Water use, water use efficiency and yield of bed planted wheat (Triticum aestivum L.) in relation to various seed rate, spacing and irrigation levels.

摘要

Field experiments were conducted in Ludhiana, Punjab, India during the rabi seasons of 1997-98 and 1998-99 to evaluate the water use, water use efficiency and crop yield of bed-planted wheat cv. PBW 343 under various seed rates and spacing (100 kg/ha at 3 rows/bed; 66.7 kg/ha at 2 rows/bed; and 44.5 kg/ha at 2 rows/bed) and irrigation levels (0.65 and 0.95 IW:CPE ratio). Total water use was higher under 0.95 than 0.65 IW:CPE ratio. Seed rates of 44.5 and 66.7 kg/ha, with 2 and 2 or 3 rows/bed, respectively, produced grain yield significantly at par with each other. Water use efficiency was high under 0.65 IW:CPE ratio. The maximum water use per day was recorded during 101-130 days after sowing. The soil water amount was higher under 0.95 than 0.65 IW:CPE ratio..