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Titolo:
Yield response of forage grasses to N fertilizer as related to spring soilnitrate sorbed on anionic exchange membranes
Autore:
Ziadi, N; Simard, RR; Allard, G; Parent, G;
Indirizzi:
Univ Laval, Fac Sci Agr & Alimentat, Dept Phytol, St Foy, PQ G1K 7P4, Canada Univ Laval St Foy PQ Canada G1K 7P4 pt Phytol, St Foy, PQ G1K 7P4, Canada Agr & Agri Food Canada, Soil & Crops Res & Dev Ctr, St Foy, PQ G1V 2J3, Canada Agr & Agri Food Canada St Foy PQ Canada G1V 2J3 t Foy, PQ G1V 2J3, Canada
Titolo Testata:
CANADIAN JOURNAL OF SOIL SCIENCE
fascicolo: 1, volume: 80, anno: 2000,
pagine: 203 - 212
SICI:
0008-4271(200002)80:1<203:YROFGT>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
NITROGEN MINERALIZATION; SILAGE CORN; AVAILABILITY; TEMPERATURE; MOISTURE; WHEAT;
Keywords:
N fertilizer; nitrate; grass; economically optimum N fertilizer rate;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
43
Recensione:
Indirizzi per estratti:
Indirizzo: Ziadi, N Univ Laval, Fac Sci Agr & Alimentat, Dept Phytol, St Foy, PQ G1K 7P4, Canada Univ Laval St Foy PQ Canada G1K 7P4 , St Foy, PQ G1K 7P4, Canada
Citazione:
N. Ziadi et al., "Yield response of forage grasses to N fertilizer as related to spring soilnitrate sorbed on anionic exchange membranes", CAN J SOIL, 80(1), 2000, pp. 203-212

Abstract

Soil N availability is an important factor in forage grass production. Maximising N fertilizer efficiency is essential to improve profitability and to reduce the environmental risk associated with residual excess soil N. Theobjectives of this study were (i): to determine the effects of N fertilizer on yield, N uptake and NO3-N concentration of forage grasses produced in Western Quebec; and (ii) to compare spring soil NO3- measured by anionic exchange membranes (NO3AEMs) and by water extraction (NO3w) as a criterion topredict fertilizer N requirements of forage grasses. The yield response ofgasses, especially timothy (Phleum pratense L.), to different rates of NH4NO3 (0 to 240 kg N ha(-1)) on heavy clay soils (Humic Gleysols) was studiedfrom 1994 to 1996 at four sites in the Abitibi-Temiscamingue area, Quebec (Canada). Nitrogen significantly (P < 0.001) increased forage yield, N uptake, and NO3-N concentration. The economically optimum N fertilizer rate (Nop) for forage yield varied from 25 to 240 kg N ha(-1) depending on sites and years, and averaged 125 kg N ha(-1). The Nop can be predicted more adequately by NO3AEMs (R-2 = 0.45) than by NO3w (R-2 = 0.09). Based only on the relationship between the relative yield and spring soil nitrate, NO3AEMs could be used as a criterion for fertilizer N recommendation of forage grassesin this cool continental climate.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 00:52:00