The effect of foliar spraying with the amino acid arginine on some vegetative and yield for cowpea plant Vigna unguiculatal L. exposed to salt stress

Abstract

The experiment was conducted using pots according to the completely random design method (RCBD) during the agricultural season 2022-2023 to study the effect of spraying with arginine and at concentrations (0.50.100) ml.gm.Liter-1and irrigating with saltine NaCl and in concentrations (0.5.10.15) ds.m-1 On some vegetative  and yield of cowpea plants. The results showed a significant decrease in the mean of plant height, number of leaves and leaf area and economy yield and biological yield with Harvest index   .when irrigating plants with a solution NaCl, especially the concentration of 15 ds.m-1, when spraying plants with arginine, there was a significant increase in plant height, number of leaves and leaf area and economy yield and biological yield with Harvest index  in concertation (100mg .L-1)  ,while salinity or arginine had no significant effect on stem diameter, and the interaction between the two experimental factors had a significant effect on most of the studied traits.