Effect of Transplanting Dates on Yield and Yield Components of Various Rice Genotypes in Hilly Area Cold Climatic Region of Khyber Pakhtunlhwa-Pakistan

Abstract

To study the effect of different transplanting dates on yield and yield components of rice genotypes in cold climatic region of hilly areas, two years consecutive experiments were conducted at Agriculture Research Institute (N) Mingora Swat, Pakistan, during summer 2012 and 2013. The experiments were laid out on randomized complete block design (RCBD) with four replications. Seven genotypes(PARC 403, OM5627,IR64,IR8225-9-3-2-3, CIBOGO,GA-5015,and FakhreMalakand) and 5 transplanting dates (D1= 25^th May, D2= 9^th June, D3= 24^th June, D4= 9^th July, and D5= 25^th July) were used. The optimum 20 x 20 cm row to row and plant to plant distance was kept. On the basis of the result transplanting on either D2 (9^th June) or D3(24^thJune) gave maximum tiller plant^-1, panicle length, paddies panicle^-1, 1000 paddy weight  and paddy yield in both yeas respectively. Transplanting on D5 decreased panicle length, paddies panicle^-1and paddy yield. While D1 and D4 were at par valued in respect of tiller plant^-1, Panicle length, 1000 paddy weight, and paddy yield respectively. Among the rice genotypes, FakhreMalakand produced highest tillers plant^-1(22.2 and 25.20), panicle length (21.8and 22.08 cm), paddies panicle^-1(197.7 and 212.1), 1000 paddy weight (19.2 and 20.11g) and paddy yield (6.49 and 5.55 t ha^-1) in both years while the genotype IR8225-9-3-2-3 was statistically at parin with Genotype Fakhremalakand in respect of paddy yield in year 2013. Other genotypes were statistically at par value in this order. On the basis of the above results, among the tested genotypes FakhreMalakand is recommended for transplanting on either June 9^thor 24^thin the agro-ecological conditions of hilly areas cold climatic regions of Khyber Pakhtunkhwa swat Pakistan.

Keywords:Rice (Oryza sativa L.), genotypes, transplanting dates,panicle,paddy, paddy yield, yield