Effect of dates of planting, plant geometry and number of seedlings on growth and yield of hybrid rice (Oryza sativa L.)

摘要

A field experiment was conducted at Kanpur during kharif seasons of 2005 and 2006 to find out the effect of hybrid rice 'PHB 71' to three dates of planting (15 July, 30 July and 14 August), four plant geometry (15 x 15 cm, 20 x 15 cm, 25 x 15 cm and 30 x 15 cm) and two seedling rates (one and two seedlings/hill). Hybrid rice planted on 15 July recorded significantly more grain yield (62.82 q/ha), which declined by 7.6 and 20.6% due to 15 and 30 days delay in planting, respectively. Planting the crop with a closer plant geometry of 15 x 15 cm produced significantly highest grain yield (59.18 q/ha) than wider plant geometry of 20 x 15 cm, 25 x 15 cm and 30 x 15 cm. Planting of two seedlings/hill was beneficial with yield advantage of 8.2% over one seedling/hill.