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Titolo:
THE RECOVERY OF N-15-LABELED FERTILIZER APPLIED TO MISCANTHUS X GIGANTEUS
Autore:
CHRISTIAN DG; POULTON PR; RICHE AB; YATES NE;
Indirizzi:
IACR ROTHAMSTED HARPENDEN AL5 2JQ HERTS ENGLAND
Titolo Testata:
Biomass & bioenergy
fascicolo: 1, volume: 12, anno: 1997,
pagine: 21 - 24
SICI:
0961-9534(1997)12:1<21:TRONFA>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
WINTER-WHEAT; NITROGEN; SOIL;
Keywords:
BIOFUEL; MISCANTHUS; N CYCLING; N-15-FERTILIZER; N UTILIZATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
11
Recensione:
Indirizzi per estratti:
Citazione:
D.G. Christian et al., "THE RECOVERY OF N-15-LABELED FERTILIZER APPLIED TO MISCANTHUS X GIGANTEUS", Biomass & bioenergy, 12(1), 1997, pp. 21-24

Abstract

Miscanthus is a perennial, rhizomatous grass which has potential for use in Europe as a biofuel crop. Little is known of its fertilizer nitrogen (N) requirements. To better understand the cycling of N within the crop-soil system, a field experiment is being conducted in which 60kg ha(-1) of N-15-labelled fertilizer is being added to Miscanthus plants of different ages. Results reported here are for the recovery, after one growing season, of labelled N applied to one-year-old plants. Harvestable product totalled 7.7 t ha(-1) dry matter. Below ground, the rhizome and root mass increased by 6.2 t ha(-1) compared to the previous year. The crop took up 117 kg ha(-1) N during the year, of which only 23 kg ha(-1) was derived from the labelled fertilizer. Most of this was found in the rhizome plus roots; only 14% of the applied N (36%of the total N taken up) was removed in the harvested crop. At harvest, 20% of the applied N remained in the topsoil (0-23 cm) and < 3% wasfound in the 23-50 cm layer. Almost 40% of the labelled N was lost from the crop-soil system. It seems likely that this loss was by denitrification soon after fertilizer application or by ammonia volatilization from the crop, particularly during senescence. The data indicates that year-old Miscanthus has a low requirement for fertilizer N. In time, information will be available on how effectively fertilizer N is used by more mature plants. (C) 1997 Elsevier Science Ltd.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/20 alle ore 13:20:49