Pyrolysis temperature influences ameliorating effects of biochars on acidic soil.

作者: Qing Wan , Jin-Hua Yuan , Ren-Kou Xu , Xing-Hui Li

DOI: 10.1007/S11356-013-2183-Y

关键词:

摘要: The biochars were prepared from straws of canola, corn, soybean, and peanut at different temperatures 300, 500, 700 °C by means oxygen-limited pyrolysis. Amelioration effects these on an acidic Ultisol investigated with incubation experiments, application rate was 10 g/kg. incorporation induced the increase in soil pH, exchangeable base cations, saturation, cation exchange capacity decrease acidity Al. ameliorating increased their pyrolysis temperature. contribution oxygen-containing functional groups to decreased rise temperature, while carbonates changed oppositely. led reactive Al extracted 0.5 mol/L CuCl2, content temperature incorporated biochars. generated 300 °C organically complexed due ample quantity such as carboxylic phenolic biochars, 500 accelerated transformation hydroxyl-Al polymers hydrolysis higher pH. Therefore, crop straw-derived can be used amendments for soils relatively high have great soils.

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