A field experiment was conducted for two seasons to estimate the effects of integrated use of organic and inorganic fertilizer on N, P and K uptake efficiency of maize crop. The experiment was laid out in split randomized complete block design, the main plots were occupied by two maize cultivars, the sub plots included two levels of NPK fertilizer (20:20:20) at 500 and 1000 kg/ha and the control which was supplied with 100kg/ha of NPK, where the sub plots were involved eight treatments of organic manures included alfalfa green manure, chicken manure, cow manure and their combinations. The results didn’t show any significant differences at p ≤0.05 between the two cultivars and nitrogen levels in nutrients uptake. The highest nutrients uptake efficiency by the total biomass under organic fertilizers treatments at harvest stage for both seasons was achieved by the combination of alfalfa and chicken manure, which was 37.2, 7.6 and 17.7 (%)for the first season and 28.5, 4.8 and 8.3 (%) for the second season for N, P and K respectively. Nutrients content for straw and grain were increased for all treatments on the second season, while the NPK uptake was decreased.
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