云南地理环境研究
雲南地理環境研究
운남지리배경연구
YUNNAN GEOGRAPHIC ENVIRONMENT RESEARCH
2012年
5期
86-91
,共6页
红色石灰土%pH值%磁化率
紅色石灰土%pH值%磁化率
홍색석회토%pH치%자화솔
red limestone soil%pH value%magnetic susceptibility
土壤磁性变化机制的研究中，越来越多的证据指示成壤作用的影响，而土壤理化性质是其分类的主要因素，却很少有关于土壤理化性质与磁化率关系的研究报道。通过对碳酸盐岩上覆红色石灰土的酸碱处理实验，探究土壤pH值与其磁化率的影响。研究结果表明：酸碱处理前，红色石灰土的磁化率集中在3000～4500×10m^3／kg，pH值在7～8，为碱性土壤；经HCI溶液处理后，pH值下降到1～4，磁化率下降到250—4000×10^-8m^3／kg，pH值与磁化率呈现正相关关系；经NaOH溶液处理后，pH值上升到8～13，磁化率反而下降到2500-4000×10^-8m^3／kg，pH值与磁化率呈现负相关关系。上述现象的产生，与酸和强碱所分别带来的还原和氧化环境有关，改变了弱磁性矿物和强磁性矿物之间的转化方向，抑制了趋磁细菌作用，最终引起土壤磁化率的变化。
土壤磁性變化機製的研究中，越來越多的證據指示成壤作用的影響，而土壤理化性質是其分類的主要因素，卻很少有關于土壤理化性質與磁化率關繫的研究報道。通過對碳痠鹽巖上覆紅色石灰土的痠堿處理實驗，探究土壤pH值與其磁化率的影響。研究結果錶明：痠堿處理前，紅色石灰土的磁化率集中在3000～4500×10m^3／kg，pH值在7～8，為堿性土壤；經HCI溶液處理後，pH值下降到1～4，磁化率下降到250—4000×10^-8m^3／kg，pH值與磁化率呈現正相關關繫；經NaOH溶液處理後，pH值上升到8～13，磁化率反而下降到2500-4000×10^-8m^3／kg，pH值與磁化率呈現負相關關繫。上述現象的產生，與痠和彊堿所分彆帶來的還原和氧化環境有關，改變瞭弱磁性礦物和彊磁性礦物之間的轉化方嚮，抑製瞭趨磁細菌作用，最終引起土壤磁化率的變化。
토양자성변화궤제적연구중，월래월다적증거지시성양작용적영향，이토양이화성질시기분류적주요인소，각흔소유관우토양이화성질여자화솔관계적연구보도。통과대탄산염암상복홍색석회토적산감처리실험，탐구토양pH치여기자화솔적영향。연구결과표명：산감처리전，홍색석회토적자화솔집중재3000～4500×10m^3／kg，pH치재7～8，위감성토양；경HCI용액처리후，pH치하강도1～4，자화솔하강도250—4000×10^-8m^3／kg，pH치여자화솔정현정상관관계；경NaOH용액처리후，pH치상승도8～13，자화솔반이하강도2500-4000×10^-8m^3／kg，pH치여자화솔정현부상관관계。상술현상적산생，여산화강감소분별대래적환원화양화배경유관，개변료약자성광물화강자성광물지간적전화방향，억제료추자세균작용，최종인기토양자화솔적변화。
About the research of soil magnetic change mechanism, more and more evidences indicate the impact of pedogenesis. The physical and chemical properties of soil decided soil classification, rarely reported on he relationship between soil properties and magnetic susceptibility. Based on studied the red limestone soil Acid - Alkali disposed, try to analysis the relationship between soil pH and the Magnetic susceptibility. Our result indicate that the magnetic susceptibility of the soils changes from 3 000 -4 500 × 10^ -8m^3/kg before disposing and the pH value of the soil stays from 7 -8, belongs to alkaline soil. After disposing the soil samples with HCl, the magnetic susceptibility changes from 250 -4 000 × 10^-8m^3/kg and the pH value drops tol -4, the pH value and the magmefic susceptibility are positive correlation. After disposing the soil samples with NaOH, the magnetic susceptibility changes form 2 500 - 4 000 × 10^-8m^3/kg and the pH value rises to 8 - 13, the pH value and the magnetic susceptibility are negative correlation. The primary cause of the above phenomenon, Strong acid and alkali were brought to reduction and oxidation environment, changed the transformed direction between the weakly magnetic minerals and strong magnetic minerals, inhibited magnetic bacterial action, ultimately affect the changes of soil magnetic susceptibility.
