GROWTH ANALYSIS OF SORGHUM SELECTEES UNDER WATER STRESS

Abstract

Two field experiments were carried out at the experimental field of Field Crop Dept. - College of Agriculture -University of Baghdad/AL-Jadriya, during spring and fall seasons of 2017. RCBD design by split plot arrangements with three replicates was used, water quantity,100,75 and 50% from water requirements occupied the main plots and genotypes from Abo- Akefa and Red seed occupied the sub plots. The results shown that selectees from earliness by honey comb method from its origin (Abo- Akefa) that after the first selection cycle, gave higher LAI (2.62), CGR at 50% flowers and maturity(18.71 and 19.54 g.m^-2  day^-1 respectively), NAR(7.18 g.m^-2day^-1), and higher TDM at 50% flowers and maturity(149.48 and 218.78 g, respectively), that reflected on grain growth rate (0.99,0.95 mg day^-1 ),and higher grin yield per plant(86.44 g). It is found significant differences between irrigation treatments, the water quantity, 100% from water requirement gave higher grain yield per plant (73.35g) but75% from water requirements gave only 14% decrease in productivity, this mean reduced of 25% of water requirements, which indicates the possibility of 75% of full irrigation, especially in areas suffering from water scarcity, such as southern Iraq.