|Author:||Gangaiah, B. ; Ramamurthy, V.|
|Book Group Author:||NA|
A field experiment was conducted in Dharwad, Karnataka, India, during the rabi seasons of 1998/99 and 1999/2000 to study the effect of various irrigation schedules, based on irrigation water:cumulative pan evaporation ratio (IW:CPE; 0.0, 0.6, 0.9, and 1.2 with 60 mm IW depth), on the seed yield of oat cultivars JHO-822 (single/double cut) and JHO-851 (multicut). Common irrigations were applied immediately after sowing, at weekly interval up to 21 days after sowing (DAS), and at 21 DAS, coinciding with crown root initiation stage. The number of irrigations were 3, 6, and 7 (1998/99) and 2, 4, and 5 (1999/2000) in JHO-822, and 4, 7, and 9 in JHO-851 during both years. Sowing was conducted on 21 and 14 November in 1998/99 and 1999/2000, respectively. JHO-822 was harvested on 13 March 1999 and 22 March 2000, whereas JHO-851 was harvested on 10 April 1999 and 20 April 2000. Based on pooled data, JHO-822 recorded greater plant height, panicle number, panicle length, panicle weight, test weight, biological yield, seed yield, and irrigation water use efficiency (IWUE) than JHO-851. The higher IWUE of JHO-822 was attributed to shorter growth duration (by 30 days). Seed yield increased significantly up to 0.9 IW:CPE; further increase in IW:CPE did not significantly improve seed yield. IWUE markedly increased up to 0.6 IW:CPE, but decreased at higher IW:CPE. The results indicated that an IW:CPE ratio of 0.9 is ideal for enhanced seed production in both cultivars.
|Pages:||60 - 63|
crop yield, cultivars, irrigation, irrigation scheduling,oats, panicles, plant height, plant water relations, seed production,seed weight, seeds, varietal reactions, water use efficiency, yieldcomponents, India, Karnataka, Avena sativa, Avena, Poaceae, Cyperales,monocotyledons, angiosperms, Spermatophyta, plants, eukaryotes, SouthAsia, Asia, Developing Countries, Commonwealth of Nations, India,cultivated varieties, Mysore, watering, Field Crops (FF005) (New March2000), Plant Breeding and Genetics (FF020), Plant Water Relations(FF062), Plant Production (FF100), Soil Water Management (Irrigation andDrainage) (JJ800) (Revised June 2002) [formerly Soil Water Management]