5.2: Understand the Effects on Crop Yield of Increased Carbon Dioxide and Increased Temperature in Glasshouses

EFFECTS OF CARBON DIOXIDE AND TEMPERATURE ON CROP YIELD:

CARBON DIOXIDE	TEMPERATURE
Graph showing the Effect of Carbon Dioxide on Rate of Photosynthesis	Graph showing the Effect of Temperature on Rate of Photosynthesis
EXPLANATION: As glasshouses are enclosed, Carbon Dioxide concentration can be controlled Farmers can burn Paraffin lamps to increase Carbon Dioxide Levels in Glasshouses As the concentration of Carbon Dioxide increases, the rate of Photosynthesis will increase As Carbon Dioxide is a reactant in Photosynthesis, the increase in Carbon Dioxide concentration will allow more Photosynthesis to occur, hence increasing the rate of Photosynthesis to increase crop yield However, as concentration of Carbon Dioxide increases beyond a certain point, rate of Photosynthesis with plateau as another factor will be the limiting factor - crop yield will halt	EXPLANATION As glasshouses are enclosed, heat from the Sun can be trapped to create a warm climate As temperature increases towards optimum, the rate of Photosynthesis will increase to increase crop yield This is because the increase in temperature towards optimum will allow optimum enzyme activity for Photosynthesis-related enzymes, hence increasing the rate of photosynthesis However, as temperature increases above optimum, enzymes involved in Photosynthesis will denature, therefore causing the rate of Photosynthesis to decrease - crop yield will decrease