Effect of Combination Between Organic and Mineral Fertilization on Productivity of Some Safflower Genotypes

A field experiment was carried out during 2008/2009 and 2009/2010 seasons in Agriculture farm, Sebha University, Libya to study the response of some safflower varieties(S , Giza and Dem ) to fertilization by 350 1 137 farm yard manure (FYM) combination with mineral nitrogen fertilizers (0 ton FYM+105 kg N, 1.538 ton FYM +95kgN, 3.076 ton FYM +85 kg N, 4.614 ton FYM + 75 kg N, 6.152 ton FYM + 65 kg N and 7.690 ton FYM + 55 kg N/ha) under sandy soil condition using of sprinkler irrigation system. Results revealed that Giza variety 1 surpassed the other two varieties in all studied traits, except oil percent in the two growing seasons. On the other hand, Dem variety recorded the maximum values of seed oil content. FYM at all tested rates significantly 137 increased plant height, number of primary branches/plant, number of heads/plant, 100-seed weight, seed yield / plant, seed yield/ha as well as oil yield/ ha when compared with the control treatment (0.0 ton FYM+105kgN/ha) with the superiority for the highest FYM rate (7.690 ton FYM +55kg N/ ha) which exhibited the upper most values of the previous traits. The interaction between safflower varieties and fertilization treatments had a significant effect on the most tested traits in both seasons. The highest values of the previous traits were obtained when Giza safflower variety was supplemented by the combination rate (7.690 ton FYM 1 +55kgN/ ha).