5.2 Crop Yield

5.2 Understand the effects on crop yield of increases carbon dioxide and increased temperature in glasshouses.




Rate of photosynthesis -combination of co2 + water -----light/enzyme=me-→ glucose (starch – stored by plant) + o2

Increasing the concentration of co2 = substrate



The rate of photosynthesis will increase which will mean there will be a higher yield up to a certain point when we increase the co2 level.

Increase the temperature:


As we increase the temp there is an increase in the rate of reaction increasing the yield - until it hits a peak that is the optimum temperature.

The both an increase in the yield but both have limits

Increasing temp also
- Helps avoid frost damage
- Provides constant temperatures.