矿物质调理剂中铝的稳定性及其对酸性土壤的改良作用

发布时间：2018-02-16 13:42

本文关键词： 矿物质调理剂土壤改良铝毒害模拟酸雨　出处：《土壤》2017年02期 　论文类型：期刊论文

【摘要】：通过室内土壤培养试验和模拟酸雨浸泡试验,研究了3种含铝量不同的矿物质调理剂中铝的稳定性及其对酸性土壤的改良效果。该类调理剂是利用钾长石、白云石和石灰石等合理配伍后经高温焙烧而制得,呈弱碱性,富含有效钙、镁、钾、硅等营养元素。试验结果表明,施入0.5~2 g/kg调理剂培养60 d后,土壤pH由4.98升高到5.04~5.42,交换性铝含量下降37.40%~68.90%,吸附态羟基铝含量稍有增加,但毒害性铝和活性铝总量分别降低了5.37%~9.50%和4.33%~12.08%,提高土壤中交换性钙、镁、钾和有效硅的含量。同时模拟酸雨浸泡试验中铝溶出量明显降低。该类矿物质调理剂能中和土壤酸度、缓解铝毒和增加土壤养分;调理剂中铝稳定性较高,不会对土壤铝毒产生叠加效应,可安全应用于农业生产。
[Abstract]:The stability of aluminum in three mineral conditioners with different aluminum content and their improvement effect on acid soil were studied by means of indoor soil culture test and simulated acid rain soaking test. This kind of conditioning agent was made of potassium feldspar. Dolomite and limestone were prepared by calcination at high temperature, with weak alkalinity, rich in available calcium, magnesium, potassium and silicon. The results showed that 0.5 g / kg conditioning agent was applied for 60 days. The soil pH increased from 4.98 to 5.04 ~ 5.42, the exchangeable aluminum content decreased 37.4040 ~ 68.90, the adsorbed hydroxyl aluminum content slightly increased, but the total toxic aluminum and active aluminum decreased 5.37 ~ 9.50% and 4.33 ~ 12.08%, respectively, which increased the exchangeable calcium and magnesium in the soil. The content of potassium and available silicon. At the same time, the amount of aluminum dissolved in simulated acid rain soaking test decreased obviously. This kind of mineral conditioner can neutralize the acidity of soil, alleviate aluminum toxicity and increase soil nutrients, and the stability of aluminum in conditioning agent is high. It does not produce superposition effect on soil aluminum toxicity and can be safely used in agricultural production.
【作者单位】：华南理工大学环境与能源学院;工业聚集区污染控制与生态修复教育部重点实验室;
【基金】：国家科技支撑计划项目(2015BAD05B05+2) 广东省科技计划项目(20130323c) 广州市2016年污染防治新技术新工艺示范和应用项目资助
【分类号】：S156.2

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