Response of Mungbean Cultivars to Irrigation gradient : Plant Growth

Abstract

Plant growth in rice-based cropping system is often limited by variation in the amount and duration of rainfall. Four mungbean were subjected to different moisture gradient in the dry season of 1990 and 1991 at Chiang Mai Field Crops Research Center. The results showed that water deficit reduced crop growth tate (CGR), stem growth rate (SGR), leaf growth rate (LGR), grain growth rate (CCR), leaf area weight (SLW) increased with increasing levels of drought stress. Drought resistance was associated with duration of crop. Kamphaeng Saen 2 and U-thong 1 (medium duration cultivars) has higher crop growth rate and less leaf senescence than Chai Nat 60 (short duration cultivar) and Local (long duration cultivar).