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Titolo:
WINTER-WHEAT GROWTH AND NITROGEN DEMAND IN SOUTH COASTAL BRITISH-COLUMBIA
Autore:
BOMKE AA; YU S; TEMPLE WD;
Indirizzi:
UNIV BRITISH COLUMBIA,DEPT SOIL SCI,139,2357 MAIN MALL VANCOUVER BC V6T 1Z4 CANADA AGR CANADA,RES STN AGASSIZ BC V0M 1A0 CANADA
Titolo Testata:
Canadian Journal of Soil Science
fascicolo: 4, volume: 74, anno: 1994,
pagine: 443 - 451
SICI:
0008-4271(1994)74:4<443:WGANDI>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
FRASER VALLEY SOIL; FALL; RECOVERY; ENGLAND; AUTUMN; FIELD; CROPS; SITES;
Keywords:
WINTER WHEAT; N DEMAND; SOIL N SUPPLY; CROP DEVELOPMENT; INTENSIVE CROP MANAGEMENT; LOW INPUT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
21
Recensione:
Indirizzi per estratti:
Citazione:
A.A. Bomke et al., "WINTER-WHEAT GROWTH AND NITROGEN DEMAND IN SOUTH COASTAL BRITISH-COLUMBIA", Canadian Journal of Soil Science, 74(4), 1994, pp. 443-451

Abstract

Winter wheat, Triticum aestivum, is a new crop in south coastal British Columbia. The purposes of this study were to characterize plant development, dry matter accumulation and N uptake under low input and intensively managed systems as well as to assess the capability of some of the region's soils to supply N to the crop. Grain yields, crop development and dry matter and N accumulation were similar to those reported from southern England. High amounts of winter rainfall (November-April precipitation ranged from 523 to 1111 mm) leach virtually all residual NO3 from south coastal B.C. soils and, without N fertilization, result in uniformly N deficient winter wheat. The low input N regime, 75kg N ha(-1) at Zadoks growth stage 31, plus soil N mineralized subsequent to the winter leaching period were sufficient in this study to maximize grain and total aboveground crop dry matter yields, but not to achieve adequate grain protein contents. The soils in the study were capable of supplying N in amounts sufficient to support only 30-53 % ofthe maximum N uptake between growth stages 31 and 78. Appropriate quantities and timing of N are critical to successful production of high-yielding, good-quality wheat in south coastal British Columbia. Nitrogen management is likely to be most efficient when guided by the stage of crop development and demand and not by spring soil sampling and mineral N analysis.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 13:38:52