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Titolo:
THE AVAILABILITY OF THE NITROGEN IN THE CROP RESIDUES OF WINTER-WHEATTO SUBSEQUENT CROPS
Autore:
HART PBS; POWLSON DS; POULTON PR; JOHNSTON AE; JENKINSON DS;
Indirizzi:
AFRC,INST ARABLE CROPS RES,DEPT SOIL SCI,ROTHAMSTED EXPTL STN HARPENDEN AL5 2JQ HERTS ENGLAND AFRC,INST ARABLE CROPS RES,DEPT SOIL SCI,ROTHAMSTED EXPTL STN HARPENDEN AL5 2JQ HERTS ENGLAND
Titolo Testata:
Journal of Agricultural Science
, volume: 121, anno: 1993,
parte:, 3
pagine: 355 - 362
SICI:
0021-8596(1993)121:<355:TAOTNI>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
N-15-LABELLED FERTILIZER; FIELD CONDITIONS; PLANT-MATERIAL; SOIL TYPE; RECOVERY; N-15; MICROPLOTS; MANAGEMENT; CYCLE; FATE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
22
Recensione:
Indirizzi per estratti:
Citazione:
P.B.S. Hart et al., "THE AVAILABILITY OF THE NITROGEN IN THE CROP RESIDUES OF WINTER-WHEATTO SUBSEQUENT CROPS", Journal of Agricultural Science, 121, 1993, pp. 355-362

Abstract

Three field experiments in Eastern England, in which N-15-labelled fertilizer had been applied to winter wheat, were used to measure the persistence of the labelled N remaining in soil and stubble at harvest and the availability of this N to up to four subsequent wheat crops. A portion of the labelled fertilizer N quickly became stabilized in the soil, with only small and ever-decreasing amounts recovered by subsequent crops. Combining all sites, all years and all applications of fertilizer, 6.6 +/- 1.92 (S.D.) % of the labelled fertilizer remaining in soil (0-70 cm) plus stubble in the year of application was taken up bythe next wheat crop, i.e. by the first 'residual year' crop. A further 3.5 +/- 0.39 % was taken up in the second residual year, 2.2 +/- 0.43 % in the third and 22 % in the fourth. Loss of residual labelled N was more rapid from a sandy soil than from two heavier-textured soils, particularly in the first residual year. After four residual crops on one of the heavier soils (at Rothamsted), 16 % of the labelled N remaining in soil (0-70 cm) and stubble in the year of application had beentaken up by the crops, c. 29 % had been lost from the soil/crop system and 55 % remained in the soil.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/09/20 alle ore 19:08:29