مرکز منطقه ای اطلاع رساني علوم و فناوري - Effects of Physiological Characteristics on Yield of Silage Sorghum

Abstract :

The present study was conducted to determine the physiological characteristics of silage sorghum and their effects on yields. Experiments were conducted in randomized block design with 3 replications during the growing seasons of 2007-2008. Net photosynthesis rate (Pn), stomal conductance (gs), chlorophyll content (KI), leaf area index (YAI), canopy temperature (BÖS), plant height, plant diameter, green herbage yield parameters were investigated. Results revealed significant positive relationships between vegetative period leaf area index and vegetative period net photosynthesis rate – stomal conductance; between flowering period leaf area index and flowering period chlorophyll content – plant height; between vegetative period chlorophyll content and vegetative – flowering periods stomal conductance; between green herbage yield and flowering period chlorophyll content – plant diameter; between vegetative period net photosynthesis rate and stomal flowering period net photosynthesis rate – stomal conductance; vegetative period stomal conductance and flowering period net photosynthesis rate – stomal conductance. Among the experimented genotypes, the genotypes B 24, ICSB 472 and ICSB 502 with their prominent green herbage yields might be recommended for the region.