Performance of Some Rice Genotypes to Various Nitrogen Levels

Abstract

The present investigation was carried out at the Experimental Farm of Sakha Agricultural Research Station, Sakha, Kafr El-Sheikh, Egypt during 2015 and 2016 seasons to study the behavior of some rice genotypes under nitrogen application. Twelve rice genotypes Sakha 105, Sakha 106, Giza 179, G9461-4-2-3-1, GZ 9626-2-1-3-2-3,GZ9807-6-3-2-1,GZ9399-4-1-1-3-2-2, GZ9399-4-1-1-2-1-, GZ10101-5-1-1-1, GZ10147-1-2-1-1,GZ10154-3-1-1-1and PL-GE-101-SP-26 were tested under three different nitrogen levels i.e., 60, 120 and 180 kg N ha-1. The experimental design was split plot with four replications. Yield and yield components were determined in both seasons. The main results on the current attempt could be summed up as follows; The tested rice genotypes had great variation in their yield and yield components in both study seasons. PL-GE-101-SP-26 had the tallest plants, while the shortest plant was Sakha 105 rice variety. GZ 9461-4-2-3-1 gave the longest panicle, number of tillers, and number of panicles, number filled grains panicle-1, grain and straw yields. Giza 179 and GZ9461 were comparable regarding grain yield. GZ10147 had the longest period from sowing to heading. All measured parameters were affected by different nitrogen levels in both seasons, whereas, the highest values of different parameters were recorded with higher nitrogen rate of 180 kg ha-1. The interaction between rice genotypes and nitrogen levels had significant effect on plant height, tillers number, days to heading, panicle numbers hill-1, panicle length, filled grains panicle-1, 1000 –grain weight and grain yield in both seasons. It could be concluded that, all tested rice genotyped significantly responded to nitrogen application up to 180 kg N ha-1