Investigation of Planting Method and Plant Density on Some of Morphological Treats, yield and yield componenet of Sweet Corn (Zea mays L.Var Saccharata) Varieties

In this study two methods of planting (one raised bed and furrow planting) and plant density (65000، 75000 and 85000 plant/ha) was evaluated on some of morphological treats، harvest index and conservable grain yield of sweet corn (Chase and KSC403su) varieties Torbat-e-Heidariyeh. The experimental design was factorial based on RCBC with 4 replications. The result of ANOVA showed significant differences between days to emergence، Anthesis، silking and Anthesis silking interval (ASI)، tassel length، ear height، Leaf area index، no of grain/row and no of row، ear length، harvest index، 300 Kernel weight and also conservable grain yield of sweet corn varieties that effected by planting methods. The result has not significant Effects on Anthesis، Plant Height and number of total leaf. The result of interaction between Varites and Plant density and planting method showed that significant different on Anthesis Silking interval. The highest Antehsis silking interval was belonged to furrow planting and 85000 plant/ha. Also the highest conservable grain yield was belonged to Chase variety at 75000 plant/ha and furrow planting method with 11. 9 ton/ha، while the lowest grain yield was belonged to KSC403su variety at 85000 plant/ha and raised bed planting (3. 6 ton/ha). The Chase was the better in compared to KSC403su varieties because its canopy and photoperiod is shorter than KSC403su.