Effect of foliar spray of potassium and zinc on growth and yield of okra

Abstract EN

A field experiment was carried out at the College of Agriculture / University of Baghdad to study the effect of spraying different concentrations of potassium sulphate 44%K as a source of potassium element in four concentrations (0,2000,4000,6000) mg K.l-1 and refer to them K0, K1, K2 and K3 respectively and were considered as main plot and zinc sulphate 22%Zn as a source of zinc element in three concentrations (0, 30, 60) mg Zn.l-1 and refer to them Zn0, Zn1 and Zn2 respectively for the spring season 2017.

Split plot experiment in Randomized complete Block Design (RCBD) with three replicates was adapted where potassium factor represented main plot and zinc factor in sub-plot .The means were compared at least significant difference (L.S.D) at 0.05 probability level.

Results showed that spraying of potassium K2 superior increased plant high to 114.36 cm.plant-1 , leaf area to 271.46 dcm2 , total chlorophyll to 60.54 mg.100g-1 fresh weight, fresh pods number to 59.22 pod.plant-1 , fresh pod weight to 5.59 g.plant-1 , plant yield to 331.84 g.plant1 .

While Zn1 significantly increased plant high to 111.60 cm.plant-1 , leaf area to 267.86 dcm2 , chlorophyll to 52.11 mg.100g-1 fresh weight, fresh pods number to 56.82 pod.plant-1 , fresh pod weight to 5.25 g.pod-1 , and plant yield to 301.39 g.plant-1