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Title

EFFECT OF PLANTING DATE ON SEED YIELD AND YIELD COMPONENTS OF CORN DIFFERENT HYBRIDS

Writers

ANVARI K. | AREFI S. | FATEH M.

Pages

 Start Page 368 | End Page 377

Abstract

 In order to study Effect of planting date on seed yield and yield components of different CORN HYBRIDS, a field experiment was conducted in a split- plot arrangement using randomized complete block design with four replications in Miyandoab Agricultural Research Station in 2005-2006. The planting date (main factor) consisted of levels (15 and 3o May and 14 June) and the sub- factor consisted of 15 CORN HYBRIDS (KSC704, KSC700-late maturing, KSC647, KSC604, KSC500- mid maturing, KSC400, OSSK444, BC404, KSC302, KSC340, OSSK373, BC354- midearly maturing, BC282, KSC260, BC250- early maturing). The results showed that the effect of planting date on ear length, seed number per row, seed depth in ear and seed yield were significant. The highest seed yield (11.54 ton/ha) belonged to second planting date (30 May) and the least (7.8 ton/ha) was obtained from the third planting date (15 June). The results also showed that the effect of CORN HYBRIDS was significant on all traits. The highest seed yield (12.05 and 11.6 ton/ha) belonged to KSC604 (mid maturing) and KSC704 hybrid (late maturing), respectively. Interaction between varieties planting date was significant on the number of seed Rows per Ear (p<0.05) and on seed deep in ear and seed yield (p<0.01). The highest seed yield (15.12 ton/ha) and was obtained from the third planting date (15 June) KSC704 hybrid (late maturing). According to this study the planting dates of 15 and 30 ordibehesht for the late and mid maturing cultivars are recommended for the experiment region and other similar regions.

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