الفهرس 
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Abstract
A pot experiment was conducted at the experimental farm of Faculty of Agric., El-Mansoura Univ. during the winter season of 2008-2009 to investigate the uptake of applied and residual phosphorus by wheat (Triticum aestivum L.) plants as affected by mycorrhiza inoculation under saline condition. 24 treatments were arranged in split-split plots design, which were the simple possible combination between two treatments of mycorrhizal inoculation, three levels of salinity and four levels of P-fertilization. The obtained results show as the following;
• The mean values of fresh and dry weight of wheat shoots (g pot-1) were significantly decreased with increasing salinity levels from S0 to S2 at the both growth stages (at 60 and 124 days from planting).
• Concerning the effect of phosphorus application, increasing phosphorus rates from P1 up to P3 was effective for increasing the fresh and dry weight of wheat roots than the unfertilized plants.
• The plant height (cm) and numbers of spikes were significantly affected by AM inoculation, salinity levels and phosphorus application except with the plant height (cm) had no significant effect at the 2nd stage (at 124 days from planting).
• A marked increase in weight of grains (g pot-1) was evident as a result of increasing phosphorus application and the increase was significant. On the contrary, the mean values of 1000-grains were not significant affected by phosphorus application.
• The highest mean value of chlorophyll was 52.9 obtained from P3 and S0 with I1 at 60 days from planting.
• The difference comparison between the average values of N, P and K% in wheat shoots and roots as affected by AM inoculation, salinity levels and phosphorus application were significantly increased. It can be noticed that, adding 100 from recommended dose (P3) and soil salinity 1 dSm-1 (S0) combined with AM inoculation (I1) gave the highest value of N, P and K % in wheat roots.
• With AM inoculation under any level of salinity with using phosphorus fertilization had no significant effect on Na % in wheat shoots and roots at 1st and 2nd stages of growth.
• Phosphorus application positively increased the mean values of N, P, K , Na and protein% in grains.
• Availability of soil P at different soil depths was highly affected by microbial inoculation. Available P was significantly increased with AM inoculation under the addition of P3 in absence of salinity. In addition, values of available P were increased in the surface layer (0-10 cm) and decreased in the subsurface layers (10-20 cm) and (20-30 cm).