تأثير مواعيد و مستويات إضافة البوتاسيوم في نمو حنطة الخبز

الملخص EN

A field experiment was conducted at the experimental farm, Dept.

of Field Crop, Coll.

of Ag-riculture, Univ.

of Baghdad, during 2011-2012 Winter Season, to Study the effect of potassium fertilizer levels and appilication stage on some growth characteristies and physiological indexs of wheat Triticum aestivum L.

( Var-Abu-Ghraib-3).

Factorial experiment was conducted with RCBD design with three replications involved two levels of Pottasum 120, 180 Kg.ha-1, and control treatment the second factor was three stage of application (tillering , Booting, flower-ing).The stage, results showed, 120 Kg.K.ha-1 was Superior in (dry weight, crop growth rate, relative groth rate in physiology maturity with an increase of 4.82, 4.77, 0.73% as compared to application level 180 Kg.K.ha-1 , which was superior in flag leaf area, chlorophyll concen-tration and spike length with an increase of 14.08, 9.74, 13.34% as compared to potassium application in 120 Kg.K.ha-1.

Application stages was superior in plant hight, Chlorophyll con-centration and application potassium at tillering gave dry weight high, The highest crop growth rat and, relative growth rate were 614.59 gm, 13.21gm.m-2.day-1 0.0411 gm.gm-1.day-1.

The interaction between two factors was significantly in all characteristicsa studying.