Lecture 14 Flashcards
Plants produce energy from photosynthesis by capturing what
Sunlight
What is light energy converted to in photosynthesis
Chemical energy (carbon based compounds)
What is the final product of photosynthesis
Simple sugar glucose which is later converted to more complex compounds
What is growth
New leaves, height increase , biomass
What is plant development
•as the life cycle starts (seed germination) moves through key phases / stages and reaches maturity (harvest – of seed).
•Plant Development - vegetative and reproductive (floral)
What are leaves and stem produced from
The shoots
When the seed germinates what does it produce
The Shoots and Roots
During the spring what does the shoot apex become
An inflorescence and the plant changes from vegetative to floral
Example of a determinate plant
Wheat
What is a determinate plant
the shoot apex becomes an inflorescence and the change from vegetative to floral determines: number of leaves on the m.s. and tillers.
Influenced by
•Variety
•Day length
•Vernalisation
Name the growth stages in zadocks scale
•Seedling
•Tillering
•Stem Elongation
•Booting
•Ear Emergence
•Flowering
•Milk Development
•Dough Development
•Ripening
What does zadocks scale range from
10-93
When will the key leaves in the cereal crop canopy start to emerge
GS 31
GS 31 is a key timing in crop management give examples
–Nutrient Application – Nitrogen
–Growth regulation ( PGR) straw shortener
–Fungicide applied for control of fungal diseases
–Herbicide use to control problem weeds
What do pesticide labels specify
The correct growth stage to apply agrochemicals
