Full TGIF Record # 67823
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DOI:10.4141/P98-113
Web URL(s):http://pubs.aic.ca/doi/pdfplus/10.4141/P98-113
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Publication Type:
i
Refereed
Author(s):Fairey, N. A.; Lefkovitch, L. P.
Title:Crop density and seed production of tall fescue (Festuca arundinacea Screber) 2. Reproductive components and seed characteristics
Section:Agronomy Section: Forage
Other records with the "Agronomy Section: Forage" Section
Source:Canadian Journal of Plant Science. Vol. 79, No. 4, October 1999, p. 543-549.
Publishing Information:Ottawa: Agricultural Institute of Canada
# of Pages:7
Keywords:TIC Keywords: Density; Seed production; Festuca arundinacea; Reproduction; Characteristics; Mesocotyl; Spacing; Seed yield; Growth; Panicles; Seed weight; Seed germination
Geographic Terms:Canada
Abstract/Contents:"The population density and spatial arrangement of plants may influence the productive life and performance characteristics of a perennial grass-seed crop. A study was conducted to determine the effects of the initial density (1.6, 3.1, 6.3, 12.5, 25, 50 and 100 plants m₋₂) and row spacing (20, 40, and 80 cm) of plants on reproductive yield components and seed characteristics of tall fescue (Festuca aruninacea Schreber), over 3 consecutive productions years (1991-1993) in the Peace region of Canada. The weight proportion of cleaned-to-uncleaned seed was 85-86% for the three lowest plant densitites and then decreased, as density increased, to 82% at 12.5 plants m₋₂ and 66% at 100 plants m₋₂. The 1000-seed weight decreased as density increased and ranged from 1.68 to 2.22 g (i.e., 595 000 to 450 000 seeds kg₋₁). The specific seed weight ranged from 18 to 31 kg hL₋₁; it differed among years, but the effect of plant density was inconsistent. The germination capacity of the seed was unaffected by plant density, but differed among years; it averaged 87%, 88% and 59% in 1991, 1992, and 1993, respectively. The seed yield/plant, the number of panicles/plant, and the number of seeds/plant decreased exponentially as plant density increased. The number of clean seeds/panicle decreased, as plant density increased, in the first year but was less affected subsequently, particularly with the 20-cm row spacing. The seed yield was correlated closely with the number of panicles m₋₂ (r=0.659***). An initial density no greater than 25 plants m₋₂ in rows spaced 20-40 cm apart enhanced seed quality by producing a greater proportion of clean seed which had a higher 1000-seed weight. Such a plant density, however is at the low end of the optimum range for maximizing seed yield per unit land area."
Language:English
References:29
Note:Tables
Abstract also appears in French
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Fairey, N. A., and L. P. Lefkovitch. 1999. Crop density and seed production of tall fescue (Festuca arundinacea Screber) 2. Reproductive components and seed characteristics. Can. J. Plant Sci. 79(4):p. 543-549.
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DOI: 10.4141/P98-113
Web URL(s):
http://pubs.aic.ca/doi/pdfplus/10.4141/P98-113
    Last checked: 10/01/2015
    Requires: PDF Reader
    Access conditions: Item is within a limited-access website
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