Effect of different seed production methods on carrot seed yield

The present research work was conducted to study the effect of different systems of seed production and methods of sowing on yield and yield components of carrot variety T-29. The experiment was conducted at Vegetable Research Area, University of Agriculture, Faisalabad during the year 2000- 2001. The salient features of the data obtained are summarized below. Different methods of sowing had no effect. It gave similar results either flat or ridge sowing was done. Similarly interaction between systems of seed production and methods of sowing was non-significant. As far as germination/success percentage is concerned, the systems of seed production behaved similarly in this case. In case of mortality percentage, there was no significant effect of different systems of seed production. Data showed clearly that different planting systems had significant effect on days to develop seed stalk showing the superiority of S3 (root to seed) to S2 (topping in situ), and S, (seed to seed). Height of plant at seed stalk development was also affected significantly by different systems of seed production. Seed to seed system gave the maximum plant height while the minimum was observed in root to seed system of seed production, Data pertaining to days to develop primary umbels depicted that various systems of seed production differ significantly, with maximum days in root to seed system while minimum days in seed to seed system of production information collected about height of plant at primary umbel development indicated that various systems of seed production affected plant height significantly producing the highest' plants in seed to seed system- while minimum plant height was observed in root to seed system of production. Analysis of variance for days to develop secondary umbels showed that these are significantly affected by different systems of seed production. Root to seed system took maximum days to develop secondary umbels while seed to seed took minimum days. In case of days to develop tertiary umbels different systems of seed production had significant effect. Root to seed system took maximum days while seed to seed system of seed production took minimum days. Observations on height of plant at maturity depicted that it was significantly, affected by different systems of seed production giving maximum and minimum plant heights incase of seed to seed and root to seed systems of seed production respectively. As far as number of secondary umbels per plant is concerned various systems of seed production duffer significantly. Seed to seed produce the mum number of secondary umbels per plant while root to seed produced the minimum umbels per plant various systems of seed production significantly affected the number of tertiary umbels per plant. Seed to seed produced maximum number of tertiary umbels, while the minimum number was obtained in root to seed system of seed production. Total number of umbels per plant was significantly affected by various systems of seed production with seed to seed system at the top and root to seed system at the bottom. Seed weight of primary umbels per plant was affected significantly by various systems of seed production giving the maximum value in case of seed to seed and minimum value in case of root to seed. The data regarding seed weight of secondary umbels per plant indicated that systems of seed production had significant effect on it. Maximum seed weight of secondary umbels was observed in seed to seed while minimum was found in case of root to seed systems of seed production. Seed weight of tertiary umbels per plant was also affected by various systems of seed production with seed to seed showing superiority over topping in situ and root to seed systems of seed production. Total seed yield was significantly affected by various systems of seed production. Seed to seed system of seed production gave the highest seed yield while root to seed system gave minimum seed yield. According to the data, various systems of seed production had no significantly impact on 1000 seed weight of primary umbels. It is evident from the data that various systems of seed production behaved similarly for 1000 seed weight of secondary urmbels. Data regarding 1000 seed weight of tertiary umbels indicated that systems of seed production were non significant. This was concluded from the results that seed to seed system of production either by flat or ridge sowing was the most effective system for obtaining highest yield. However, further investigations are suggested to be carried out in this regard to collect detailed and comprehensive information.