تأثير السماد النتروجيني في بعض الصفات النوعية لأربعة تراكيب وراثية من الرز

Abstract

Abstract :- A filed experiment was conducted at Mishkab Rice Research Station at Al-Najaf Governorate during summer of 2009 season, to investigate the effect of nitrogen levels (0,60,120,180)kg N/ha on quality of some characters to four Rice genotypes(Anbbar-33,Yassamen,China5 and T85). The lagout of the experiment is 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. Analysis of variance and their means were compared according to least significant differences( L.S.D.) at 5% probaility level . The following results were obtained : Nitrogen level 180 kg/ha gave the maximum percentage of the head rice(64.40%),protin(6.78%) and total milling percentage (65.88%). compared with the 0 kg(62.17%) Yassamen genotype was superior in trwament giving the maximum percentage total milling (65.60%)due head rice and gave the lower values of chalky seeds percentage compared with China5 gave minimum total milling percentage (61.57%) .