Water deficit on three common bean cultivars

Abstract

This study had the objective of evaluate the effect of different irrigation depth on yield for three different common bean (Phaseolus vulgaris L.) cultivars. The experiment performed in greenhouse using PVC pots with 70 dm 3 . The cultivars analyzed was IAPAR 81, IPR Tangará and IPR Curió and the irrigations occurred when the soil water tension showed 30 kPa considering tensiometers installed at 0.15 m of depth (T1), 0.20 m (T2) and 0.30 m (T3) defining three levels of water in the soil. The plant variable such as dry leaves mass, dry stem mass, dry pods mass, dry roots mass, as well as grain yield and the
yield index were determined and analyzed statistically. IAPAR 81 cultivar presented higher grain yield for T2, and IPR Tangará and IPR Curió were not statistically different for T2 and T3. The dry root mass results were different only between cultivars, with similar grain yield between IAPAR 81 and IPR Tangará, and IPAR Curió presented mean yield reduction of 52% for all three water management. For all cultivars analyzed, IAPAR 81 had less plant development interference due the different soil water management, considering a good genotype for regions with high water deficit risk.