EFFECT OF DIFFERENT WATER QUALITY ON FLAG LEAF AREA ,CHLOROPHYL CONTENT AND YIELD OF SOME BREAD WHEAT CULTIVARS

Abstract

A field experiment was carried out at the experimental farm of the Dept.of Field Crop Sci., college of Agriculture Univ.of Baghdad.during 2008- 2009and 2009-2010 winter seasons . Soil texture was Typic Torrifluvient .The aim of the experiment was to investigate the effect of different water types on flag leaf area , its content of chlorophyl and yield of five bread wheat varieties(Iraq,IPA99,IPA95,Fatah and Tahaddi).Asplit plot design had been followed with three replications,the main plots represented by the varieties while the three water types (river water ,well water and alternating irrigation), occupied the sub plots .Plants were harvested on 12/5 and 30/4 for the two seasons, respectively. The cultivar IPA99 gave larger flag leaf area , grains /spikeand grain weight(45.36cm2,52.37 grain/spike,0.0418mg) in the first season but in the second season gave 44.93 cm2,48.83 grain/spike,0.0423 mg respectively.The cultivar Tahaddi gave higher chlorophyll content, spike.m-2 and grain yield(46.11 Spad units ,329.9 spike/m2,6.30 t/ha)first season while in second season it gave (42.40 Spad units ,332.0 spike/m2,6.29 t/ha),respectively.The well water gave highest values in flag leaf area ,chlorophyll content ,spikes/m2and grain yield (43.89 cm2,42.97 Spad units,319.2spike/m2 and 6.78 t/ha)for first season and 42.77 cm2,42.84 Spad units,305.9spike/m2and 6.38 t/ha for second season, respectively.There was no significant interaction in the first season but in second season ,the cultivars IPA99 and IRAQ which irrigated with well water gave higher flag leaf area,number of grain/spike(46.85cm2,50.14grain/spike), respectively. There were significant differences. IPA99,IRAQ which irrigated with well water gave higher flag leaf area ,when number of grain in spike 46.85cm2,50.14 grain/spike respectively.The cultivar Tahaddi which irrigated with well water gave higher chlorophyll content in flag leave ,number of spikes/m2 and grain yield(43.97 Spad units,346.9 spike/m2 ,7.29 ta/h).It can be concluded that well water gave highest yield for wheat because of its high content of nutritive agents.