PERFORMANCE OF SOME WHEAT GENOTYPES UNDER DIFFERENT LEVELS OF IRRIGATION AND NITRGEN FERTILIZATHON

Abstract

The present investigation was carried out during the two succes:sive

seasons 2003/2004 and 2004/2005 at the Experimental Farm, FacultJ of Agriculture Minufiya University to investigate the effect of irrigation (three1 and five irrigations) and nitrogen fertilizer (35 and 70 kg.N./fed.) on the grdwth, . I physiological behaviour and yield and its components of wheat genotypes. I The experimental plots were arranged in a combined experiment in plit­ split plot design with three replications. Irrigation levels were rand1omly I allocated to the main plots, nitrogen fertilizer levels were assigned the sub plots, while genotypes occupied the sub-sub plots. I The results obtained from this study could be summarized as follows:-

The studied characters: I A- Growth and flowering characters:- I 1. Plant height (em.) I 2 I 2. Flag leaf area (cm ) I 3. Length of flag zone (em.) I 4. Days to 50% heading (day) I B- Drought characters : I I 1. Relative water content (R.W.C.) I 2. Osmotic pressure (O.P.) I C-Yield and yield components: I 1- Spike length (em). I I 2- Number of spikelets/spike. I 3- Number of grains/spike i f 4- Number of grains/spikelet. I 5- Spike density. I 6-Number of spikes/m2 I 7- 1000-grain weight (g). I 8- Grain yield (ardab per faddan). I 9- Straw yield (ton/fed.). I 10- Biological yield (ton/fed.) I 11- Harvest index (%).