Response of Growth Components and Yield of Four Mung Bean Varieties to Drought Stress

Abstract The research aims to determine the response of the evaluated mung bean varieties to various levels of drought and identify at least one variety that is most tolerant to higher levels of drought stress. The study was conducted using Completely Randomized Design (CRD) with three replications. The first factor was the level of drought stress: 100%, 90%, 80%, 70%, and 60% of Crop Water Requirement (CWR). The second factor included four mung bean varieties: Local Belu, Local Flores, Vima-3, and Kutilang. The observed data encompassed vegetative, reproductive, and physiological characteristics. The observed data underwent analysis using analysis of variance, and Honestly Significant Difference (HSD) post hoc test and a simple correlations analysis at a significance level of 5%. The research results revealed no interaction effect for all observed variables. Drought stress at 60% and 70% CWR significantly reduced plant height and the number of leaves compared to 100% CWR. The number of pods significantly decreased at lower than 80% CWR compared to 100% CWR, while the seed weight per plant decreases from the 90% CWR. Except for the number of leaves at 4 and 6 weeks after planting (WAP), and plant branches, there was significant effect of varietal differences.