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Titolo:
DISTRIBUTION OF EXTERNALLY APPLIED (NH4-N-15 OR (NO3-)-N-15 IN WHITE LUPINS AT DIFFERENT DEVELOPMENTAL STAGES())
Autore:
MERBACH W;
Indirizzi:
ZENTRUM AGRARLANDSCHAFTS & LANDNUTZUNGSFORSCH,INST OKOPHYSIOL PRIMARPROD,EBERSWALDER STR 84 D-15374 MUNCHEBERG GERMANY
Titolo Testata:
Isotopenpraxis
fascicolo: 2-3, volume: 30, anno: 1994,
pagine: 173 - 178
SICI:
0021-1915(1994)30:2-3<173:DOEA(O>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
ASSIMILATION; TRANSPORT; NITRATE; PLANTS; ROOT;
Keywords:
AMMONIA; GROWTH STAGES; LEAVES; LUPINUS ALBUS L; NITRATE; NITROGEN 15; NITROGEN INCORPORATION; POT EXPERIMENTS; ROOTS; STEMS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
18
Recensione:
Indirizzi per estratti:
Citazione:
W. Merbach, "DISTRIBUTION OF EXTERNALLY APPLIED (NH4-N-15 OR (NO3-)-N-15 IN WHITE LUPINS AT DIFFERENT DEVELOPMENTAL STAGES())", Isotopenpraxis, 30(2-3), 1994, pp. 173-178

Abstract

White lupins (Lupinus albus L., var. Kievsky mutant) were grown in Mitscherlich pots. (NH4NO3)-N-15 or (NH4NO3)-N-15(10 or 95 at%N-15 exc.)was applied at the late vegetative stage (14-16 leaves) or at the generative stage tend of bloom), respectively. Dry weight increase (DeltaDW) of the plants as well as the N-15 distribution in different organs and N fractions (NO3--N, NH2-N, protein N) were investigated after 5days and 50 days (maturity). The following results were obtained: 1. In comparison with the N-15 derived from NO3-,the N-15 derived from NH4+ was more strongly retained in the roots. When transported into the shoot, it was more strongly translocated into the tip. 2. More N-15 derived from NH4+ was incorporated into proteins and reduced soluble N compounds than N-15 derived from NO3-. Even in the above-ground plant tissues, a considerable proportion of the latter was found as NO3-. 3. In the long-term experiment (harvest at maturity 50 days after application), no difference in translocation and incorporation could be foundbetween the two offered N-15 sources.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/09/20 alle ore 22:44:15