SORPTION OF FUSILADE ON SOME SOILS AND ITS EFFECT ON THE RELEASE OF NUTRITIVE ELEMENTS

A greenhouse pot experiment was conducted to investigate the effect of fusilade herbicide sorbed by some soil mineral components on the release of some nutritive elements. Combination (2% Tween 20 as spreading agent and 2 % molasses (M) as sticking agent) to herbicides spray solutions applied to two calcareous soils with different textures from Abis and El-Hammam sites, in Northwestern Coast of Egypt. The results reveal that applying fusilade in combination with additives at recommended rate (2.5 l/ ha) were the most effective treatments on release of macro- and micronutrients in both soils as well as increasing vegetative growth and chemical composition of faba beans. Combined fusilade with additives at the rate (2.5 l/ha) showed a significant increase in available N, (23.62 and 14.36%), P (40.77 and 20.03%), K (41.25 and 26.41%), in Abis and El-Hammam soils, respectively. Significant (p <0.05) increase in available Fe (47.14 and 37.31%), Zn (78.13 and 32.03%) and Mn (8.63 and 6.02%) was observed. There was significant gradual reduction in Cu (16.79 and 21.05%) in Abis and El-Hammam soils, respectively.