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Titolo:
Relationship between plant density and yield for two spring cultivars of oilseed rape (Brassica napus L.)
Autore:
Al-Barzinjy, M; Stolen, O; Christiansen, JL; Jensen, JE;
Indirizzi:
Royal Vet & Agr Univ, Dept Agr Sci, DK-1871 Frederiksberg C, Denmark RoyalVet & Agr Univ Frederiksberg Denmark C 71 Frederiksberg C, Denmark
Titolo Testata:
ACTA AGRICULTURAE SCANDINAVICA SECTION B-SOIL AND PLANT SCIENCE
fascicolo: 3, volume: 49, anno: 1999,
pagine: 129 - 133
SICI:
0906-4710(199909)49:3<129:RBPDAY>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
COMPETITION;
Keywords:
non-linear regression; parameter estimation; sowing rate; transformations;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
14
Recensione:
Indirizzi per estratti:
Indirizzo: Al-Barzinjy, M Royal Vet & Agr Univ, Dept Agr Sci, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark Royal Vet & Agr Univ Thorvaldsensvej 40 Frederiksberg Denmark C
Citazione:
M. Al-Barzinjy et al., "Relationship between plant density and yield for two spring cultivars of oilseed rape (Brassica napus L.)", ACT AG SC B, 49(3), 1999, pp. 129-133

Abstract

Yield/density relationships of two spring cultivars of oilseed rape were investigated under five different plant densities. Densities ranged from 20 to 130 plants m(-2). Three response variables, number of pods per plant, seed weight per plant and dry matter per plant, were studied using different regression models to examine their relationship with density. Transformations were used to improve the fit of the models. Pods per plant, seed weighs and dry matter per plant decreased as plant density increased. Seed weight and dry matter m(-2) responded similarly to varying plant density for the two cultivars. For all response variables, the inverse exponential model gave the best fit to the data, indicating the existence of an optimum density,which was about half the official recommended sowing density.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/07/20 alle ore 00:10:17