Abstract :

This study aims to analyse the effects combination of compound fertilizer and  rhizobacteria sources on the agronomic characters of shallot in off season. The study was conducted in Sleman, Yogyakarta from February to June 2019. The experiment was arranged in a R C B D with three replications. The treatment consisted of combination  between compound fertilizer (AS) first factor was dosage (150, 250 and 350 kg ha^-1) and 5%  rhizobacteria from different three sources (rhizobacteria bamboo, rhizobacteria glyricidae and rhizobacteria peanut) each concentrasion and control. The observed were made on the growth and yield of bulb, and the data were analyzed using analysis of variance and Duncan’s Multiple Range Test at P< 0.05. There was no interaction between indigenous rhizobacteria sources and AS fertilizer on all variables. The dosage of  AS fertilizer up to 350 kg ha^-1 did not improve the plant growt. However, there was an increase in bulb yield when 150 kg ha^-1 at AS was applied. The application of indigenous rhizobacteria from bamboo root significantly increased the growth of shallot. The application of AS 150 kg ha^-1 combined indigenous rhizobacteria  bamboo root at 5% is recomended to promote shallot production in offseason  as well as to minimize the  input cost of inputs and environmental pollution.

 

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Keywords :

Ammonium sulphat, harvest index, indigenous rhizobacteria bamboo, relative growth rate.

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