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How does salt affect plant growth?
Transcript of How does salt affect plant growth?
Four plastic cups
Sweet Potato Seeds
The purpose of our experiment is to observe whether salt effects plant growth when salt is left over from roads during cold weather. Variables Manipulated Variables: Plant growth and Number of leaves
Controlled Variables: Sweet Potato Vine, amount of salt in each plant, and soil
Measured Variables: Leaves and Water Background Information:
Salt can potentially kill a plant
Salt may affect the plant growth
Salt travels in the ground water.
We use salt on sidewalks in the winter.
Plants may need salt.
When salt water is exposed to a plant, water moves out of the plant cell to area with fewer water molecules. Osmosis is the reason for this. In osmosis, water moves from areas of high concentration to areas of low concentration. When water molecules move out of the cell, the cell becomes dehydrated. This causes the plant cell not to function problem.
How well plants tolerate salt depends on the type of plant. Some plants can tolerate high levels of salt. Some plants can tolerate low levels of salt. Some plants cannot tolerate salt at all. High salt levels can interfere with germination of new seeds. The salt in the soil can prevent water and nutrients from moving to the roots.
Salt exists in water as ions. Up to a certain amount of ions can be helpful to plants. Too many ions may hurt the plant. Osmosis may only affect less-salt tolerant plants. A lot of salt in the soil may make the soil unable to grow plants. Our Question!!!! How does salt effect plants, animals, and our environment in the Arabia Mountain area as a pollutant? Procedure Conclusion
In conclusion, we found out that the more salt in the solution the more the plant grows. So in nature when salt comes in contact with the plants, the more salt the plant is exposed to, the better it will grow. Plants The End, Thank You & Good-Bye!!!!! Procedure 1 2 3 4 5 6 7 Using a marker and tape label four different cups. You can label them in numbers 1-4, letters a-d, or your own choice. Put a small hole in the bottom of the cup with a pencil. To later allow excess water to flow from the plants so they won’t drown. Fill the cups with approximately
the same amount of potting soil. Add a seed to each cup; press the seed down a little into the soil to moisten it. Add .1m, distilled water, 1m, and .5m to one of the cups do not mix. Place your plants outside where they will get
the same sunlight preferably a greenhouse. Our group wanted to see the effects of all the salts and water mix together so we added another cup with 1.6m of salt and water. Group Members: