Effect of spraying with different concentration of Boron and Iron on vegetative growth characters of Apricot seedling (Prunus armeniaca L.)

Abstract

An experiment was conducted in lath house at the College of Agriculture , Kerbala University during the growing season of 2011 to study the effect of different concentration of Boron and Iron on shoot system of Apricot seedling . Three replicates were used for each treatment. Boron was used at three levels 0 , 10 , 20 mg/L and three levels of Iron 0 , 10 , 20 mg/L . The seedling were sprayed at two intervals , 15/4 and 30/4/2011 , and they were also sprayed with urea (1g/L) one day before spraying dates. An experiment was conducted according to the Completely Randomized Design (C.R.D.) . and analysis of variance (ANOVA) was based on the least significant difference (P = 0.05) . All measurements were taken at the end of June . Results showed that :-1-The concentration of 20 mg/L of Boron treatment singnificantly surpassed all other concentrations regarding most studied characters . ( height of seedling ,stem diameter , chlorophyll content in leaves , and dry weight of shoot system ) . at this concentration reached 11.67 cm / seedling , 1.89mm , 32.55 SPAD and 1.99g / seedling respectively . while, there was no significant effect of Boron on the fresh weight of shoot system .2-Iron treatment at 20mg/L concentration significantly surpassed all other concentrations regarding all studied growth characters . Height of seedling , stem diameter , chlorophyll content in leaves , fresh and dry weights of shoot system, at this concentration reached 11.78cm/ seedling , 1.68mm , 32.78SPAD , 3.52g/ seedling and 1.82g/ seedling , respectively .3-The interaction between Boron and Iron had no significant effects on the most characters of growth including stem diameter , chlorophyll content , fresh and dry weights of shoot system . However , the only significant effect of this interaction was on Height of seedling where its highest mean was 15.67cm/seedling at the concentration of 20mg/L of Boron and 20mg/L of Iron .