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Titolo:
Net changes in soil and crop nitrogen in relation to the performance of winter wheat given wide-ranging annual nitrogen applications at Ropsley, UK
Autore:
Bhogal, A; Rochford, AD; Sylvester-Bradley, R;
Indirizzi:
ADAS Gleadthorpe, Mansfield NG20 9PF, Notts, England ADAS Gleadthorpe Mansfield Notts England NG20 9PF G20 9PF, Notts, England ADAS Boxworth, Cambridge CB3 8NN, England ADAS Boxworth Cambridge England CB3 8NN orth, Cambridge CB3 8NN, England
Titolo Testata:
JOURNAL OF AGRICULTURAL SCIENCE
, volume: 135, anno: 2000,
parte:, 2
pagine: 139 - 149
SICI:
0021-8596(200009)135:<139:NCISAC>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
FERTILIZER NITROGEN; N-15-LABELED FERTILIZER; MINERAL NITROGEN; FIELD TRIAL; LOSSES; ATMOSPHERE; RESIDUES; CEREALS; HARVEST; AUTUMN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Bhogal, A ADAS Gleadthorpe, Mansfield NG20 9PF, Notts, England ADAS Gleadthorpe Mansfield Notts England NG20 9PF otts, England
Citazione:
A. Bhogal et al., "Net changes in soil and crop nitrogen in relation to the performance of winter wheat given wide-ranging annual nitrogen applications at Ropsley, UK", J AGR SCI, 135, 2000, pp. 139-149

Abstract

The effects of eight rates of nitrogen (N) application (0-245 kg/ha) on the performance of winter wheat over five seasons (1991-1995) on a long-term held experiment (established 1978) at Ropsley (UK) are described. In each of the five seasons, N was withdrawn from replicate plots in order to study the residual effect of fertilizer. N applications in excess of 140 kg/ha left significant residues as soil mineral N (SMN) in the autumn which, despite some loss over-winter, had a significant effect on the yield and N offtake of the subsequent crop. The amount of N carried over was equivalent to 8-20% of the fertilizer N and was observed at N applications up to 40 kg/ha lower than the optimum rate (c. 200 kg/ha). Part of the unrecovered N was also considered to contribute to the long-term build-up of fertility at the site. The results suggest that restrictions on N use to below the optimum will reduce leachable N, but may have an impact on soil fertility and future crop productivity. In addition, the rate of N applied to preceding crops should be taken into account when formulating fertilizer advice on retentive soils.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/09/20 alle ore 16:46:06