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

被引:5
作者
BRACHER, GA
MURTHA, PA
机构
关键词
D O I
10.1139/x93-206
中图分类号
S7 [林业];
学科分类号
0829 ; 0907 ;
摘要
One-year-old Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seedlings were treated with 24 nutrient solutions containing nitrogen, phosphorus, and sulphur levels ranging from 1 to 400 mg/L. After one growing season, newly matured needles were harvested, and foliar samples analyzed for nutrient and chlorophyll concentrations. Several nutrient deficiencies 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 ineffectual as an index of nutrient stress.
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页码:1655 / 1662
页数:8
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