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Abstract
The present study included three experiments, first one was
allotted to Cerealine; second for Phosphorine; and the third for
Microbine under different levels. Sandy and clay soils were used to access the different features of such interactions involved in the experiment regarding the studied characteristics. Two
sources of N-fertilizers were used, viz., ammonium nitrate (AN)
and ammonium sulphate (AS) along with superphosphate in combinations with the studied biofertilizers. In Cerealine experiment, in both soils (the clay and sand), inoculation increased straw yield particularly where the high rate
of inoculation was used. The results show that grain yield increased by inoculation. The increase was marked in the sand soil. In the clay soil inoculation increased grain yield,
particularly in absence of N. The effect of interactions between
Cerealine, N-sources and rates was highly significant as regards to N-uptake by plants in the clay and sand soils and the greatest value of N-uptake was obtained from the clay soil. In Phosphorine experiment, in the clay soil,’ inoculation caused a decrease on the straw yield where no P or low or high rates of P was applied, but in the sand soil, the positive effect of
inoculation occurred in presence of the low P-rate. Values of grain yield obtained by application of Phosphorine in the clay soil showed an increase only where P was either not .applied or
applied at the high rates, but in the sand soil inoculation with
Phosphorine caused an increase only where no-P, or where the low rate of P was present. Uptake of N increased by inoculation in the clay soil. This increase was particularly significant in grains and where P was applied at low and medium rates. Also in the sand soil, uptake of N increased by inoculation. This was considerable in grains, and where P was not applied, or applied at low to medium rates. In Microbine experiment, in the clay
soil, data indicate that treating the seeds with the low level of
Microbine (7.1 g/kg seeds) gave the better results of straw yield
than the high level (14.2 g/kg seeds) particularly under conditions of AS + SP. In the sand soil, inoculation increased straw yield under all conditions of mineral fertilization. Results of the grains yield show positive effect of inoculation by
Microbine in both soils and under mineral fertilization of no mineral fertilization. Regarding N-uptake, in both soils, the high rate of Microbine gave higher N-uptake by grains than with the lower rate. In straw, the same trend was observed in the clay soil. In the sand soil, the higher N-uptake was observed with the lower rate of Microbine.