The Effect of Combined Application of Herbicides and Nitrogen-Fixing Bio-Fertilizer to Control Weeds in Corn (Zea Mays L) K.SC406

Subject Areas :

Shahla Ravangard ¹ , Mohammad Nasri ² , Farshad Sadeghi ³

1 - Department of Agronomy, Facaulty of Agriculture University of Islamic Azad Shiraz and Office Agriculture Jahad Gachsaran, Yasouj- Iran.
2 - Department of Agronomy, College of Agriculture. Varamin Branch, iran
3 - Department of Agronomy, Facaulty of Agriculture University of Islamic Azad Shiraz, Shiraz- Iran

Received: 2014-09-12 Accepted : 2016-01-02 Published : 2015-11-22

Keywords: corn, herbicide, bio-fertilizers, quality and quantity characteristics,

Abstract :

The following study was achieved to investigating the effects of bio-fertilizers N-fixer bacteria  and Methods of controls weeds on quality and quantity characteristics Corn(Zea MaysL. Var K.S.C.406). An experiment was conducted in a Split-plot design as base of randomized complete block design with 3 replications. Treatments main plat included bio-fertilizers on three levels (Azotobacter, Azospirillum and Control). And Sub plat Methods of controls weeds on Five levels (with out weeding, complete weeding, 2 lit.ha herbicides Nicosulfuron, 1.5 lit.ha herbicides Nicosulfuron, 1 lit.ha herbicides Nicosulfuron). In this study, the maximum Number of spikes per Plant (2.38N.o), grain yield (11313.1 a kg.ha-1) ,biological yield (28673.4 Kg ha-1) and Harvest Index(39.5 %) obtained from Azotobacter with complete weeding treatment had no significant difference with Azotobacter with 2 lit.ha herbicides Nicosulfuron, Azospirillum with 2 lit.ha herbicides Nicosulfuron, Azospirillum with complete weeding treatments. The highest1000 grain weight (300.9 gr), plant height (207 Cm), Stem diameter( 4.32 Cm), Ear length( 36.1 Cm) were assigned of Azospirillum with 2 lit.ha herbicides Nicosulfuron treatment had no significant difference with Azotobacter with 2 lit.ha herbicides Nicosulfuron, Azotobacter with complete weeding, Azospirillum with complete weeding treatments. On the other hand the minimum this characteristic allocated to control with with out weeding. The maximum number of weeds per square meter (14.5 N.o), Fresh weight of weeds per square meter (2.146 Kg.m2) and dry matter of weeds per square meter (0.558 kg.m2) were achieved from Azospirillum with with out weeding. And minimum this characteristics   allocated to included bio-fertilizers with 2 lit.ha herbicides Nicosulfuron. This idea necessary to more research.