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Influence of N doses and form on ¹⁵N natural abundance of pepper plants: considerations for using δ¹⁵N values as indicator of N source.
- Source :
-
Journal of the science of food and agriculture [J Sci Food Agric] 2011 Sep; Vol. 91 (12), pp. 2255-8. Date of Electronic Publication: 2011 May 05. - Publication Year :
- 2011
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Abstract
- Background: The aim of this study was to ascertain the effect of the N form (NO(3) (-) , NH(4) (+) and organic N) and N concentration on plant isotopic fractionation and on the contribution of the different N sources to the plant N budget, in order to evaluate the feasibility of using plant δ(15) N values for discriminating between conventional and organic crops. To this end, different N concentrations (applied as NO(3) (-) ), N forms (NO(3) (-) versus NH(4) (+) ), and increasing NO(3) (-) applications to an organic N-based fertilization regime were studied.<br />Results: When using NO(3) (-) as N source, intra-plant fractionation was significant and tended to increase when NO(3) (-) concentration increased in the root medium. However, negligible net isotopic fractionation was observed when comparing theoretical and measured plant δ(15) N values. On the other hand, when plants are fertilized with a mixture of NO(3) (-) and NH(4) (+) , differences in uptake patterns for both salts could result in variation in plant δ(15) N regarding to the expected value. Finally, the application of NO(3) (-) to plants was detected when it was combined with high levels of organic N sources, from 99:1 organic:inorganic N ratio.<br />Conclusion: Under certain conditions and following some considerations concerning sampling, δ(15) N values can be considered to be a potential tool to guarantee the authenticity of organic products.<br /> (Copyright © 2011 Society of Chemical Industry.)
- Subjects :
- Algorithms
Feasibility Studies
Manure
Nitrates metabolism
Nitro Compounds metabolism
Nitrogen Compounds metabolism
Nitrogen Isotopes
Plant Roots metabolism
Plant Shoots metabolism
Quaternary Ammonium Compounds metabolism
Capsicum growth & development
Capsicum metabolism
Fertilizers
Food Inspection methods
Food, Organic analysis
Fruit metabolism
Nitrogen Cycle
Subjects
Details
- Language :
- English
- ISSN :
- 1097-0010
- Volume :
- 91
- Issue :
- 12
- Database :
- MEDLINE
- Journal :
- Journal of the science of food and agriculture
- Publication Type :
- Academic Journal
- Accession number :
- 21547922
- Full Text :
- https://doi.org/10.1002/jsfa.4447