Water stress has become the most uncontrolled and unpredictable factor, which is continuously limiting production in crops. Legumes are the major source of protein and are well-recognized for their nutritional benefits as well as their impact on the sustainability of agricultural systems are well known. Leguminous crops are severely affected by water stress causing alterations in various development processes. Proper nutrient management helps in attaining economical legume yields from drought-prone lands. The protective role of potassium in plants suffering from water stress has been documented and it positively influences plant capacity to adjust water stress conditions. This review compromises the information on the water stress-induced harmful effects on legumes growth, nitrogen fixation, gaseous exchange and mineral uptake parameters and proposes appropriate management by potassium application to alleviate the severity of water stres on above mentioned parameters. Application of potassium proved to meet higher yield from legume on cultivation under low/residual soil moisture availability conditions.
Background: Water stress is a global issue to ensure survival of agricultural crops. Mungbean has a great nutritional value, short-duration and has an advantage that it can grow in wide range of soils and environments. For the present study, two varieties of mungbean were selected and raised in earthen pots. Methods: Water stress was imposed at 50% flowering (35-40 days after sowing) and plants were sampled at this stage. The control plants maintained at soil moisture content (SMC) of 12.0 ± 0.5% and in stressed plants, water stress was created by withholding irrigation till SMC decreased to 4.5±0.5%. In legumes, damaging effects of drought can be reduced by potassium supply. Potassium was supplied to the soil at concentration 0.00, 1.54 mM, 2.31 mM, 3.08 mM. Result: This article includes water stress-induced harmful effects on mungbean growth and development, nitrogen fixation and biochemical traits and suggests that different concentrations of potassium fertilizer help to reduce the negative effect of water stress.
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