Effect of boron and ethrel in some growth traits and yield of some oat varieties

Abstract

This study aimed to evaluate the response of some oat varieties to foliar application of boron and ethrel. A field experiment was conducted western Iraq, during two years (2017-2018 and 2018-2019), using Randomize Complete Block Design (RCBD), within split-split plot arrangement and three replicates, include boron concentrations 50 and 100 mg L-1 with control, and ethrel concentrations 500 and 1000 mg L-1 with control, and four oat varieties are Genzania, Shafa, Carrolup and Hamel. The studied traits are leaves chlorophyll content, flag leaf area, No of tillers m-2, lodging index, No of grain m-2, grain yield, biological yield and grain protein. There was positive effect of boron application for increase Leaves chlorophyll content, grain yield, biological yield and grain protein. Boron concentrations 50 and 100 mg L-1 increased grain yield over the control with 27.8% and 33.8% in first year, with 20.17% and 12.45% in the second year. Ethrel led to decreased flag leaf area, reduced lodging index and increased No of tillers m-2. 500 mg L-1 ethrel increased grain yield over the control with 9.1% in the first year only. There were significant differences among varieties for all traits studied, as Genzania produced the highest grain yield. The effect of interaction between boron and ethrel was significant for No of tillers m-2, grain yield, biological yield and grain protein. the interaction of 100 mg L-1 boron × 1000 mg L-1 ethrel produced the highest No of tillers m-2 and biological yield. 100 mg L-1 boron × 500 mg L-1 ethrel had the highest grain protein.