Role of foliar application of Humic acid on Mung bean (Vigna radiata L.) cultivars under Salinity stress

Abstract

Abstract Higher salinity affects 20% of farmed land and 33% of irrigated land area globally. These affect causes food crises worldwide. Humic acid provide protection against stress and promote the plant growth and productivity. Therefore, this study focuses on dose response relationship between exogenous applied humic acid and salt stress on Mung (Vigna radiata L.) cultivars. Resultants the application of humic acid under salt stress improved the plant growth and yield of selected cultivars. The higher salinity (100 ppm) caused higher effect on both selected cultivars than 50ppm salt as compared to control plants. While applied protectants 40%HA with 50 ppm salt is more effective than 40% HA with 100ppm salt in both selected cultivars. Based on biomass and yield reduction Pusa Baisakhi is least sensitive to salt than ML-131. Study also concise that salt stress depends on growth stages of plant and higher biomass reduced at 20 DAS in cultivar Pusa Baisakhi (-11.15%) and at 40 DAS in cultivar ML-131 (-25.62%). The higher production of yield due to application of humic acid was seen (65.95%) in cultivar ML-131 than cultivar Pusa Baisakhi (8.54%). Therefore the study promoted that under salt stress conditions humic acid uses as a protectant and cultivar Pusa Baisakhi as a tolerance species will be useful tool for sustainable agriculture.