Author(s):

Mandeep Kaur and Balwinder Singh Dhillon

Abstract: The field experiment study entitled “Effect of age of seedling on the performance of rice (Oryza sativa L.) cultivars” was conducted at Research Farm of Guru Kashi University, Talwandi Sabo, Bathinda during Kharif season of 2019. The experiment was laid out in split plot design comprising of 9 treatments combinations replicated thrice. The experiment consisted of three rice cultivar (PR 122, PR 126 and PR 127) in main plots and three age of seedling (30, 40 and 50days old) in sub-plots. Among the cultivars, PR 122 recorded highest value of growth parameters viz. plant height (116.9 cm), number of tillers (43.8), leaf area index (5.06), dry matter accumulation (4845 kg ha^-1). The highest number of effective tillers (41.8), panicle length (25.3 cm), number of grains panicle^-1 (165.5), 1000-grain weight (24.5 g), straw yield (117.8 q ha^-1) produced by cultivar PR 122 that consequently results in 8.3% and 14.2% higher grain yield than other cultivars. Among the age of seedling, transplanting of 30 days old seedling recorded highest growth parameter viz. highest plant height (119.9 cm), number of tillers (48.6), leaf area index (6.25), dry matter accumulation (4867 kg ha^-1) than other age seedling. The transplanting of 30 days old seedling gave highest yield attributes viz. highest number of effective tillers (46.7), panicle length (25.9 cm), number of grains panicles^-1 (202.7), 1000-grain weight (25.4 g), straw yield (175.7 q ha^-1) and harvest index (32.9%) that consequently results in 10.1% and 18.5% higher grain yield than 40 and 50 days old seedling, respectively.

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