Authors : Reza Yadi, Mahboubeh Ebrahimi and Salman Dastan
Abstract: In order to determination of effect of seed rate in different sowing dates on yield and yield components of wheat, an experiment was carried out at Sari region in 2014-2015. This experiment was carried out at split plot in randomized complete blocks design with three replications. Three planting dates November 1, November 20 and December 10 was the main plots and three seed rates 150, 250, 350 and 450 kg haG1 was the sub plots. Results showed that with delay in planting date plant height was decreased but with delay in planting date panicle length, spike length had increased. The most number of spikelet per spike and number of grain per spike had obtained in November 20 that causes to increase yield and harvest index. With seed rate increasing tiller per plant was increased. But, with increasing in seed use plant height, spike length, number of spikelet per spike and number of grain per spike increased that is cause to increase in grain yield. The most grain yield equal to 4020 kg ha–1 was obtained at interaction of November 20 planting date and application of 350 kg seed per hectare. Therefore use of 350 kg seed per hectare in November 20 planting date cause to optimum result.
Reza Yadi, Mahboubeh Ebrahimi and Salman Dastan, 2016. Effect of Seed Rate in Different Sowing Dates on Grain Yield and Yield Components of Wheat in Iran. International Journal of Tropical Medicine, 11: 208-213.