Mazin Mossa Abid Ameen⁽¹⁾ and Jamal Ahmed Abbass^*(1)

(1). Department of Horticulture and Landscape Gardening, Faculty of Agriculture, University of Kufa, Republic of Iraq.

(*Corresponding author: Dr. Jamal Ahmed Abbass. E-Mail: jamal.selman@uokufa.edu.iq).

Received: 11/02/2019                                Accepted: 18/05/2019

Abstract

A field experiment was conducted in private farms, at Najaf province, Republic of Iraq, during 2014/2015 and 2015/2016 seasons, with Randomized Complete Block Design (R.C.B.D) as factorial experiment with three replicates and three factors. Means were compared by using Duncan Multiple Range Test at probability of 0.05. The first factor was seed bacterial inoculation with biofertilizer (Azotobacte chrooccum bacterial) with two levels (inoculation and non-inoculation), seeds were inoculated before sowing, and added second time as activated dose on soil surface with water irrigation after 90 days of sowing. the second factor was humus fertilizers (super humic) in three concentrations i.e. (0, 3 and 6 m.L^-1) with two sprayers, first at 3 – 4 true leaves on plant, and second after 20 days from the first spraying. The third factor was Hydrated magnesium sulfate fertilizer (MgSO₄.7H₂O Mg 10.5%) with three levels i.e. (0, 160 and 320 kg. D^-1), two doses were added, first half dose was added during seed sowing and the second half was added after 60 days from the first dose. Results showed that treatment inoculation with biofertilizer gave a significant increase in the total soluble carbohydrates in leaves, and volute oil quantity characteristics (oil yield and the percentage of volute oil), compared with control treatment which gave the lowest values for the above characteristics. Spraying with humus in a concentration of 3 m.L^-1 significantly increased the total soluble carbohydrates in leaves, oil yield and the percentage of volute oil compared with two concentrations for the two seasons, meanwhile the percentage of volute oil which non significantly difference with control treatment in the second seasons. Meanwhile spraying in concentration of 6 m. L^-1 significantly increased the physical characteristics of volute oil (Specific gravity, density and refractive index) compared with control treatment which gave the lowest values in the second season. Meanwhile there are no significant difference for spraying humus fertilizer on these characteristics in the first season. Also, fertilizer level of 320 kg.h^-1 of magnesium sulfate significantly supervised to control treatment and the level 160 kg.h^-1 gave the highest content of total soluble carbohydrates and all the quantity and physical characteristics of volute oil for two seasons, compared with control treatment which gave the highest values. Also, the interaction between the two and three factors gave significant effects on all studied characteristics. Also, the results showed that inoculation with biofertilizer, spraying with Humus in a concentration of 3 m.L^-1 and fertilization with magnesium sulfate at a level of 320 kg.h^-1 significantly increased the total soluble carbohydrates in leaves, volute oil yield, specific gravity, density and refractive index of volute oil for the two seasons, and the content of total phenol in the seed for the second season only.

Key words: Parsley, Bacterial inoculation, Humus fertilizers, Magnesium sulfate.

Full Paper in Arabic: PDF