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Argument: Climate Change is Serious - Coggle Diagram
Argument: Climate Change is Serious
Phenology & Crop Growth
Temperature
Crop yield
Effect large areas
Tropics
Negative
Maize
Wheat
Positive
Rice
Positive
Soybean
Wheat
Temperate
Positive
Maize
Negative
Rice
High effect Tropics
Adaptation
Crops
Varieties
Sorghum
Sorghum should be a fairly safe crop
Water Stress still constriant
CO2 fert will recue
High temp stress increase
Genetic improvement heat tolerance
understand microclimate within canopy as it affec ts crop temps stress needed.
Timing of Spowing
Crop Calender
Planting
away from excess rain, low temp
Flowering
away from heat, frosting
Harvest
in dry conditions, away from rain, hail
Irrigation
Residue Management
Cultivation
No Till
Broad scale changes
Double Cropping, etc.
Case Study
Riverina Rice
Sowing
Only when water is available
Cotton Popular
Drought
Forced out annual crops in place of perennial
Aerobic Rice
Cold Tolerance
Water depth over 25cm acts as a buffer against temperature change
Remove water
Cold tolerance issue
1 more item...
Heat tolerance
1 more item...
Temperature tolerance
Slightly different for heat and cold
1 more item...
Increase Rooting Depth
Highest Yielding variety only has shallow roots
Narrow root angles
Yield Increase
Deeper Rooting Need to be able to Increase in yield capacity
Conclusion
Traits for
3 more items...
Canopy-to-air Differential
Lower CtA Diff assoc. narrow rt angle
Models
Models
Temp and Yield Relationship
Mineralisation
High uptake N
High Temp.
More Tropical
Less benefit from N
Use less
Less Tropical
N Benefit increase
Potential to use more?
Key (+) Benefits
Early Sowing Varieties
Less Yield Penalty
Tropical benefits are less
Benefits are greater in Temperate areas
Key (-) impacts
Temperature
Av min temp
Frequency temp Ext.
Av. daily temp
Rainfall
Frequence Ext. Rainfall