Studies on fertilization requirements of turmeric (curcuma domestica val.)‎ Plant : effect of chemical fertilizer, yeast and biofertilization on vegetative growth of turmeric

الملخص EN

This study was carried out in the Experimental Farm of Faculty of Agriculture, Cairo University, Egypt during two successive seasons 2004, 2005 to investigate the effect of chemicals, yeast and bio fertilization on vegetative growth of turmeric (Curcuma domestic Val.) plant.

One level of the following bacterial strains mixture was used : Azotobacter chroococcum, Azospirillum lipoferum, Bacillus polymixa, Bacillus megatherium and Pseudomonas fluorescence.

Also one level (6g / litre) of active dry yeast (Saccharomyces cerevisiae), in addition to three levels from the recommended dose (zero, 50 % and 75 %) of nitrogen and phosphorus (120 N kg / hectar and 60 P2O5 kg / hectar) were applied.

The results of these experiments can be summarized as follows : The treatment of biofertilizer + 75 % of the recommended dose of both nitrogen and phosphorus fertilizer led to the highest values of vegetative parameters such as (plant height, stem diameter and leaf area) compared to control plants.

Also, it increased rhizome fresh and dry weight per plant and per feddan) compared to using active dry yeast + the same treatment of chemical fertilizers or using chemical fertilizers alone.