Effect of foliar application of nitrogen and zinc on the yield and yield components of soybeans

Subject Areas : Journal of Plant Ecophysiology

M. Soroush ¹ , M. Ashori ² , E. Amiri ³

1 - دانش آموخته کارشناسی ارشد، دانشگاه آزاد اسلامی واحد لاهیجان
2 - استادیار دانشگاه آزاد اسلامی واحد لاهیجان
3 - دانشیار دانشگاه آزاد اسلامی واحد لاهیجان

Received: 2015-01-26 Accepted : 2015-01-26 Published : 2015-01-01

Keywords: zinc, Yield, nitrogen, soybean, Foliar,

Abstract :

In order to investigate the effects of zinc and nitrogen foliar application on yield and yield components of soybean, a field study was conducted in Roudsar, Guilan province, during growing season of 2012. The experiment was factorial in randomized complete block design with three replications. Treatments consisted of four levels of nitrogen fertilizer including: N1-control, N2- 30, N3-60 and N4- 90 kg/ha from urea source and zinc treatments in 4 levels including: Zn1- control, Zn2- 0.5, Zn3- 1 and Zn4- 1.5 lit/ha. Results showed that nitrogen levels had significant effects on the number of pod per plant, number of seed per pod, 100 seed weight, grain yield, biomass, height of plant and length of pod. In the experiment zinc treatments, had significant effects on the number of pod per plant, 100 seed weight, grain yield, biomass, harvest index, height of plant and length of pod. Also interaction of nitrogen and zinc treatments had significant effects on the number of pod per plant, number of seed per pod, 100 seed weight, grain yield and harvest index. The 90 kg/ha nitrogen treatment and 0.5 lit/ha zinc application resulted in the most yield (5902 kg/ha) that didn't show any significant difference compared with 60 kg/ha nitrogen and 0.5 L/ha zinc (5682 kg/ha). The application of 60 kg/ha nitrogen and 0.5 lit/ha zinc is recommended in soybean in north of Iran.