Influence of Row Spacing and Planting Dates on some characters (field and quality) of Sunflower cultivars (Helianthus annuus L.).
Mesopotamia Journal of Agriculture,
2012, Volume 40, Issue 3, Pages 243-254
AbstractField experiment was conducted at the collage farm of Agriculture and forestry – Mosul Univ. during 2004 season to study the effect of four Planting dates (20 and 30 May , 9 and 19 June) and two row spacing between lines (50 and 75 cm) on growth , yield and quality of three sunflower genotypes (cultivar Flammi , hybrid Euroflor and Local cultivar). The Planting dates showed significant effects on the studied traits, Delaying of sowing date (19 / 6) Showed delaying in flowering and maturity but first sowing date was superiority in oil percentage and oil yield. The fourth sowing date showed highest rate in protein percentage. Row spacing ( 50 cm ) had gave a high value of protein percentage. Genotypes showed significant differences among them in terms of quality traits where the local cultivar in the oil yield. The results showed delaying in flowering and maturity for the local cultivar but surpassed in oil yield. The impact of planting dates and genotypes was significantly in the studied traits, where the local cultivar was late in flowering and maturity at the time of the fourth planting date. The hybrid Euroflor gave the highest value of oil yield in the first and second planting dates. The cultivar Flammi was superior when planted in the fourth date in the percentage of protein. The highest percentage of protein was in plants that planted at a distance of 50 cm at the time the fourth date. The highest percentage of oil was in Euroflor when planted at a distance of 75 cm. Flammi cultivar gave the highest percentage of protein when grown in the last date at a distance of 50 cm.
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