تاثير مستويات النتروجين في بعض الصفات النوعية لعدة تراكيب وراثية من الرز Oryza sativa L. في النجف

Abstract

An experiment was conducted at Mishkab Rice Research Station at Al-Najaf Governorate during the summer season of 2009 , to investigate the effect of nitrogen levels (0,60,120,180)kg N/ha on quality of some Rice genotypes(Anbbar-33,Yassamen,China5 and T85). The layout of the experiment was a split-plot in a Randomized Complete Block Design (R.C.B.D) with three replications.Nitrogen levels were the main plots while, genotypes were the sub-plots. Nitrogen level of 180 kg/ha gave the highest values of highest total milling percentage,brown rice,bran rice and grain hardness. while , it decreased the percentage of white rice and broken grains percentage compared with the 0 kg N/ha level. Yassamen genotype gave higher extraction rate(66.4%)when received 180 kg N/ha.