The Influence of Sowing Density, Nitrogen Fertilizer level and spliting on Yield and Yield Components of Wheat

Subject Areas : New Finding in Agriculture

Mojtaba  Jafarzadeh Kenarsari ¹ (دانشگاه آزاد اسلامی، واحد بروجرد، گروه زراعت و اصلاح نباتات، بروجرد، ایران)
Ali  Sabeti ² (دکتری زراعت دانشگاه آزاد اسلامی، واحد علوم تحقیقات تهران، گروه زراعت، تهران، ایران)

Received: 2015-11-08 Accepted : 2015-11-08 Published : 2014-02-20

Keywords: Wheat, sowing density, nitrogen amount and spliting,

Abstract :

      In order to evaluate the different levels of sowing density, nitrogen fertilizer level and spliting, an experiment was done as split-split plot in form of randomized complete block design with 4 replications in 2010-2011. The factors were sowing density in four levels (100, 250, 400 and 550 seeds per m2) as the main factor, nitrogen fertilizer splitting in three levels (no spliting and spliting in 2 steps (tillering and heading) and 3 steps(sowing , tillering and heading)) as the sub-factor, and the amount of nitrogen fertilizer in three levels (150, 250 and 350 kg/ha Urea) as the sub-sub-factor. The results showed that with the increasing of density, the number of hills per m2, the number of spikes per m2 and the grain yield are increased significantly. Moreover, along with the decreasing of sowing density, the number of spikes per hill, the number of spikelets per spike, the number of grains per spikelet, the number of grains per spike, the thousand grains weight and the yield of each hill are decreased significantly. By applying the fertilizer in 2 splits, the number of spikes per hill and per m2 are increased significantly. With the increasing of nitrogenized fertilizer use, the number of spikes per hill, the number of spikes per m2 and the number of grains per spike are increased significantly.  

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