Phenology of Various Rice Genotypes as Affected by Different Transplanting Dates under Cold Climatic Region of Khyber Pakhtunkhwa-Pakistan



To study the effect of different transplanting dates on phenologyof various rice genotypes in cold climatic region, experimentwas conducted at Agriculture Research Institute (N) Mingora Swat, Pakistan, during summer 2013. The experiment was laid out randomized complete block design (RCBD) with split plot arrangement having four replications. Seven genotypes (PK 3445-3-2, DM5627, IR64, IR8225-9-3-2-3, LIBOGO, JAPONICA and FAKHR-E-MALAKAND) and 4 transplanting dates (D1= 25th May, D2= 9th June, D3= 24th June, D4= 9th July,) were used. The optimum 20x20 cm row to row and plant to plant distance was kept. All the genotypes were transplanted in six rows. Each row was consisting of 15 plants. Transplanting on either D2 (9th June)or D3 (24thJune) gave maximum tiller plant-1(19), plant height (88.62cm), number of leaves seedling-1 and other yield and growth contributing parameters. Among the rice genotypes, Fakhr-e-Malakand produced highest tillers plant-1(17), plant height (89.09cm), days to 50% flowering and days to physiological maturity while the other genotypes were at par valued in this order. On the basis of the above results, among the tested genotypes Fakhr-e-Malakand is recommended for transplanting on either June 9thor 24thin agro-ecological conditions of swat valley.

Keywords: Rice (Oryzasativa L.), genotypes, tillers, transplanting dates, physiological maturity

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