Effects Of Planting Dates And Densities On Yield And Yield Components Of Sweet Corn Of ksc404 In Mazandaran Climate Condition(Sari)
2007
Tamaddon Rastegar, M., M.Sc of Agronomy, University of Mazandaran | Amini, I., Associated Professor,University of Mazandaran
In order to study the effects of planting time and density on yield and yield componets of sweet corn cultivar ksc404,an experiment was conducted in 1999 at Dasht Nase Sari.In this study the experiment design of split-plot in the form of randomizied complete blocks with four replications was used.The main plots were allocated to 4 dates of sowing(25 Th of April ,15 Th and 25 Th of May,9 Th of June) ,The sub plots were consisted of 3 plant densities(55,65,75 theousand plant/ha),The result showed,that planting dates and different densities had statistically significant effect at 5% level on the number of total kernel per corn, number of kernel per row,corn hieght,thousand kernel weight,seed weight per ear,corn-stem weight and stem diameter but had no significant effect on the number of corn row,plant height,internode lenght and corn wood diameter. Effects of different planting time on yield were significant and the best planting time with yield of 12.2 ton/ha was 25 th of April.Planting time 15 th and 25 th of May,9 th of June with respect of best planting had %10.2,%37.1,%38 yield reduction respectively.The effect of different densities on yield were not statistically significant and best yield with 11.2 ton/ha was obtained from 65 thousand plant/ha density.Treatments with(55,75 thousand plant/ha) with respect of best density have %26.9,%16.4 yield reduction.results of this experiment indicated that date of 25 th of April and density of 65 thousand plant/ha have greatest yield.
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