| 不同时期形成的铁质富铝土特性及其在发生上的意义 |
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| 引用本文： | 史学正,龚子同,李庆逵.不同时期形成的铁质富铝土特性及其在发生上的意义[J].土壤学报,1987,24(2):170-179. |
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| 作者姓名： | 史学正 龚子同 李庆逵 |
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| 作者单位： | 中国科学院南京土壤研究所;中国科学院南京土壤研究所;中国科学院南京土壤研究所 |
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| 摘 要： | 本文在其他成土因素相对一致的前提下研究时间因素对土壤性状的影响,并以此为依据探讨分类中的一些问题.随成土时间变长(Q4-Q1),土壤的微形态特征,化学性质和粘土矿物组成都发生较大变化.如原生矿物含量减少;三水铝石逐渐增多;高岭石结晶程度变高;粘粒硅铝率和交换量分别由1.91、57.5减至1.25、12.9;游离铁含量增加.分析资料的统计结果表明:成土时间对土壤性状的影响一般小于生物气候的影响;全新世火山灰发育的土壤的粘土矿物、交换量、游离铁含量等性状与红壤截然不同,不应归属于红壤而应在高级分类单元中加以区分;许多在发生上有意义的指标,如硅铝率等,由时间因素引起的变化(Q3-Q1)已超过了同一母质发育的不同土类间的变化,因此把Q3-Q1玄武岩发育的高富铝土归属于同一土属也是不妥的.
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THE CHRACTERISTICS OF FERRIC ALLITIC SOILS OF DIFFERENT AGE AND THEIR SIGNIFICANCE IN PEDOGENESIS |
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| Shi Xuezheng,Gong Zitong and Li Chingkwei.THE CHRACTERISTICS OF FERRIC ALLITIC SOILS OF DIFFERENT AGE AND THEIR SIGNIFICANCE IN PEDOGENESIS[J].Acta Pedologica Sinica,1987,24(2):170-179. |
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| Authors: | Shi Xuezheng Gong Zitong and Li Chingkwei |
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| Institution: | Instituse of Soil Science, Academia Sinica, Nanjing;Instituse of Soil Science, Academia Sinica, Nanjing;Instituse of Soil Science, Academia Sinica, Nanjing |
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| Abstract: | Chemical,mineralogical and micro-morphological properties of ferric allitic soils derived from basalts of different age in Leiahou Penisula and Hainan Island were studied.The results showed that,with the lapse of soil of forming age (Q4-Q1),primary minerals was getting less,the crystalinity of kaolinite became better,CEC deceased obviously,and so did the SiO2/Al2O3,ratio of clay from Q3 to Q1,dithionitecitrate-extractable iron content increased gradually. |
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