Factors Affecting Plant Growth 16.1. Soil – Broken rock (erosion, etc) – Humus Decomposing...
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Transcript of Factors Affecting Plant Growth 16.1. Soil – Broken rock (erosion, etc) – Humus Decomposing...
Factors Affecting Plant Growth
16.1
Soil– Broken rock (erosion, etc)– Humus
• Decomposing organic matter.– acts to bind mineral particles together and retain water and atmospheric
gases.– Provides some nutrients for plants.
– Living organisms• Plants, ,animals, fungi, and micro-organisms. • The total mass of organisms living in the soil is much greater than
the sum of mass of all organisms above ground.
– Air• Network of spaces created by roots and movement of animals
such as earthworms.
– water
Factors affecting Growth
• Growth regulators – ie. gibberellin, auxin, etc.• Nutrients• Sunlight• Water• acidity
1) Nutrients
• Essential nutrient: materials that a living thing needs to make its own structures and obtain energy for survival.– Organism can not make them themselves. Ex/
humans need to injest vitamin C and glucose. Plants can make these, so they are not ‘essential’ for them.
• Essential Nutrients of Plants:– Carbon dioxide• Land plants acquire
from air.• Water plants from
soil.
– Water• From soil.
– 6 soil elements
• Thinking Lab, Page 585– #1 - #6.
2) Sunlight
• Equation for Photosynthesis:
• What would happen to the production of glucose if there was limited sunlight?
• How would limited glucose levels affect a plant’s growth?
3) Water
• What affect(s) would insufficient water supply have on a plant? Why?
• Read the ‘Pause/Record’ on page 588. What do you think?
Section Expectations
• Understand the role of each of the following in terms of plant growth and survival– Essential minerals/soil– Animals in soil– Water– Carbon dioxide
• Understand the four nutrient cycles.
Homework
Page 591, #2, 4, 5, 6