Thursday 25 April 2013

5.2 understand the effects on crop yield of increased carbon dioxide and increased temperature in glasshouses

Glass houses and polythene tunnels increase the heat in the environment that crops are growing in. Reactions happen faster when there is more heat, for example photosynthesis. Given photosynthesis produces energy that the plant needs to grow, if there is more heat there is more growth and so higher yield.

Carbon dioxide is a reactant in photosynthesis. If there is a more than enough carbon dioxide, then every plant will be able to photosynthesise as best as it can. The more photosynthesis the more glucose, the more glucose the more energy, the more energy the more growth. Hence crop yield is increased.

12 comments:

  1. Is it so that if the temperature are very high then the rate of photosynthesis may decrease as well?

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    Replies
    1. Yes, good point, if the temperature became too high then the plant would not be able to function properly (enzymes involved in reactions would denature).

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  2. This is unbelievably helpful, thanks so much!

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  3. The Biology Syllabus has changed…

    Here is a New blog for the 2017 Syllabus:

    http://igcse-biology-2017.blogspot.hk

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  4. more at

    http://igcse-biology-notes.blogspot.hk/2017/06/52-understand-effects-on-crop-yield-of.html

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  5. Thx a bunch hannah, you answered better than Google

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  6. thank you so much im only in 7th grade but still extremely clear to understand and clear information

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  7. and to be honest I only used this website because im doing a worksheet lol

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  8. what happens if there is too much carbon dioxide? will this decrease the crop yield?

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  9. It's very useful...thanks a lot

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