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Title: Exploring the relationship between red edge and chlorophyll content in winter wheat
Author: Pinar, A.
Awarding Body: University College of Swansea
Current Institution: Swansea University
Date of Award: 1994
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The primary objective of the research described in this thesis was to determine if the location of the 'red edge' in a canopy spectrum could be used to estimate the gain yield of winter wheat. However, the red edge and grain yield relationship was indirect and so it was necessary to study the relationship between first red edge and chlorophyll (concentration and content) and then chlorophyll (concentration and content) and grain yield so as to provide the link between red edge and grain yield. The relationship between red edge recorded by an airborne imaging spectrometer and chlorophyll (concentration and content) was determined for grass and bracken during a pilot study, at Llyn Brianne, Wales. A strong positive correlation was found between red edge and chlorophyll (concentration and content). The main study concentrated on the use of a ground-based spectroradiometer in June 1992 and May 1993 to determine the relationship between red edge and chlorophyll (concentration and content) in a uniform wheat canopy at Rothamsted Experimental Station, Hertfordshire. This study site had been subdivided with each subdivision receiving a given nitrogen application and this assured a wide-range of chlorophyll concentrations in one field. In this main study the effect of nitrogen applied to the soil on chlorophyll concentration, plant height, straw weight and grain yield were investigated; in addition the relationships between red edge, chlorophyll (concentration and content) and grain yield were determined. A SPAD chlorophyll meter was also used to test its potential as a non-destructive alternative to wet laboratory assay of chlorophyll concentration.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available