Author：Su-Chen Lin^1,*, Zi-Jun Lin², and Shiuan-Yuh Chien³

Abstrct：

    Only bio-fertilizers with good quality can assure its promotion in plant nutrients absorption and growth in the field, and the supervision of product quality from government side could play another key role not only in helping bio-fertilizers provide 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 zone, phosphate-solubilizing activity, target species identification. All of methodologies followed the publications by Agriculture and Food Agency (AFA). In 2017, only 5 among 14 commercial products (36%) met the requirements by AFA . In 2018, only 8 among 16 commercial products (50%) met the requirements by AFA. This is the first product quality report about commercial phosphate-solubilizing bio-fertilizers. This result will be submitted to AFA and referred to revise the management law of bio-fertilizers in the future.

Keywords：Bio-fertilizer, Phosphate-solubilizing bacteria, Quality supervision.

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* Corresponding author, e-mail: linmay@tari.gov.tw
¹ Assistant Researcher, Agricultural Chemistry Division, Taiwan Agriculture Research Institute, Taichung, Taiwan, ROC.
² Research Assistant, Agricultural Chemistry Division, Taiwan Agriculture Research Institute , Taichung, Taiwan, ROC.
³ Former Researcher, Agricultural Chemistry Division, Taiwan Agriculture Research Institute, Taichung, Taiwan, ROC.

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