Section 2
Chapter 1,746

Accumulation of dry matter in oilseed rape crops in relation to the reflection and absorption of solar radiation by different canopy structures

Leach, J.E.; Milford, G.F.J.; Mullen, L.A.; Scott, T.; Stevenson, H.J.

Aspects of Applied Biology 23: 117-123


ISSN/ISBN: 0265-1491
Accession: 001745616

Download citation:  

The proportions of incident total radiation and PAR intercepted, reflected and absorbed at vegetative, flowering and pod growth stages were measured in rape grown at 3 plant densities and given 0, 100 or 250 kg N/ha in spring at Rothamsted in 1987-89. Canopies composed mainly of developing pods intercepted less radiation than vegetative or flowering canopies. The flowering canopy reflected 25% of total and 10-15% of PAR radiation, much more than vegetative or pod canopies. Reflected radiation was affected by N status but not by plant density. The DM:radiation quotient was greater during pod development than during vegetative growth and was very small during flowering due to the large losses in leaf area at this time.

PDF emailed within 1 workday: $29.90