التأثير المتداخل بين الزنك و أشكال النتروجين في نمو نبات الذرة الصفراء في تربة كلسية

Abstract EN

A pot experiment was conducted at the green house of the college of agriculture – university of Baghdad using silty loam soil to study the interactive effect of nitrogen source , zinc foliar application on growth of tow Varity of maize (Buhooth 106 and Ipa 5012).

Treatments included 3 sources of nitrogen fertilizers (ammonium sulfate, potassium nitrate added either each alone or as mixture of both at rate of 200 KgN.ha-1 ).

Zinc applied as foliar at tow rates 0 and 20 mg Zn.L-1 .

Data of plant growth parameters (plant hight ,leave area , plant dry weight , zinc absorption) collected and measured at tow periods of time 30 and 45 days after emergence.

Results for the 1st period indicated the followings : Ammonium sulfate was the best source among other sources especially potassium nitrate in all plant parameters studied , Foliar zinc application (20 mg Zn L-1 )increased plant parameters compared to (0mg Zn L- 1 ), All tested parameters indicated that Buhooth 106 was better Varity than Ipa 5012.

Results of the 2nd period (45 days after emergence )although differ than the 1st one but at the same trend.

The best results for all tested parameters were obtained with ammonium sulfate as a source of nitrogen and with foliar application of zinc especially with Buhooth 106 variety which signify the importance of the N source , Zn application and plan Varity.