ISSN:
1573-5036
Keywords:
Aeschynomene spp.
;
Casuarina spp.
;
Mimosa spp.
;
N2 fixation
;
δ 15N
;
Sesbania spp.
;
tree legumes
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract The leaves and nodules from the shrub and tree legumes, particularly, Aeschynomene spp., Sesbania spp., Mimosa spp. and Leucaena spp., and Casuarina spp. and the leaves from neighbouring non-fixing plants were analyzed for their natural abundances of 15N (δ 15N). The δ 15N in the leaves of non-fixing plants was +5.9% on average, whereas those from shrub legumes and Casuarina spp. were lower and close to the values of atmospheric N2, suggesting the large contribution of N2 fixation as the N source in these plants. The δ 15N values of the leaves from tree legumes except for Leucaena spp. were between the shrub legumes and non-fixing plants, which suggests that the fractional contribution of fixed N2 in tree legumes may be smaller than that in the shrub legumes. Casuarina spp. was highly dependent on N2 fixation. The δ 15N values of the nodules from most of the shrub legumes investigated were higher than those of the leaves.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00011121
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