Investigation on the effects of seedling transplanting date on the seed yield and the qualitative and quantitative characters on seed in Ahwazi lettuce.
2008
Tavusi, Mehr Zad | Mosharraf Qah Farrokhi, Gholam A`bbas
This study was focused on the qualitative and quantitave characters in different seedling transplanting dates in Ahwazi lettuce (local population in Khuzestan). This experiment were studied in two phases on farm and at laboratory. Seed yields, were produced of 5 different seedling transplanting dates, were compared in randomize complete block design with 4 replications on farm. Then, the seed qualitative characters were evaluated at laboratory over a number of months. This stage was conducted as split plot in completely randomized design (CRD) with 3 replications. Germination percentage, N1 (to count germination 4 days after culturing), uniformity, rate of germination, and means time of germination, Seedling,s wet amd dry weight were measured and calculated in each treatment on different frequency times after seed harvesting. Results showed that all studied characters severely affected by transplanting dates and during seed storage. 7th Sep. wasn't suitable for transplanting, at all because of heat stress in nurseries at the first season growth. The Seed yield and the other seed qualitative characters were in higher level on D2,D3 (22th Sept. and 6th Nov). Also, 4 months seed storage period was caused better seed vigority. Generally, interaction effect D3 (6th Nov). and T5(4 months seed storage period)was better than the other experimental treatments. Seed dormancy were reduced after 2 months seed storage period. Keywords: Ahwazi lettuce, seedling transplanting date,Seed yield, seed storage Period, seed qualitative characters.
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