The Role Of Humic Acid In Reducing The Effect Of Salinity Stress On Pea (Pisum Sativum L.) Yield

Abstract

The experiment has been conducted to evaluate the yield response of pea plants (Pisum sativum L.) to salinity stress at three levels (0, 250, and 500 g.L⁻¹) and foliar application of humic acid at three concentrations (0, 1 mL, and 2 mL). The findings which have been obtained are as follows:

 The results indicate that the increasing salinity levels led to a significant reduction in yield components. However, foliar application of humic acid—particularly at the 2 mL concentration—contributes to considerable improvements in both pod number and pod length compared to untreated plants. The H2S0 treatment records the highest number of pods (34.25) and the longest pods (15.77 cm), while the lowest values have been observed in high salinity treatments without humic acid, such as H0S2 and H1S2. In fact, these findings suggest that humic acid enhances the salinity tolerance of pea plants and may be adopted as an effective strategy for mitigating the adverse effects of salt stress and improving productivity in salt-affected environments.