Response of black cumin (nigella sativa l.) to fertilization with chicken manure, mineral N fertilizer and varying K doses under different soil moisture contents [electronic resource].

Includes references.

A pot experiment was conducted under greenhouse conditions at the experimental farm, Faculty of Agriculture, Zagazig University, Egypt, during the 2008-2009 winter season to investigate the effect of different soil moisture contents, nitrogen sources i.e. chicken manure (ChM) and ammonium sulphate (AS) at rates of 0, 60 and 120 mg N ki1 soil, as well asK fertilization (0, 40, 60 and 80 mg K kg-1 soil) and their combinations on the production and quality of black cumin plant (Nigella sativa L.) grown on a clay soil. All treatments and their interactions had significant effects on the seed yield and growth characters as well as oil content, protein content and macronutrients content and uptake. The highest values of seed protein yield, N, P and K-uptake were obtained due to the addition of 120 mg N kg-' as ChM and 80 mg K ki' under moisture content of 60% of field capacity (FC). While, the maximum values of seed yield and oil yield were attained due to application of 120 mg N kg-' as AS and 80 mg K kg-' as well as 120 mg N kg-1 as AS and 60 mg K kg-1 , respectively under moisture content of 60% FC. The maximum values of 1 000-seed weight and protein content were achieved under moisture content of 80% FC due to 120 mg N kg-1 as ChM and 60 mg K kg-1 for 1000-seed weight and 120 mg N kg-1 as ChM and 40 mg K kg-1 for protein content, respectively. While, the highest one for each of dry weight planf1 and straw yield resulted owing to application of 120 mg N ki1 as ChM and 80 mg K kg-1 under moisture content of 80% of field capacity (FC) treatment.

Summary in Arabic.

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