Regresar

Effects of salinity levels in Oryza sativa in different phenological stages under greenhouse conditions

Abstract:

In this research, the agronomic and yield components of rice were evaluated, subjected to different levels of salinity at different phe-nological stages. It was made on the greenhouse of the Faculty of Agricultural Sciences of the Technical University of Babahoyo, Ecuador. It was established an internally casualized delineation with an 8 X 3 factorial start with four repetitions, corresponding to only phenological phases of growth in three doses of salinity (dS.m-1). According to the results obtained, it is concluded that some agronomic characteristics are affected by high levels of salinity (7.0 dS.m-1), showing significant differences less than 0.05 between the treatments, as in the case of vigor whose level was 7.0 dS. m-1. In the same way, chlorophyll levels are significantly reduced between treatments, being a level of 7.0 dS.m-1 or more severe. It is evident that high levels of salinity are detrimental to yield variations, once at 7.0 dS.m-1, or weight of 1000 grains decreased by 54 %, in quantity or panicle compression by 68 %. Furthermore, it affects other phenophases such as flowering, development and pickling of its vegetative cycle, mainly in the phases of germination, molting, profile and growth of caule.