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Effect of light intensity on germination and plant growth

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Halle Khalifa

on 7 May 2015

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Transcript of Effect of light intensity on germination and plant growth

Effect of light intensity on germination and plant growth
Experimental procedure
Next, take your bean seeds you were supposed to bring and lay them in the middle of the dirt on the top of the soil. Take your pointer finger and push the seed down until your second knuckle on your finger is emerged in the soil.
Experimental procedure
Then, you should water your plants so you can help the germination process. Well water will work.
Natural light day one
40 watt lamp day one
25 watt lamp day one
Experimental procedure
First you should prepare yourself for the experiment. You should have 5 plastic cups, a 25 watt light bulb, a 40 watt light bulb, two lamps, dirt, and green bean seeds.
Day one under growth light
Experimental procedure
Then, place one in complete darkness where there is zero light. Placing it in a room in a basement or closet would be best.
Experimental procedure
Finally, place the last one in a window so it can receive natural sunlight.
Experimental Procedure
Next, you want to have your lamps prepared with the different light bulbs in them. Place one under the 40 watt lamp and another under the 25 watt lamp.
Experimental procedure
Line the 5 plastic cups so you can pour your soil in them. You should fill your cups full but leave a little space at the top of the cup so it's not over flowing.
Experimental Procedure
Next place another plant cup under the growth lights in the science room or where ever you have a set of growth lights.
Well to start off, every plant needs sunlight or some type of light right? Well in this experiment we tested how much light a plant can actually take by testing it with a 25 watt light bulb, 40 watt light bulb, complete darkness, natural sunlight, and the other under the growth lights in the science room. The ones that ended up growing the best were the ones in the natural sunlight and the one under the growth lights. I believe they grew the best because, they were given the right amount of light, and the other ones were given to much, or none at all.
Experimental procedure
Be sure you are watering the plants everyday and you're taking observations everyday whether it be taking pictures or writing it down to keep track.
Week Two Progress
Week Three Progress
Week Four Progress
I went on with this experiment for about a month and a half, and the results I came out with mind boggled me. All of my plants grew but one, and that was the one under the growth lamp in the science room. I'll explain more in my conclusion.
In this experiment it came out a little on how I expected it to come out. The plant under the 45 watt light bulb in the end wilted and started dying. I think that happened because, there was to much light for it to actually take in so it just started dying off. The plant under the 25 watt light bulb ended up living but it looked as if it was going to start wilting to because, it was still to much light for it to actually handle as well. The plant under the growth lamp didn't end up growing at all. I believe the reason it didn't grow was because, it wasn't being forced to grow, and it was to cold for it to start sprouting. The plant in the closet did start sprouting, but as it continued to grow it got really long. It didn't look healthy at all. The reason I believe that it started getting long was because, it was searching for that light, and that was it's only way to find it. The one that grew the best and looked the healthiest was the plant in Becky's window. It grew the best because, it had that natural sunlight, and it was getting the essential nutrition it needed from the sun. It was green and vibrant while the others were a very light green and not healthy. Overall this experiment ended up coming out as I thought it would.
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