本文關(guān)鍵詞： 礦物質(zhì)調(diào)理劑 土壤改良 鋁毒害 模擬酸雨　出處：《土壤》2017年02期 　論文類型：期刊論文

【摘要】：通過室內(nèi)土壤培養(yǎng)試驗和模擬酸雨浸泡試驗,研究了3種含鋁量不同的礦物質(zhì)調(diào)理劑中鋁的穩(wěn)定性及其對酸性土壤的改良效果。該類調(diào)理劑是利用鉀長石、白云石和石灰石等合理配伍后經(jīng)高溫焙燒而制得,呈弱堿性,富含有效鈣、鎂、鉀、硅等營養(yǎng)元素。試驗結(jié)果表明,施入0.5~2 g/kg調(diào)理劑培養(yǎng)60 d后,土壤pH由4.98升高到5.04~5.42,交換性鋁含量下降37.40%~68.90%,吸附態(tài)羥基鋁含量稍有增加,但毒害性鋁和活性鋁總量分別降低了5.37%~9.50%和4.33%~12.08%,提高土壤中交換性鈣、鎂、鉀和有效硅的含量。同時模擬酸雨浸泡試驗中鋁溶出量明顯降低。該類礦物質(zhì)調(diào)理劑能中和土壤酸度、緩解鋁毒和增加土壤養(yǎng)分;調(diào)理劑中鋁穩(wěn)定性較高,不會對土壤鋁毒產(chǎn)生疊加效應(yīng),可安全應(yīng)用于農(nóng)業(yè)生產(chǎn)。
[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.
【作者單位】： 華南理工大學(xué)環(huán)境與能源學(xué)院;工業(yè)聚集區(qū)污染控制與生態(tài)修復(fù)教育部重點實驗室;
【基金】：國家科技支撐計劃項目(2015BAD05B05+2) 廣東省科技計劃項目(20130323c) 廣州市2016年污染防治新技術(shù)新工藝示范和應(yīng)用項目資助
【分類號】：S156.2

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