scholarly journals Chemical and isotopic characterization of nitrate retained and leached from soil after manure fertilization-by lysimeter experiments

2019 ◽  
Vol 98 ◽  
pp. 12016 ◽  
Author(s):  
Neus Otero ◽  
Alba Llovet ◽  
Raúl Carrey ◽  
Angela Ribas ◽  
Xavier Domene ◽  
...  
Keyword(s):  
Isotopic Composition ◽  
Soil Fertilization ◽  
Manure Application ◽  
Isotopic Characterization ◽  
N Compounds

Increase of soil fertilization produces an increase of N exported to the hydrosphere. The amount of nitrate that reaches the aquifers is controlled by processes affecting N-species within the soils. The most relevant processes are nitrification, denitrification, assimilation, mineralization, and immobilization. This work studies the fate of N compounds in soil after manure application in a lysimeter study. To this end the isotopic composition of N and O of dissolved nitrate (δ15N-NO3- and δ18O-NO3-) was studied coupled with the evolution of N-compounds retained and leached from the soil. Results showed an increase in the δ15N-NO3- of the leached nitrate towards values similar to the δ15N-NH4+ from the applied manure. The highest δ15N-NO3- values were measured after 100 days of manure application, and thereafter, values decreased progressively towards the initial δ15N-NO3- of the soil before manure application.

Stable isotopic characterization of nitrate wet deposition in the tropical urban atmosphere of Costa Rica

2021 ◽  
Author(s):  
Mario Villalobos-Forbes ◽  
Germain Esquivel-Hernández ◽  
Ricardo Sánchez-Murillo ◽  
Rolando Sánchez-Gutiérrez ◽  
Ioannis Matiatos
Keyword(s):  
Costa Rica ◽  
Wet Deposition ◽  
Urban Atmosphere ◽  
Stable Isotopic ◽  
Isotopic Characterization

scholarly journals Elemental and Isotopic Characterization of Tobacco from Umbria

Metabolites ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 186
Author(s):  
Luana Bontempo ◽  
Daniela Bertoldi ◽  
Pietro Franceschi ◽  
Fabio Rossi ◽  
Roberto Larcher
Keyword(s):  
Stable Isotope ◽  
Economic Value ◽  
Isotope Ratios ◽  
Stable Isotope Ratios ◽  
Umbria Region ◽  
Geographical Regions ◽  
Isotopic Characterization ◽  
First Time ◽  
Micro Elements

Umbrian tobacco of the Virginia Bright variety is one of the most appreciated tobaccos in Europe, and one characterized by an excellent yield. In recent years, the Umbria region and local producers have invested in introducing novel practices (for production and processing) focused on environmental, social, and economic sustainability. Due to this, tobacco from Umbria is a leading commodity in the global tobacco industry, and it claims a high economic value. The aim of this study is then to assess if elemental and isotopic compositions can be used to protect the quality and geographical traceability of this particular tobacco. For the first time the characteristic value ranges of the stable isotope ratios of the bio-elements as a whole (δ2H, δ13C, δ15N, δ18O, and δ34S) and of the concentration of 56 macro- and micro-elements are now available, determined in Virginia Bright tobacco produced in two different areas of Italy (Umbria and Veneto), and from other worldwide geographical regions. The ranges of variability of elements and stable isotope ratios had slightly different results, according to the three geographical origins considered. In particular, Umbria samples presented significantly lower content of metals potentially dangerous for human health. The results of this first exploratory work highlight the possibility of characterizing tobacco from Umbria, and suggest widening the scope of the survey throughout Italy and foreign regions, in order to be used to describe the geographical origin of tobacco in general and verify the origin of the products on the market.

Chemical‐petrographic and isotopic characterization of the volcanic pavement along the ancient Appia route at the Aurunci Mountain Pass, Italy: Insights on possible provenance

2019 ◽  
Vol 34 (5) ◽  
pp. 522-539
Author(s):  
Emiliano Di Luzio ◽  
Ilenia Arienzo ◽  
Simona Boccuti ◽  
Anna De Meo ◽  
Gianluca Sottili
Keyword(s):  
Mountain Pass ◽  
Isotopic Characterization

Ecological and isotopic discrimination of syntopic rodents in a neotropical rain forest of French Guiana

2003 ◽  
Vol 19 (2) ◽  
pp. 209-214 ◽  
Author(s):  
Jean-François Mauffrey ◽  
François Catzeflis
Keyword(s):  
Stable Isotopes ◽  
Isotopic Composition ◽  
Rain Forest ◽  
French Guiana ◽  
Ecological Studies ◽  
Carbon Isotope Ratios ◽  
Photosynthetic Pathways ◽  
Feeding Process ◽  
Neotropical Rain Forest

Stable isotopes are commonly used in ecological studies to infer food resources (Ambrose & DeNiro 1986, Bocherens et al. 1990,1991,1994;Yoshinaga et al. 1991) since isotopic composition is conserved during the feeding process. Moreover,for herbivorous (sensu lato) species, it is often possible to identify the main resource because different photosynthetic pathways generate different values of carbon isotope ratios (Park & Epstein 1961, Sternberg et al. 1984). This allows the characterization of broad biota such as savannas or forest and discrimination of grazers from sympatric folivorous species (DeNiro & Epstein 1978).

Isotopic characterization of waters across chile

2018 ◽  
pp. 205-230 ◽  
Author(s):  
R. Sánchez-Murillo ◽  
E. Aguirre-Dueñas ◽  
M. Gallardo-Amestica ◽  
P. Moya-Vega ◽  
C. Birkel ◽  
...  
Keyword(s):  
Isotopic Characterization

Hydrogeochemical and isotopic characterization of groundwater at Žitný Island (SW Slovakia)

2015 ◽  
Vol 46 (6) ◽  
pp. 929-942 ◽  
Author(s):  
Z. Ženišová ◽  
P. P. Povinec ◽  
A. Šivo ◽  
R. Breier ◽  
M. Richtáriková ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Surface Water ◽  
Danube River ◽  
Water Isotopes ◽  
Anthropogenic Contamination ◽  
The Danube River ◽  
The Core ◽  
Groundwater Reservoir ◽  
Isotopic Characterization

Hydrogeochemical investigations and spatial variations studies on the distribution of water isotopes and radiocarbon in the groundwater of Žitný Island (Rye Island) were carried out. Žitný Island represents the largest groundwater reservoir in Central Europe (about 10 Gm3). The chemical composition of the groundwater of Žitný Island depends mainly on the chemical composition of Danube water, as well as on the length of its infiltration from the Danube River. The groundwater is characterized by potamogenic mineralization, and its chemical composition is influenced by anthropogenic contamination. Sub-surface water profiles showed enriched δ18O levels up to around 20 m water depth, and depleted values for deeper waters. The observed isotopic composition of the groundwater is similar to Danube water, suggesting that the Danube River is the main source of the Žitný Island groundwater. The core of the sub-surface 14C profile represents contemporary groundwater with 14C values above 80 pMC.

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