Effect of bio-fertilizer and salicylic acid on dry weight and leaf content of some nutrient elements of fenugreek plant under saline stress

Abstract

A two factorial experiment of randomized complete block design with three replications was conducted at the experimental farm of the College of Agriculture - Anbar University, during the winter of 2020 using a plastic container. To study the effect of bio-fertilizer and spraying with salicylic acid in dry weight and the concentration of some elements in the fenugreek plant cultivated under saline stress. The first factor was bio-fertilizer and salicylic acid spraying on the shot as the following: without each of bio-fertilizer and spraying the Salicylic acid as control treatment, pollinated with bio-fertilizer, spraying with salicylic acid, pollinated with bio-fertilizer plus spraying with salicylic acid. While the second factor was the saline irrigation water with three saline levels i.e., 0.8, 5.0, and 9.5 ds m-1. Increasing the salinity of irrigation water to 9.5 ds m-1 significantly decreased the rates of the studied characteristics except the nitrogen concentration in the leaves. Treatments for Pollination with bio-fertilizer and spray with salicylic acid differed significantly between them, where the interaction between biological pollination and spray with salicylic acid superior to other traits except for proline, Pollination and spraying with salicylic acid improved the functional condition of the fenugreek plant causing a significant decrease in the concentration of proline in the vegetative group reached to 1.33 mm g-1 Significant decrease exceeding 11% compared to the control treatment That recorded 1.51. The interaction between irrigation water with a salinity of 0.8 ds m-1 and mixing of biological pollination and spraying with salicylic acid gave the highest values of dry weight and the concentration of elements in the vegetative part reached to 15.11g ,2.32,0.47and 4.16 mg/g for each of dry weight and N.P.K respectively.