DESENVOLVIMENTO DO FEIJÃO-FAVA (Phaseulus lunatus L.) SOB DÉFICIT HÍDRICO CULTIVADO EM AMBIENTE PROTEGIDO/DEVELOPMENT OF FAVA BEANS (Phaseolus lunatus L.) GROWN UNDER WATER DEFICIT IN GREENHOUSE

This study aimed to evaluate the effects of water deficit on the development of fava bean in greenhouse. The experiment was conducted in pots in a greenhouse covered with low density polyethylene 15 mm thick, in the experimental area of Teresina Agricultural College of the Federal University of Piauí (UFPI), Teresina-PI, Brazil. The experimental design was completely randomized and the treatments consisted of the combination of induced water stress 50% of the evapotranspiration of fava beans, which are: water stress at vegetative stage I; drought stress at vegetative stage II water stress on reproductive phase III water stress during the reproductive phase IV, water stress in vegetative stages I and II water stress in vegetative and reproductive phases II, III and IV; drought stress during the reproductive III and IV, water stress on vegetative and reproductive stages I , II and III water stress on vegetative and reproductive stages I, II, III and IV treatment without water stress. It was evaluated leaf area index, chlorophyll content and abortion of flowers and pods. The drought has affected development, reducing the leaf area index, chlorophyll content, and increasing the abortion of flowers and pods. The fava bean was more sensitive to water stress when it came in more than one phase of development.