The Effect of Foliar Spraying with Folic Acid and Cysteine on Growth and Yield of Green Bean Plants (Vicia faba L.)

Abstract

An experiment was conducted during winter growing season of 2018 /2019 at Al-Qurnah sub-district/ Basrah Governorate. The aim was to study the effect of foliar spraying of folic acid and Amino acid cysteine at different concentrations on growth and yield of green broad bean plants (Vicia faba L.) cv." Luz de otono".The study included sixteen treatments which were the combinations of four treatments of folic acid (0,10,20,30) mg.l-1 and four treatments of cysteine ( 0,10,20,30) mg.l-1 applied with spraying three times at 10-day intervals after 20 days of sowing. Randomized Complete Block Design (R.C.B.D.) was used in as factorial experiment. Treatment means were compared by using Least Significant Differences (L.S.D.) at probability of 0.05. The results showed that, Spraying with folic acid and cysteine significantly increased all vegetative growth characteristics (plant height, branch number, leaf area per plant and dry weight of shoot system) and increase in the yield and its components (pod length and number as well as green pod weight, weight of 100 seeds and productivity of both green pods and fresh seeds), and a significant effects on seed quality characteristics (total soluble solids, vitamin C, percentage of dry matter, and protein). Folic acid at 10,20,30mg.l-1 increased productivity of green pods as much as 23.53 %, 33.78 %, 79.49 %, compared to control treatment, respectively. cysteine at 10,20,30mg.l-1 increased productivity of green pods as much as 10.56 %, 37.52 % , 59.63 % compared to control treatment, respectively. Spraying with folic acid at 30 mg.l-1 and cysteine at 30 mg.l-1 gave the highest values of green pod and fresh seeds productivity (16.29, 7.10) tone.donum-1 whereas, control treatment gave lower values of green pod and fresh seeds productivity (4.41 ,2.29) tone.donum-1, respectively