Full TGIF Record # 69214
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Web URL(s):https://dl.sciencesocieties.org/publications/aj/pdfs/92/5/967
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https://dl.sciencesocieties.org/publications/aj/articles/92/5/967
    Last checked: 12/14/2016
    Access conditions: Item is within a limited-access website
Publication Type:
i
Refereed
Author(s):Valente, Maria Eugenia; Borreani, Giorgio; Peiretti, Pier Giorgio; Tabacco, Ernesto
Author Affiliation:Valente and Peiretti: Centro di Studio per 1'Alimentazione degli Animali in Produzione Zootecnica, Torino, Italy; Borreani and Tabacco: Department Agronomia, Selvicoltura e Gestione del Territorio, University of Turin, Turin, Italy
Title:Codified morphological stage for predicting digestibility of Italian ryegrass during the spring cycle
Section:Forages
Other records with the "Forages" Section
Source:Agronomy Journal. Vol. 92, No. 5, September/October 2000, p. 967-973.
Publishing Information:Madison, WI: American Society of Agronomy
# of Pages:7
Keywords:TIC Keywords: Digestibility; Lolium multiflorum; Morphology; Canopy; Growing degree days; Nitrogen fertilization; Classification; Life cycle; Spring; Forage crops; Growth stages; Comparisons; Fertilization rates; Flowering; Emergence; Temperatures; Models
Cultivar Names:Asso; Barverdi; Tribune; Caramba; Barmultra; Malmi
Geographic Terms:Po Valley, Italy
Abstract/Contents:"A precise prediction of changes in digestibility of grasses during the growth cycle would allow targeting of harvests to desired levels of nutritive composition to meet specific animal requirements. In this study, regression analysis was used to formulate and test prediction equations for organic matter digestibility (OMD) of standing crops of Italian ryegrass (Lolium multiflorum Lam.) with codified morphological stage, canopy age, growing degree days (GDD), and N fertilization as independent variables. The field study was conducted for 7 yr with six Italian ryegrass cultivars, diversified for ploidy and earliness, grown in the western Po Valley (Italy). Nitrogen fertilizer was applied at various rates as top dressing. Sequential harvesting from early vegetative to full flowering provided herbage samples (n=153) varying in age and stage of development. The 0-400 classification system that was used to evaluate the morphological stage included four primary stages: vegetative, elongation, inflorescence emergence, and flowering. The OMD decreased from 928 to 576 g kg⁻^D1
Language:English
References:40
Note:Tables
Graphs
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Valente, M. E., G. Borreani, P. G. Peiretti, and E. Tabacco. 2000. Codified morphological stage for predicting digestibility of Italian ryegrass during the spring cycle. Agron. J. 92(5):p. 967-973.
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Web URL(s):
https://dl.sciencesocieties.org/publications/aj/pdfs/92/5/967
    Last checked: 12/14/2016
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
https://dl.sciencesocieties.org/publications/aj/articles/92/5/967
    Last checked: 12/14/2016
    Access conditions: Item is within a limited-access website
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