Effect of Seeding Depth and Abscisic Acid on Barley Hordeum vulgare L. Germination, Growth and Seed Yield

Abstract

The field experiment was conducted at field crops research station, college of agriculture/ Tikrit University. The factors of study were seeding depth and abscisic acid. The first factor was seeding depth at 3, 6, and 9 cm. The second was abscisic acid concentrations of 0, 150, 250 and 300 mg L-1. A randomized complete block design (RCBD) with three replications was used. The results showed that a seeding depth of 3 cm recorded the highest means of germination, number of days to seed filling, plant height, number of spikes per m2, number of seeds per spike, spike length, 1000 seed weight and seed yield. The means were 91%, 6.31, 85.87 cm, 385.2, 27.38, 13.25 cm, 52.99g and 5.59 ton ha-1. However, the longest coleoptile of 9.21 cm was observed at 9 cm seeding depth. In addition, 300 mg L-1 gave the highest number of days to seed filling, spike length, 1000 seed weight and yield, and means were 41.98 day, 13.96 cm, 50.95 g and 4.20 ton ha-1. Our data revealed that the Interaction between 3 cm and 300 mg L-1 showed the highest means of the number of days to seed filling, spike length, 1000 seed weight and seed yield, and means were 44.58 day, 16.31 cm, 54.17 g and 5.74 t ha-1.