Pakistan Journal of Biological Sciences1028-88801812-5735Asian Network for Scientific Information10.3923/pjbs.2002.1181.1185El-HawaryM.I. FatmaI. El-Hawary. A.M. El-Ghamry E. El-Naggar 112002511The effect of some wheat genotype grains inoculated with Azosperillum brasilense and Azorhizobium caulinodanse on wheat yield and NPK uptake was evaluated under different levels of liquid N-fertilization (0, 50 and 100% from the recommended N Kg/fed). Inoculation with any biofertilizer leads to considerable improvement in wheat grain and straw yield as compared with their respective control. However response differed according to the type of boifertilizers. The superiority related to Azorhizobium inoculation was clear on grain yield followed by inoculum containing a mixture of Azorhizobium and Azosperillum, although the use of Azosperillum gave the lowest response, but it was still higher than the uninoculated plants (control). Increasing levels of nitrogen caused increase in the wheat grain and straw yields, but the response was remarkably high at 100% N. The differences in grain yield became much lower when Azosperillum in combination with decreasing levels of N-fertilizer were used. The relative increase was 4.8% (when Azorhizobium + 100% N were used. At the same time the application of 100% N exceeded using both 100% N + Azosperillum (13.3%) and 100% N + mixture of inoculation (12.54%). Application of 100% N mixed with Azorhizobium + Azosperillum inoculum gave a positive effect and also affected the 1000-grains weight. This response varied according to the wheat varieties especially with Sakha 8 which gave the highest response. Differences in NPK uptake depend on wheat genotype and on different microbial treatments. The application of Azorhizobium +100% N enhanced the mineral uptake followed by mixture of 100% N + (Azosperillum + Azorhizobium) inoculums.]]>Aly, S.S.S., S.M. Soliman, E.A. Elakel and M.E. Alinit, 19991999Amellal, N., G. Burtin, F. Bartoli and T. Heulin,19986437403747Bashan, Y., 198618297301Batten, G.D., A.B. Blakeney, S.M. Glennie-Holme, R.J. Henry, A.C. McCaffery, P.E. Bacon and D.P. Heenan, 199154191197Bhattarai, T. and D. Hess, 1998Azospirillum spp. At various levels of nitrogen fertilization. ]]>267277Dobbelaere, S., A. Croonenborghs, A. Thys, A. Vande Broek and J. Vanderleyden,1999Azospirillum brasilense wild type and mutant strains altered in IAA production on wheat.]]>212153162El-Din, G.M.S. and R.T. Abdrabou,199533973986El-Hawary, I.L., I. Ibrahim and F. Hammoud,199855157El-Kased, F.A., R.N. Kamh and B.F. Abd-el-Ghany,199946373386El-Sersawy, M.M., B.F. El-Ghany, K.W. Khalil, S.Y. Awadalla, 199737367397Gallo, M. and I. Fendrik,1994Azospirillum.]]>1994pp: 57-75pp: 57-75Hammouda, F.M., K.A. Faiza and M.N. Dawlat, 2001210211030Jackson, M.L.,19671st Edn.,Ladha, J.K., R.B. So and I. Watanabe, 1987Azospirillum species associated with wetland rice plant grown in different soil. ]]>12127129Lindsay, W.L. and W.A. Norvell,197842421428Nelson, L.M. and R. Knowles, 1978Azospirillum brasilense grown in continuous culture. ]]>2413951403Okon, Y.,1985Azospirillum as a potential inoculant for agriculture.]]>3223228Omar, M.N.A., 1995Azospirillum brasilense NO40 (Cerealin) in two rice cultivars using N-15 dilution technique. ]]>1995Omar, M.N.A., M.H. Hegazy, R.A.A. El-Aziz, M.S.M.A. Soliman and M.M. Sobh,19913699104Omar, M.N.A., N.M. Mahrous and A.M. Hamouda, 199641579590Peterburgski, A.V., 1968pp: 29-86pp: 29-86Piper, C.S., 1974Reynders, L. and K. Viassak, 1982Azospirillum brasilense as biofertilizer in intensive wheat cropping. ]]>66217223Sabry, S.R.S., S.A. Saleh and G.A.A. Mekhemar, 1998Triticum aestivum L. to inoculation with Azorhizobium caulinodans and Azospirillum brasilense under different nitrogen levels. ]]>12431444Sharaan, A.N. and F.S.A. El-Samie,1999Triticum aestivum L.).]]>44589601Sriskandarajah, S., I.R. Kennedyand, Y.T. Tchan, 1993Azospirillum brasilense and wheat. ]]>153165178Soliman, A.S., S.M. Elakel and M.E. Ali, 199950347365Webster, G., V. Jain, M.R. Davey, C. Gough, J. Vasse, J. Denarie and E.C. Cocking,1998Azorhizobium caulinodans.]]>21373383Zaghloul, R.A., A.A. Amer and M.H. Mostafa, 1996Azospirillum brasilense for wheat manuring. ]]>34627640