Journal of Taiwan Agricultural Research

Author:Su-Chen Lin*, Zi-Jun Lin, and Shiuan-Yuh Chien

Abstract:

    Only bio-fertilizers with good quality can assure their promotion in plant nutrients absorption and growth in the field, and the supervision of product quality from government side could play a key role not only in helping bio-fertilizers providing a better and consistent results in the field, but also in eliminating products with bad quality. Both efforts could enhance the farmers’ confidence in these microbial products. In this report, all of the analysis results of commercial phosphate-solubilizing bio-fertilizers, purchased from markets from 2017 to 2018, were documented. The scope of product analysis included total plate count of viable microbes, contamination rate, phosphate-solubilizing halo zone, phosphate-solubilizing activity, and target species identification. All of methodologies followed the publications by Agriculture and Food Agency (AFA). In 2017, only 5 out of 14 commercial products (36%) met the requirements by AFA. In 2018, only 8 out of 16 commercial products (50%) met the requirements by AFA. This is the first product quality report about commercial phosphate-solubilizing bio-fertilizers in Taiwan. This results will be submitted to AFA and be contributed to the revision of the management regulations of bio-fertilizers in the future.

Key words:Bio-fertilizer, Phosphate-solubilizing bacteria, Quality supervision

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