تأثير مسافات الزراعة بين الخطوط و معاملات ما قبل الحصاد في الصفات النوعية للخردل الأبيض (Sinapis alba L)‎

الملخص EN

To study the effect of row space and pre-harvest technique treatments on qualitative characters of white mustard, Sinapis alba L, Experiment was conducted in the field of experiments at the College of Agriculture , University of Baghdad /Abu - Graib during 2003 - 2004, using split plots design with three replications arranged in RCBD , the main treatments included three row space 20 , 40 and 60 cm.

while the sub – plot treatments included pre-harvest treatment of plants which included plants harvested at physiological maturity stage, harvest of plants at full maturity stage , harvest of plants at full maturity stage after GA3 application, and harvest of plants at full maturity after Auxin application.

The results obtained showed: Row space of 20 cm lead to significant increase in oil percentage of seeds , oil yield and volatile oil yield which were 39.02% , 879.7 kg / ha , and 1.67 L / ha respectively as compare with row space of 60cm which gave 36.34 %, 518.23 kg/ha, and 1.16 L/ha respectively.

Row space of 60 cm lead to significant increase in percentage of seeds field germination 84.17% followed by row space of 40 cm while row space of 20 cm gave least percentage to this character 76.58%.

Treatment of plant harvested at full maturity stage after Auxin application affected significantly percentage of oil in seed ,oil yield and volatile oil yield which were 38.83%, 773.86 kg/ha and 1.46 L/ha respectively comparative with treatment of plants harvest at physilogical maturity stage which gave least percentage of oil in seed, oil yield and volatile oil yield which were 35.63%, 642.7 kg/ha and 1.30 L/ha, respectively.

However treatment of plants harvested at philological maturity stage affected significantly in increase the percentage of protein which gave %19.45 as compare to treatment of plants harvested at full maturity after Auxin application which gave 15.76% .

Also the same treatment lead to significant increase in percentage of unsaturated fatty acid Eicosenoic acid, seeds laboratory and field germination which were %15.47, 93.22% and 83.89%, respectively.

while treatment of plants harvested at full maturity gave 14.22 %, 91.00% and 75.67%, respectively.