The Effect of Different Levels of Nitrogen on Yield and Yield Components of two Sweet Corn Varieties in Yasouj Region

Subject Areas : Journal of Plant Ecophysiology

E. Afshar ¹ , M. Afshar ² , E. Afshar ³ , M.J. Fereidooni ⁴

1 - گروه زراعت و اصلاح نباتات، واحد یاسوج، دانشگاه آزاد اسلامی، یاسوج، ایران
2 - گروه زراعت و اصلاح نباتات، واحد یاسوج، دانشگاه آزاد اسلامی، یاسوج، ایران
3 - گروه زراعت و اصلاح نباتات، واحد یاسوج، دانشگاه آزاد اسلامی، یاسوج، ایران
4 - گروه زراعت و اصلاح نباتات، واحد یاسوج، دانشگاه آزاد اسلامی، یاسوج، ایران

Received: 2015-01-15 Accepted : 2015-03-07 Published : 2016-06-01

Keywords: Protein, Thousand Grain Weight, Fertilizer, Fresh forage,

Abstract :

In order to study the influence of different levels of nitrogen and early and medium maturity cultivars on yield and yield components of sweet corn, an experiment was conducted in Yasouj region during summer 2011. The experiment was arranged in split plots based on randomized complete block design with two factors and three replications. Main plot included four levels of nitrogen fertilizer (0, 50, 100, 150 Kg N ha-1) and sub plots included two early and medium maturity cultivars. Results showed that interaction of nitrogen and cultivar was significant on fresh ear yield. Application of 150 kg N ha-1 at medium maturity cultivar produced the highest fresh ear (1892 gr m-2) that was significant difference with other treatment. The treatment of 100 kg N ha-1 had the highest effect on grain yield (521.27 gr m-2) and medium maturity cultivar with of grain yield equals 498.57 gr m-2 was showed a higher yield than early cultivar. The highest thousand grain weight (141.99 gr) was obtained at 150 kg N ha-1 treatment. Also the highest fresh forage yield (2436.8 gr m-2) related to application of 150 kg N ha-1. Generally it seems that application of medium maturity cultivar and 150 kg N ha-1 due to maximum yield.