EFFECT OF SOWING BY DIFFERENT SEEDING RATES ON QUALITATIV TTIATS OF FOUR WHEAT (Triticum aestivum L.) CULTIVAR SEEDS

Abstract

This experiment was carried out at laboratories of Agriculture and Marshes College , University of Thi-Qar and at laboratories of agriculture  college , university of  Basra  during 2013 - 2014 . The aim of this study was to    identify the effect of the different seeding rates (80,100,120 and 140 kg.ha^-1)  on viability and quality characters of  four wheat cultivars ( Abu-Ghraib, IPA – 99 , Al-fatih and Al-Iraq ) seeds . Factorial experiments in CRD was used with four replication in two factors . The results showed that there were significant differences between two factors of study and their interaction. The seeds produced  from seeding rate 80 kg.ha^-1 gave the higher averages of field emergence , standard germination , radical length , seedling dry weight and protein percentage ( 81.18 % , 91.03 % , 7.92 cm , 5.23 gm and 13.71 % ), respectively . The seeds produced from  seeding rate 100 kg.ha^-1  gave the higher averages  of  first count test and  plumule length ( 74.35 % and  6.45 cm ), respectively . The seeds produced from  seeding rate 120 kg.ha^-1  gave the higher averages  of  carbohydrate percentage (61.27) . Al-Iraq seeds gave the higher averages of  field emergence , first count test  , standard germination , radical length , plumule length , seedling dry weight and  carbohydrate percentage ( 86.23% , 72.68 % , 93.22% , 8.51 cm , 6.88 cm , 5.83 gm and 61.65% ) , respectively. Abu-Ghraib seeds gave the higher averages of  protein percentage (13.94 ). Al-Iraq seeds  produced from  seeding  rate 80 kg.ha^-1 gave the higher averages of  field emergence ,  radical length and seedling dry weight ( 89.14% , 8.87 cm and 6.65 gm ), respectively . Al-Iraq seeds that  product from  seed rate 100 kg.ha^-1 gave the higher averages of first count test  , standard germination and plumule length ( 79.00% , 95.98% and 7.83 cm ), respectively . Al-Iraq seeds that  product from  seed rate 120 kg.ha^-1 gave the higher averages of carbohydrate percentage ( 61.92% ). Abu-Ghraib seeds  that  product  from  seed rate 100 kg.ha^-1 gave the higher average of protein percentage(14.25).