Abstract
Abstract The relative chlorophyll content in leaves estimated by the SPAD‐502 chlorophyll meter can be an efficient way to evaluate plant nitrogen (N) status in many crops and some tree species. In this study, the SPAD meter was used to look for relationships between relative leaf chlorophyll content and leaf nutrient concentration in trembling aspen. The variations in leaf chlorophyll measurements were also evaluated by using three sampling times and three measurement techniques. Hypothetical experimental designs were created to achieve better design efficiency. The best representation of overall leaf chlorophyll was found when six SPAD readings were taken at different locations on each leaf. There was a positive correlation between overall leaf N and estimated chlorophyll content, especially in the top part of the trees. Overall, this study suggested that the SPAD meter can give an estimation of trembling aspen nutritional status, especially if the differential partitioning of N within trees is considered.
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Claims 3
Claim · model-written summary
Six SPAD readings at different locations on each trembling aspen leaf best represented overall leaf chlorophyll.
Verbatim
e0“The best representation of overall leaf chlorophyll was found when six SPAD readings were taken at different locations on each leaf.”
e1“in trembling aspen”
Claim · model-written summary
Overall leaf nitrogen was positively correlated with estimated chlorophyll content, especially in the top of trembling aspen trees.
Verbatim
e0“There was a positive correlation between overall leaf N and estimated chlorophyll content, especially in the top part of the trees.”
e1“in trembling aspen”
Claim · model-written summary
The SPAD meter can estimate trembling aspen nutritional status if nitrogen partitioning within trees is considered.
- Taxon
- trembling aspene0
- Outcome
- estimation of trembling aspen nutritional statuse0
- Qualifier
- especially if the differential partitioning of N within trees is considerede0
Not reportedComparatorValue
Verbatim
e0“the SPAD meter can give an estimation of trembling aspen nutritional status, especially if the differential partitioning of N within trees is considered.”