The current work was conducted to illustrate the effectiveness of organic manure use to substitute part or all the chemical fertilizers, as well as the biofertilizers and foliar spray of micronutrients effect on maize yield, crop production and grain mineral content.
A field experiment was carried out during the growing season of 2004/2005 where maize plants were grown on sandy and clayey soils. Fertilization treatments which were used in these experiments were foliar application with micronutrients, organic manure application, inoculation of maize seeds with Rhizobactrin a composite contains “Rhizobium leguminosarum” bacteria, combinations of them and control.
Results showed significant increase in straw and grain yields of maize plants using the substantial addition of the tested fertilizers when applied individually or together. The highest straw and grain yields were recorded with the treatments of biofertilizers alone or in combination with other fertilizers. Nitrogen and Phosphorus uptake in grains were significantly increased with using all fertilizer treatments, while no significant increase in K content due to such fertilizers treatments was noted except with treatments of organic manure plus biofertilizers and micronutrients plus organic manure. N, P and K contents were increased with adding each one of the tested treatments. Fe, Mn and Zn uptake in both grains and straw increased by fertilizers application. The increase was slight when the mineral source of them was applied alone, the Fe, Mn and Zn uptake and contents increased markedly when the mineral micronutrients were combined with biofertilizer or with bio. and organic fertilizers.