RELATIONSHIP OF THE RATIO OF CHLOROPHYLL-A TO CHLOROPHYLL-B AND DOUGLAS-FIR SEEDLING NUTRIENT STATUS

Authors
BRACHER GA MURTHA PA
Citation
Ga. Bracher et Pa. Murtha, RELATIONSHIP OF THE RATIO OF CHLOROPHYLL-A TO CHLOROPHYLL-B AND DOUGLAS-FIR SEEDLING NUTRIENT STATUS, Canadian journal of forest research, 23(8), 1993, pp. 1655-1662
Citations number
30
Categorie Soggetti
Forestry
Journal title
Canadian journal of forest research → ACNP
ISSN journal
00455067
Volume
23
Issue
8
Year of publication
1993
Pages
1655 - 1662
Database
ISI
SICI code
0045-5067(1993)23:8<1655:ROTROC>2.0.ZU;2-9
Abstract
One-year-old Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedli ngs were treated with 24 nutrient solutions containing nitrogen, phosp horus, and sulphur levels ranging from 1 to 400 mg/L. After one growin g season, newly matured needles were harvested, and foliar samples ana lyzed for nutrient and chlorophyll concentrations. Several nutrient de ficiencies were diagnosed. A consistent and statistically significant relationship between the ratio of chlorophyll a to b and the severity of nutrient deficiency was not found; consequently, it appears ineffec tual as an index of nutrient stress.