Factors such as unprepared seed bed and agronomical elements or local common rotation are usually the cause of conola late planting. This experiment was counducted as randomized complete ...
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Factors such as unprepared seed bed and agronomical elements or local common rotation are usually the cause of conola late planting. This experiment was counducted as randomized complete block desing with four replications in two years 2005-2006 and 2006-2007 . Seven planting dates, begining from Nov 6th to late Dec 18th with one week interval, were determined in Ahvaz Agricultural Research to assess canola hybrid Hyola308 crop loss and analyze yield impact factors in late planting. Results showed that the delay in canola planting caused a significant effect on the increase of the interval between planting and emergence, reduction seed emergence percent, flowering and maturity duration. Reduction in reproductive length led to a significant loss in pod per plant, seed per pod, and thousands seed weight. Each day delay to a reduction of seed and oil by 2.6 percent. Traits and yield component correlations, direct and indirect effect path analysis showed that flowering initiation had the most direct and indirect effects via other factors on seed and oil yield, so the sowing date must be regulated in such a way that flowering initiation happens with optimum condition (Feb 3th), and with 14-17C environemtal temperature.
Volume 32, Issue 1 , September 2009, , Pages 53-63
Abstract
Delaying sowing cultivation of canola was cased by Khouzestan rotation condition. In order to reduce comprehensive cultivation delay injury, this study was carried out in Shavoor Agricultural ...
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Delaying sowing cultivation of canola was cased by Khouzestan rotation condition. In order to reduce comprehensive cultivation delay injury, this study was carried out in Shavoor Agricultural Research Station during 2004-2006 in randomized complete block design (RCBD) in split plot method with 4 planting dates 11th Nov, 21th Nov, 1th Dec, and 11th Dec in main plots and five nitrogen levels, 0, 50, 100, 150 and 200 kg/ha in sub plots with 3 replications. The results of the component analysis showed delay in planting from 11th Nov to 11th Dec reduced 24.6 pods per plant, 3.1 seed per pod, 0.43gr thousands seed weight, 1084.8 kg/ha seed yield, 5.6 seed oil percent and 539.1 kg/ha oil yield. There was significant difference between nitrogen levels application increasing form 0 to 200 kg N/ha to increase 55.3 pods per plant, 2.1 seed per pods, 0.6 gr thousands seed weight, 1965.7 kg/ha seed yield, 3.5 seed oil percent and 789.0 kg/ha oil yeild. Interaction effects showed that yield and yield component increased significantly by increasing of nitrogen levels for each planting date. Because there was no significant difference between 150 and 200 kg N/ha, 150 and 200 kg N/ha for normal and late planting date were recommended respectively.
