Effect of Foliar Feeding with Humic Acid and Adding method of Magnesium on Growth and Yield for Mung Bean (Vigna Radiata L.)

Abstract

A field experiment was conducted during the autumn season of 2020 in Ibn Al-Bitar Vocational Preparatory School in Al-Hussainiya District / Holy Karbala province Aim of determining the best concentration of humic acid and the best method for adding magnesium and their interaction in some of the vegetative growth traits of Mung bean( Vigna radiata L.).The experiment was conducted according to the Completely Random Block Design(CRBD). according to the order of factorial experiments, with three replications, and the number of experimental units 36 experimental units. The spraying was conducted during the stage of vegetative growth and flowering. second factorExperience included Sprinkle humic acid four concentrations( 0,5,10,and15) g liters .Liters were sprayed during the vegetative growth phase and flowering: - Adding of magnesium inthree ways, ground adding according to the recommended amount of 80 kg M ha^-1 (adding one time at the beginning of cultivationMO) and adding half the recommended ground quantity and half the recommended spraying amount (40 kg M ha^-1 and 10 ml.L ^-1 spray during the vegetative growth stageM1  and magnesium is sprayed according to the recommended amount of 20 ml.L^-1. It is divided into two batches (during vegetative growth and flowering) and which is symbolized by M2. Humic acid spray treatment the concentration of (10 g.L^-1 (H2)gave highest averages in leaf area, leaf content of chlorophyll Spad, number of branches, plant height , root length and  the seed yield  .The main one reached (374.3 cm, 45.63 spad, 23.31 branch.plant^-1 ,103.30 cm, 23.82 cm,0.780tons ha^-1) respectively. The method of spraying magnesium the concentration of (20 ml.L^-1) (M2) excelled and gave highest average leaf area (323.5 cm ²) and the presence of a bi-interaction between the humic acid and magnesium addition method, as ground addition and spraying method (M1) with a concentration of 10 g.L^-1was excelled and it gave highest averages in the number of branches, plant height and main root length as it reached (24.87 plant.branch^-1 ,106.30 cm, 24.93 cm) respectively. The ground addition of M0 excelled on the leaf chlorophyll content of Spad and gave the highest average of (45.63) Spad and the presence of significant interaction. As the ground application method with spraying (M1) with a concentration of (10) g.L ^-1 (H2) excelled on the leaf chlorophyll content of Spad and gave the highest average (51.00) Spad. We conclude through the study that the best concentration of humic acid spray is 10 g .L^-1H2, with the addition of half the amount of spray and the ground addition of magnesiumM1, for its excelled in most of the vegetative growth traits of Mung bean