ORIGINAL ARTICLES Optimizing and describing the influence of planting dates and seeding rates on flax cultivars grown under Middle Egypt region conditions
Journal of Applied Sciences Research
Cultivar selection, time of planting and seeding rate is important factors that influence flax growth and yield variables. The objectives of this study were to evaluate the effects of planting date, seeding rate and their interactions on yield and yield components of two flax cultivars. Cultivars, planting date and seeding rate had significant effects on flax yield and yield components. In general, the interaction between planting date and seeding rate and between planting date and cultivar was
... te and cultivar was non significant. Results indicated that, no interaction occurred between cultivar and each of planting date and seeding rate suggesting that planting date and seeding rate affected the cultivars similarly. The two tested cultivars exhibited significant differences for almost traits. The early planting on November 15 was superior to the other two dates on November 30 and December 15 for seed yield and yield components and straw, fiber yield and related traits. Maximum seed, oil, straw and fiber yields ha-1 was produced when seeding rate was applied at the rate of 180 kg ha-1. Therefore, early planting time November 15 with seeding rate 180 kg ha-1 is recommended to obtain higher yield of flax cultivars Sakha 1 and Sakha 2. Significant linear relationship between planting dates and each of seed and oil yield provides the clue that these traits are dependent upon planting dates. Linear regression for planting date suggested that increase in one unit (15 days delaying) of planting date lead to decreased seed and oil yield by 162.7 kg ha-1 and 63.66 kg ha-1 , respectively. Regression analysis indicated that seed and fiber yields was positively correlated with seeding rates (r = 0.99 and r= 0.99) and increased linearly when the seeding rates increased from 140 to 180 kg ha-1. Finally coefficients of regression results suggest that an increase by one unit (20 kg ha-1) of seeding rate lead to increase seed and fiber yields by 62.55 kg ha-1 and 249.5 kg ha-1 , respectively.