Productivity of common bean grown under periodical water stress conditions

Gergana Ilcheva

Abstract: The aim of the study is to establish the sensitivity of beans to water deficit during the different periods of vegetation carried by repealing of irrigations. The experiment was conducted in the period 2014 - 2016, at experimental field of Agricultural University - Plovdiv, on alluvial soil. The variety Dobrudjanski 7 was used. The variants of experience are the following: 1) without irrigation; 2) optimal irrigated at 80% of FC (field capacity) pre-irrigation soil moisture for the 0-40 cm layer; 3) without irrigation in vegetative period; 4) without irrigation during budding and flowering; 5) without irrigation during pod formation and grain pouring. For the conditions of the experiment, to phase "budding" bean plants satisfied their needs for water in a natural way, so there are no data of the sensitivity of plants. Water deficit during “budding - flowering” reduces the yield by 10-17% (average 13%) and during “pod formation - pouring of grain” - by 22-28% (average 26%). Irrigation only during “pod formation - pouring of grain” period increases yield by 41-76% (average 56%), and during „budding - flowering” period – by 22-52% (average 32%).

Keywords: beans; irrigation; productivity; water stress

Date published: 2017-05-16