|Vimlesh Ph.D Thesis.pdf||692.63 KB|
A field experiment was conducted during Kharif seasons of 2005 and 2006 to study the effect of dates of planting, plant geometry and number of seedlings per hill in hybrid rice 'PHB 71' at Student's Instructional Farm, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur. Twenty four treatment combinations of three dates of planting (15th July, 30th July and 14th August), four plant geometry (15 × 15, 20 × 15, 25 × 15 and 30 × 15 cm) and two seedlings rate (1 and 2 seedlings per hill) were tested in three replicated split plot design assigning dates of planting and plant geometry in main plots and number of seedlings in sub plots.
Planting the crop on 15th July recorded significantly more total (317.59) and productive (246.86) tillers per m2, plant height (105.77 cm), dry weight per hill (34.36g),number of functioning leaves per hill (63.54),filled grains per panicle (202.33) and 1000-grain weight (22.07g) than 30th July and 14th August planting. The hybrid rice planted on 15 July registered significantly more grain yield (62.82 q/ha), gross income (Rs 47041.00 /ha) and net profit (Rs 18401.00 /ha) which declined by 4.83 and 12.96 quintal per hectare, Rs 3530.00 and Rs 9681.00 and Rs 3538.00 and Rs 9677.00 per hectare due to fortnight and one - month delay in planting. Closer plant geometry of 15 × 15 cm recorded significantly more total (341.50) and productive (228.87) tillers per m2 and LAI (3.77) than wider plant geometry. Contrary to these, plant height (97.03 cm) and number of functioning leaves per hill (83.21) were significantly higher under 20 × 15 cm plant geometry. However, protein content in grain was significantly higher under wider plant geometry of 30 × 15 cm. Hybrid rice planted at closer plant geometry of 15 × 15 cm also gave significantly higher grain yield (59.18 q/ha) and gross income (Rs 44 327.00 /ha) but wider plant geometry of 25 × 15 cm gave significantly higher net profit (Rs 9802.00 /ha) and return per rupee (1.36) than closer plant geometry of 15 × 15 and 20 × 15 cm. Planting of 2 seedlings per hill recorded significantly more total (298.83) and productive (226.54) tillers per m2, dry weight per hill (32.55g), number of functioning leaves per hill (88.00), LAI (3.55) and 1000-grain weight (21.91 g) and numerically more filled grains per panicle (187.96) than planting of 1 seedlings per hill. Grain yield (58.25 q/ha) and gross income (Rs 43631.00 /ha) were significantly more under 2 seedlings per hill while net profit (Rs 14854.00) was significantly more under 1 seedling planting.