Evaluation of the application of rice husk biochar and various types of microbes on physiological and characteristics of shallot bulbs ( Allium ascalonicum L.)

Abstract

Abstract Shallot is a popular and widely developed horticultural crop in Indonesia. This study aims to evaluate the application of rice husk biochar and various types of microbes on the physiological and bulbs characteristics of shallot ( Allium ascalonicum L.). The research design used a split plot design. The main plot was rice husk biochar with three levels, namely control 0 t ha −1 , 2 t ha −1 , and 4 t ha −1 . As subplots, there were three types of microbes namely without microbes/control, Trichoderma asperellum, Beauveria bassiana , and Metarhizium anisopliae . The results optained that there was an interaction between the of rice husk biochar 4 t ha −1 with the Trichoderma asperellum which gave the best results for the chlorophyll index (19.70). The application of various types of microbes namely in the of Trichoderma asperellum gave the best results on bulb height (2.75 cm) and the number of bulbs per plant (1.61).

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