An evaluation of various mineral and bio-fertilizers applications on growth , prouductivity and seed oil content of nigella sativa in calcareous soils

الملخص EN

Two field experiments were carried out in a clay loam calcareous soil to evaluate different applications of mineral and bio-fertilizers on growth, yield and oil content of Nigella sativa.

Large difference in the growth of plants between the control and all fertilizer treatments were recorded.

The seed yield, oil content, yield of oil and nutrients uptake improved significantly (P < 0.05) by the application of ammonium sulfate (300 kg/fed) + Azotobacter.

Improvements were also noticed, but to a lesser extent, by the application of ammonium sulfate (300 kg/fed) alone or ammonium sulfate (150 kg/fed) + Azotobacter in descending order.

Mineral nitrogen and Azotobacter individually or in combination increased plant N content.

There was a slight improvement in the P and K content due to the application of Azotobacter.