Author：Jeng-Hsien Tsai^1,*, Tian-Yih Wu²

Abstrct：

    The verification field test and the integrated fertilization test of phosphate-solubilizing microbial fertilizers were carried out at taro in paddy field at 2018. Fertilizer verification field test used 2 kinds of commercially available liquid phosphate-solubilizing microbial fertilizers. This field test had 9 treatments according to the rate of fertilizer and phosphate-solubilizing microbial fertilizers type. The integrated fertilization test aim at the development of microbial fertilizer, chemical fertilizer and organic fertilizer integrated fertilization technology, which will help in confirm the effect of phosphate-solubilizing microbial fertilizers. Fertilizer verification field test showed that full rate of fertilization has the highest nutrient absorption, biomass and yield, may caused by the high soil exchange potassium which result in the supply of nitrogen becomes a limiting factor. The treatment of 2/3 rate of fertilization and application of one kinds of phosphate-solubilizing microbial fertilizers, nutrient absorption, biomass and yield are not significant different with full rate of fertilization. The integrated fertilization test showed that under the same fertilizer rate, the root length was longer than that of the control treatment, the shoot width, leave length, leaf width and biomass were higher than that of the control, and the yield was higher than that of the control treatment. The application of phosphate-solubilizing microbial fertilizers at taro in paddy field must base on well soil fertility. Increasing in frequency and times of microbial fertilizer application may strengthen the fertilizer effect.

Keywords: taro in paddy field; phosphate-solubilizing microbial fertilizers; integrated fertilization.

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* Corresponding author, e-mail: tsaijh@mdais.gov.tw
¹ Assistant Researcher, Miaoli District Agricultural Research and Extension Station , Miaoli, Taiwan, ROC.
² Associate researcher, Miaoli District Agricultural Research and Extension Station , Miaoli, Taiwan, ROC.

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