Spatial Variability of Nitrogen‐15 and Total Nitrogen in Some Virgin and Cultivated Soils

Broadbent, F. E.; Rauschkolb, Roy S.; Lewis, Kristine A.; Chang, Grace Y.

doi:10.2136/sssaj1980.03615995004400030017x

Cited by 69 publications

(31 citation statements)

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“…Soil N generally has positive values of d 15 N, but there can be exceptions, depending on the ecosystem type (Broadbent et al 1980;Shearer and Kohl 1986;Vitousek et al 1989). Soil 15 N enrichment is generally attributed to a very slight discrimination against 15 N during biological N 2 ®xation combined with a generally larger discrimination against 15 N in N 2 production during denitri®cation; the enzymatic fractionation factor b ranging from 1 to 1.002 for N 2 ®xation (Minagawa and Wada 1986;HoÈ gberg 1997) and from 1 to 1.033 for denitri®cation (Mariotti et al 1982;Yoshida et al 1989;HoÈ gberg 1997).…”

Section: Introductionmentioning

confidence: 99%

Leaf natural 15 N abundance and total N concentration as potential indicators of plant N nutrition in legumes and pioneer species in a rain forest of French Guiana

Roggy¹,

Prévost²,

Gourbière

et al. 1999

Oecologia

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The suitability of the natural N abundance and of total N concentration of leaves as indicators of the type of plant N nutrition in a rain forest of French Guiana were tested. Leaf samples from primary legume species, non-legumes (pioneer species) and from the non-N-fixing species Dicorynia guianensis were analyzed. Both δN and total leaf N varied widely (-1 ?δN (‰) ? 7 and 1 ? leaf N(%) ? 3.2) suggesting possible distinctions between diazotrophic and non-fixing plants. The δN also revealed two statistically distinct groups of non-N-fixing species (δN = 5.14 ± 0.3 vs δN = 1.65 ± 0.17) related to the different ecological behaviors of these species in the successional processes. We conclude that the δN signature of plant leaves combined with their total N concentration may be relevant indicators for identifying functional groups within the community of non-N-fixing species, as well as for detecting diazotrophy. Despite the variability in the δN of the non-N-fixing species, N-fixing groups can still be identified, provided that plants are simultaneously classified taxonomically, by their leaf δN and total N concentration and by the presence or absence of nodules. The variability in the δN of the non-fixing species is discussed.

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Section: Introductionmentioning

confidence: 99%

Leaf natural 15 N abundance and total N concentration as potential indicators of plant N nutrition in legumes and pioneer species in a rain forest of French Guiana

Roggy¹,

Prévost²,

Gourbière

et al. 1999

Oecologia

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“…Consequently, plants taking nitrogen exclusively from the soil might frequently have an 15N abundance different than that of plants assimilating nitrogen from both soil and air (e.g. Broadbent et al 1980;Rennie et al 1976;Ledgard et al 1984;Shearer et al 1978;Shearer and Kohl 1989;Virginia et al 1988). …”

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confidence: 99%

15N natural abundance in plants of the Amazon River floodplain and potential atmospheric N2 fixation

Martinelli

Victória²,

Trivelin

et al. 1992

Oecologia

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TheN natural abundance values of various Amazon floodplain (várzea) plants was investigated. Samples of young leaf tissues were collected during three different periods of the river hydrography (low water, mid rising water and high water) and during one period in the Madeira River (high water). A large variation ofN abundance was observed, both among the different plant types and between the different flood stages. This variation probably, reflected, in part, the highly variable nature of the floodplain, sometimes dry and oxygenated and at other times inundated and anaerobic and, in part, changes in plant nitrogen metabolism. Comparison of the nitrogen isotopic composition of leguminous plants with that of non-leguminous plants showed that, on average, theN abundance was lower in the legumes than non-legumes, suggesting active N-fixation. Also, theN natural abundance in aquatic grasses of the generaPaspalum, was in general, lower than theN abundance of aquatic grasses of the generaEchinochloa. As both of these grasses grow in the same general habitat, it appears thatPaspalum grasses may also be nitrogen fixers.

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“…Other studies have reported impossible %Ndfa values (Sanginga et al, 1990;Hansen and Vinther, 2001), and support the concern of Broadbent et al (1980) that excessive variation in d 15 N can limit the use of the natural abundance method to obtain quantitative estimates of N fixation. Guinto et al (2000) also was unable to estimate N fixation by Acacia sp.…”

Section: Suitability Of the 15 N Natural Abundance Methods At Bmefmentioning

confidence: 76%

Contribution of actinorhizal shrubs to site fertility in a Northern California mixed pine forest

Busse¹,

Jürgensen²,

Page‐Dumroese³

et al. 2007

Forest Ecology and Management

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Spatial Variability of Nitrogen‐15 and Total Nitrogen in Some Virgin and Cultivated Soils

Cited by 69 publications

References 0 publications

Leaf natural 15 N abundance and total N concentration as potential indicators of plant N nutrition in legumes and pioneer species in a rain forest of French Guiana

Leaf natural 15 N abundance and total N concentration as potential indicators of plant N nutrition in legumes and pioneer species in a rain forest of French Guiana

15N natural abundance in plants of the Amazon River floodplain and potential atmospheric N2 fixation

Contribution of actinorhizal shrubs to site fertility in a Northern California mixed pine forest

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