:00
  the high pH is caused by calcium you've got a double bubble there and
• 2:04
  you you'll see phosphorus deficiency in hydroponics
• 2:08
  where people have created a one-part fertilizer and they
• 2:11
  haven't been able to formulate it in a way
• 2:14
  that stops calcium and phosphorus interacting so there
• 2:17
  are a number of products on sale in North america where there's
• 2:19
  like a sludge at the bottom and that's
• 2:22
  calcium phosphate based there is the biggest fertilizer company for home and
• 2:27
  garden that can't be named based fairly close to ohio so we say that they sell
• 2:33
  a one part hydroponics that's just sludge and that's never going to be available
• 2:37
  to your plants that calcium phosphate's been locked up good thing about gold leaf or in.
• 2:45
  We've been able to prevent that negative interaction. The calcium and the phosphorus
• 2:49
  don't interact. They're both available to the plant.
• 2:52
  So phosphorus, very important. The second most important nutrient by volume
• 2:58
  that's required by plants.
• 3:00
  Another thing it's required for that I've missed off this list is root growth.
• 3:04
  They often say phosphorus, phosphoroot.
• 3:08
  And that's why it's so important. So think of nitrogen as leafy growth.
• 3:13
  Think of phosphorus as your roots
• 3:16
  required for really healthy root systems so if you're growing it
• 3:19
  doesn't matter if you're growing a root crop you know big roots
• 3:22
  big fruits as they say and so phosphorus very
• 3:25
  important for that another good source of phosphorus
• 3:28
  is mycorrhizae they their main
• 3:32
  role these beneficial symbiotes their
• 3:35
  main role in in plant growth is absorbing phosphorus
• 3:38
  exuding organic acids out into the
• 3:41
  soil solubilizing phosphorus and bringing it back
• 3:44
  into the plant and then in return the plant gives them 15 of
• 3:47
  photosynthetic assimilates so they wouldn't plants
• 3:50
  wouldn't do that if it wasn't very important and so mycorrhizae are
• 3:54
  very important that in fact if you put a phosphorus fertilizer on a mycorrhizae
• 3:57
  infected plants often the plant will ditch the mycorrhizae and
• 4:02
  the mycorrhizae will just die off because it's got enough phosphorus but in.
• 4:06
  A perennial system mycorrhizae are very important for phosphorus
• 4:09
  nutrition and maintaining mycorrhizae i'd
• 4:12
  always promote mycorrhizae in in hydroponics
• 4:15
  and something we'll talk about later on
• 4:18
  so phosphorus phosphor roots you can always
• 4:21
  good tip you can always spot a rubbish fertilizer
• 4:24
  manufacturer and they'll misspell phosphorus they'll
• 4:27
  put they'll put an o in there phosphorus and the
• 4:31
  reason they do that is because it doesn't get they think
• 4:34
  oh you know lots of lots of words end ruse
• 4:37
  in in science not phosphorus though and spell check won't pick it up you'll
• 4:44
  think you've spelt that correctly because there's a compound called phosphorus
• 4:47
  acid and it's actually spelt with an o in it and so that's why and it's an obscure
• 4:53
  compound that's not used very often
• 4:55
  it's used in the manufacture of one biostimulant and
• 4:58
  that's it really and and so spell check
• 5:01
  won't pick it up as a spelling mistake and they'll think they've spelt phosphorus
• 5:04
  correctly but they haven't and it's a good sign that they're
• 5:07
  idiots playing around with fertilizers that
• 5:09
  shouldn't really be playing around with it so always look out for that extraneous
• 5:14
  extraneous is that the word oh in phosphorus you've got anything else you think
• 5:19
  i've missed about phosphorus anything you think i've got wrong leave a comment
• 5:22
  below and i'm more than happy to chat nonsense with you online. Thank you very much.