ISSN:
1573-5036
Keywords:
Alnus rubra
;
Cytisus scoparius
;
Growth
;
N2 fixation
;
Precommercial thinning
;
Pseudotsuga menziesii
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary From acetylene reduction assays over a 10-month period starting in April 1979, nodule activities averaged 18.78 (se 4.67) μmoles C2H4 g nodule dw−1 h−1 forAlnus rubra and 59.95 (se 12.14) μmoles C2H4 g nodule dw−1 h−1 forCytisus scorparius. Plant rates were 1.91 (se. 47) μmoles C2H4 plant−1 h−1 forA. rubra and 0.55 (se. 17) μmoles C2H4 plant−1 h−1 forC. Scoparius. Plant activity and total leaf N were strongly correlated with the dw of other plant parts, but nodule activity and percent leaf N were not. Plant and nodule activities were not associated with temperature, moisture stress, precipitation events or percent light for either species over the growing season nor for 54A. rubra sampled in mid-season 1979 on one replication. After 5 to 6 growing seasons, 14A. rubra on the same site ranged from 30 to 332 cm in height and showed strong correlation between nodule dw, leaf dw, plant size and total leaf N. Results from this study and others indicate logistic equations may be modified to predict the effect of adding a N2 fixing plant to a population of non N2 fixing trees.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02277853
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