Transcript Plant production - World of Teaching

Plant production
Watering plants
Why do plants need water?
• Water keeps plants upright and stops
them wilting.
• Plants also need water to make food
and to carry nutrients through them.
• Some plants need lots of water and
others need very little.
Watering methods
• Most plants can be watered from a
watering can, from above.
• Some need to be watered from below,
by standing the pot in a water filled
tray for a few minutes.
Capillary matting
• This is a material that absorbs water
and stays moist.
Pupils made this automatic watering system. Water
drips very slowly out of the tube onto capillary
matting, lining the tray. The plants absorb the water.
Misting Systems
Misting systems produce water spraying droplets
that are smaller than a human hair.
Millions of these tiny droplets hit the surrounding
air, "flash evaporate", and quickly reduce
temperatures 25 to 35 degrees.
Underwatering plants
• Underwatered plants wilt, have dry,
yellow leaves and dry compost.
Overwatering plants
•
If compost or soil is waterlogged, roots are starved
of air.
• Overwatered plants have soft, rotting or mouldy
leaves and slimy compost.
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