The influence of irrigation disruption at the end of planting season on growth length and yields of barley ,s genotypes

ABSTARCT: In order to evaluate the effect of irrigation disruption at the end of planting season on growth length and yields of Barley, s genotypes, under drought stress condition, an experiment was conducted at Kabotarabad Agriculture Research Station in 2008. These two experiments were done separately, by completely block design with 3 replications, 10 genotypes were studied at drought stress condition (Irrigation disruption after emergence of spikes) and normal water irrigation. Plant height, the number of fertile tiller, the number of infertile tiller and spike length was significantly affected by treatment in normal condition. Treatment also had significant influence on the number of days from germination until spike formation, the number of days from germination until physiological ripening, plant height, the number of fertile tiller, the number of infertile tiller and spike length in stress condition. In normal condition, the highest number of days from germination until physiological ripening, the number of fertile tiller and the number of infertile tiller was related to genotype number 10, however, the maximum the number of days from germination until spike formation and plant height was achieved in genotype number 4 and 8, respectively. Genotype number 9 and 2 also had obtained the maximum number of infertile tiller and peduncle length. On the other hand, in stress condition, genotype number 6 had obtained the highest number of days from germination until spike formation, the number of days from germination until physiological ripening and plant height. The maximum number of fertile tiller and peduncle length also obtained in cultivation of genotype number2. Moreover, the highest number of infertile tiller and spike length was related to genotype number 4 and 9, respectively.