Journal of Food, Agriculture and Environment

Vol 7, Issue 2,2009
Online ISSN: 1459-0263
Print ISSN: 1459-0255

Genotype and planting date effects on cotton growth and production under south Portugal conditions – III. Boll set percentage, boll location, yield and lint quality


Gonçalo Barradas 1*, Rafael J. López-Bellido 2

Recieved Date: 2009-01-10, Accepted Date: 2009-04-05


Assimilate diversion of vegetative growth, reinforced by inadequate temperatures to growth and maturation of bolls later set in season, resulted in poor harvest indexes and low retention, mainly at the first fruit positions and on lower fruiting branches. Significant differences of seed-cotton production between genotypes were observed, and higher values were attained by variety Celia, presenting more short season characters. The delaying of the planting date, while allowing better emergence and initial growth of the plants, shorten the available growing season and has a negative impact on seed cotton production. Thus, in Caia region, short season cultivars and early planting dates are best suited to cotton production, also being important to achieve high boll retention in the first positions and fruiting branches, in order to approach the boll growth and maturing period with more favourable environmental conditions. Fiber color grading shows no significant differences between varieties and planting dates, although differences were found in some of the commercial and technological quality measurements.


Gossypium hirsutum, boll retention, fiber yield, fiber quality

Journal: Journal of Food, Agriculture and Environment
Year: 2009
Volume: 7
Issue: 2
Category: Agriculture
Pages: 322-328

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