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Titolo:
A comparison of different N-15 application techniques to study the N net rhizodeposition in the plant-soil system
Autore:
Merbach, W; Schulze, J; Richert, M; Rrocco, E; Mengel, K;
Indirizzi:
Univ Halle Wittenberg, Inst Plant Nutr & Soil Sci, D-06108 Halle, Germany Univ Halle Wittenberg Halle Germany D-06108 Sci, D-06108 Halle, Germany Univ Giessen, Inst Plant Nutr, D-35390 Giessen, Germany Univ Giessen Giessen Germany D-35390 lant Nutr, D-35390 Giessen, Germany
Titolo Testata:
JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE-ZEITSCHRIFT FUR PFLANZENERNAHRUNG UND BODENKUNDE
fascicolo: 4, volume: 163, anno: 2000,
pagine: 375 - 379
SICI:
1436-8730(200008)163:4<375:ACODNA>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
RHIZOSPHERE; NITROGEN; ROOT; EXUDATION; AMMONIA; CARBON;
Keywords:
N-15-rhizodeposition; (NH3)-N-15 fumigation; split-root technique; pot experiment; soil substrate;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Merbach, W Univ Halle Wittenberg, Inst Plant Nutr & Soil Sci, Adam Kuckhoff Str 17B, D-06108 Halle, Germany Univ Halle Wittenberg Adam Kuckhoff Str 17B Halle Germany D-06108
Citazione:
W. Merbach et al., "A comparison of different N-15 application techniques to study the N net rhizodeposition in the plant-soil system", J PLANT NU, 163(4), 2000, pp. 375-379

Abstract

The suitability of three N-15 application methods ((NH3)-N-15 fumigation, split-root technique, N-15 pre-cultivation) for the estimation of N net rhizodeposition (NRD) of wheat plants into soil has been tested and compared under similar conditions and at the same developmental stage. The results were as follows:1. The use of the N-15 tracer technique allows the detection of the net N release by roots under soil conditions. NRD was considerable sind can be estimated to be at least 15 kg N ha(-1) a(-1).2. All three methods applied are practicable under non-sterile experimental conditions. The distribution of applied N-15 in the system and NRD can bebalanced totally only by using the (NH3)-N-15 fumigation and the N-15 pre-cultivation methods. The split-root technique leads to an overestimation ofNRD.3. The split-root technique allows a qualitative separation of the NRD under nearly undisturbed conditions. With the N-15 precultivation, a higher N-15-labelling can be achieved for long-term balance studies.4. Despite the required high N-15 abundance, the (NH3)-N-15 fumigation method works best to evaluate the influence of microbes on NRD and to quantifythe gaseous N-15 release.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 26/09/20 alle ore 14:40:56