炭化温度和时间对盐角草生物炭产率及理化性质的影响

doi:10.13866/j.azr.2019.03.11

Abstract

Abstract: Xinjiang is the largest area where saline soil is distributed in China,and rich in resources of halophytes with high capability of accumulating salt. In this paper,the effects of carbonization temperature and time on biochar yield and physicochemical properties of Salicornia europaea were analyzed.The results showed that the carbonization of S.europaea could effectively increase the values of pH,EC and ash content,in which the pH value could be reached to 10.37 and the ash content could be increased by 57.51%-110.98%.With the increase of carbonization temperature (300-600 ℃),the pH,EC and ash content of biochar were increased significantly,but the biochar yield was decreased.The contents of water-soluble Ca²⁺,Mg²⁺,total C and total N were decreased with the increase of temperature (≥400 ℃),but the contents of water-soluble Na⁺,K⁺,total P and total K were increased.In addition,with the increase of carbonization time,the pH,EC and contents of ash and water-soluble ions were increased gradually,but the content of total C was decreased.According to the physicochemical properties and preparation cost of biochar,it was considered that the best carbonization time was for 2 hours.This study could provide a reference for selecting the raw materials for improving acidic soil under biochar and the optimization of plant biochar preparation process.

Key words: Salicornia europaea, biochar, carbonization temperature, carbonization time, physicochemical property

MAO Ming-yue, ZHAO Zhen-yong, WANG Shou-le, TIAN Chang-yan. Effects of Carbonization Temperature and Time on the Yield and Physicochemical Properties of Biochar from Salicornia europaea[J].Arid Zone Research, 2019, 36(3): 614-620.

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Effects of Carbonization Temperature and Time on the Yield and Physicochemical Properties of Biochar from Salicornia europaea

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