本文選題：顆粒分析　切入點：機械組成　出處：《土壤通報》2016年02期 　論文類型：期刊論文

【摘要】：利用40kHz超聲波清洗機,設計不同的超聲功率和超聲時間,對火山碎屑物發(fā)育土壤進行分散處理;再用濕篩-吸管法測定土壤顆粒含量,對測定結(jié)果進行分析。研究表明:增大超聲功率能促進土壤顆粒的分散,但80w和140w超聲功率引起的土壤各粒級含量變化不大,均小于3.00%;延長超聲時間對火山碎屑物土壤分散效果影響顯著,對于粗顆粒為主的樣品各粒級含量變化均很小,對于細顆粒為主的火山碎屑物土壤樣品,以粉粒和黏粒含量變化更大;建議火山碎屑物發(fā)育土壤的顆粒分散采用(NaPO_3)_6-超聲波聯(lián)合分散法,超聲條件設定為:頻率40kHz,功率140w,震蕩時間25min。
[Abstract]:Using 40kHz ultrasonic cleaning machine, different ultrasonic power and time were designed to disperse the pyroclastic soil, and then the soil particle content was determined by wet sieve and suction method. The results were analyzed. The results showed that increasing ultrasonic power could promote the dispersion of soil particles, but the content of soil particles caused by ultrasonic power of 80w and 140w had little change. Prolonging ultrasonic time had a significant effect on the dispersion of pyroclastic soil, and had little change for the coarse grained samples, but for fine grained pyroclastic soil samples. It is suggested that the particle dispersion of pyroclastic soil should be carried out by NaPO3tip-6-ultrasonic combined dispersion method. The ultrasonic conditions are as follows: frequency 40 kHz, power 140 ws, oscillating time 25 min.
【作者單位】： 沈陽農(nóng)業(yè)大學土地與環(huán)境學院;
【基金】：國家自然科學基金項目(41171172) 科技部國家科技基礎性工作專項(2008FY110600)資助
【分類號】：S151.92
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本文編號：1649572