Abstract
Dixired peach transplants which were budded on peach seedling rootstock and planted on black polyethylene bags containing 9 Kg soil were fertilized with three levels of sulphur ( 0 , 250 and 500 mg. S Kg-1soil ) and phosphorus ( 0 , 15 and 30 mg P Kg-1 soil ) .The agriculture sulphur ( 95 % S ) and triple super phosphate ( 22 % P ) used as a source for sulphur and phosphorus respectively , which were mixed with soil when the transplants planted in the bags at the 17th of febroury at both seasons . Transplants were sprayed with three levels of GA3 ( 0 , 15 and 30 mg. GA3 L-1 ) twice at both seasons , first spray was after 45 days from full buds burst , while the second was after one month from the first spray . Results indicated that application of sulphur , phosphorus and GA3 each alone and all interactions among them significantly increased N , P , K and S concentrations in the leaves in both seasons , except the effect of GA3 on N concentration in the leaves at both seasons , and the effect of phosphorus on leaves K concentration at the second season only . The treatment 500 mg. S Kg-1 soil + 30 mg. P Kg-1 soil + 30 mg. GA3 L-1. was the best , which gave the highest means of P , K and S at both seasons , the concentration of N , P , K and S on it was respectively 2.38 , 0.19 , 2.31 and 0.27 % in the first season and 2.57 , 0.23 , 3.38 and 0.35 % in the second season .
