Response castor bean (ricinus communis l.)‎ To topping and some microelements in sandy soil

الملخص EN

Field trials were conducted during two successive seasons 2006 and 2007 in the Experimental farm EL-Qussasin Research station-Ismailia governorate to study the effect of topping and applying micro elements (Iron, Zinc and Manganese) as spraying treatments at the rate of 100 ppm on vegetative growth, seed yield and fixed oil of castor bean plants The data showed that topping treatment gave the highest significant values of the vegetative growth and seed yield.

Treating plants with micro elements significantly increased vegetative growth and seed yield compared with control As for fixed oil percentage data indicated that, no topping treatment significantly increased oil percentage than topping treatment and the micro element treatments showed significantly increase the oil percentage.

Application of Zn treatment at 100 ppm significantly increased vegetative growth, seed yield and oil percentage compared with other micro elements treatments.

G.

L.

C.

analysis of extracted fixed oil showed that the oil, contains palmitolic, stearic, linolinic, ricilonic and these components were affected by some treatments under study.