Preparation and performance evaluation of Bt compound GR based on peanut shell biochar
Based on the preparation of biochar at different pyrolysis temperatures,the biochar and additives were screened by biocompatibility experiments,and the formulation and process of GR were optimized by orthogonal experiments.The results showed that the peanut shell biochar(HS-5)prepared at the temperature of 500℃ had good compatibility with Bt.The optimized formula(mass fraction)were Bt powder 22％,carrier(HS-5)0.5％,wetting agent(nekal)2％,binder(magnesium aluminum silicate)2％,disintegrant(sodium chloride)2％.The optimum granulation technology were as follows:the diameter of the sieve pore was 1.0 mm,the drying time was 40 min at the temperature of 40 ℃.The indexes of the obtained GR met the national standards.The study provided a reference for the combined application of biochar and Bt.
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