مرکز منطقه ای اطلاع رساني علوم و فناوري - Sweet Sorghum (Sorghum bicolor L.) Yield Parameters as Affected by Physiological Characteristics

Abstract :

Objectives of this research are to determine physiological characteristics of sorghum (Sorghum bicolor L.) genotypes and to investigate the relationships between these characteristics and yield components. Experiments were carried out in randomized block design with 3 replications over the experimental fields of Kahramanmaras Sutcuimam University Agricultural Faculty during the years 2007-2008. Net photosynthesis rate (Pn), stomatal conductance (gs), chlorophyll content (CC), canopy temperature (CT), plant height (PH), plant diameter (PD) and biomass (B) characteristics were investigated. Results revealed negative relations between vegetative state canopy temperature (VSCT) and sugar content (SC), between vegetative state chlorophyll content (VSCC) and flowering state chlorophyll content (FSCC), between PH and FSCC and between vegetative state net photosynthesis rate (VSPn) and PH-B. Positive relations were observed between B and PH-SC, between FSCC and vegetative state leaf area index (VSLAI)- (VSCC), between vegetative state stomatal conductance (VSgs) and VSLAI-VSPn. The genotype Della was found to be prominent with regard to biomass, sugar and plant height like yield components.