حاصل البذور و نوعيته لراتون الذرة البيضاء بتأثير التسميد النيتروجيني

Abstract EN

Afield experiment was conducted during the spring and fall seasons of 2013 at the experimental farm, Department of Field Crop, College of Agriculture, University of Baghdad, to investigation the effect of nitrogen fertilization (150, 300 and 450 kg N ha-1) in grin yield and seed quality of ratoon sorghum of Inqath variety.

The method of agriculture was significant in all the studied characters except number of seeds per head.

The ratoon method gave high significant values for the number of heads, kernel weight, grain yield, harvest index (HI) percentage of protein and field emergence (12.58 head.m-2, 14.92 gm-2, 7.51 tons ha-1, 0.3611.30% and 59.8%), respectively.

The direct seeding (by seeds) gave high significant values of the head weight (71.4 gm).

The direct seeding gave high significant values of seeds content of carbohydrates (32.25%).

Results of statistical analysis also indicates that there was significant effect of fertilizers application of at 300 kg N.ha-1 gave high significant values for the head weight, number of heads and grain yield (70.5gm, 14.5 head m-2 and 8.37 tons.ha-1 respectively).

Increased nitrogen fertilization gave a significant improvement of seeds quality, the higher level of N fertilizer (450 kg N ha-1) the higher values of the percentage of protein and field emergence (11.93% and 64.0% respectively).

By contrast, the seed content of carbohydrates performance was decreased with the increase of level of nitrogen fertilizer to reach its lowest average (29.21%) at the level of (450 kg N ha-1).

However, we recommend using the ratoon method cultivation as it increases the grain yield by 37% and improved its quality.