澎湖紅棕壤之化育的研究

Soil Development Study op the Reddish Brown Lateritic Soils in Penghu Hsien, Taiwan, China

梁鉅榮(K. L. Leung) ； 黎靜韻(C. Y. Lai)

《中華農業研究》 14卷1期 (1965/03) Pp. 42-55

https://doi.org/10.29951/JARC.196503.0006

摘要

1. This is a clay mineral study of Hwayu clay (representative soil series) by sampling 5 lazers of the original undisturbed soil monolith, and to analysis several supplemental items of their physical and chemical properties in order to study its soil development.
2. Data from X-Ray photographies, differential thermal analysis, thermal gravimetric analysis, cation exchange capacity, free iron oxide and potash were used to characterize quantitatively the minerals in the clay fractions (＜2μ) of Hwayu clay profile.
3. Kaolinite was identified in substantial amounts about 60% of all lazers, other minerals include muscovite 19-25%, Fe2O3 9-11.5% and about 3% of gibbsite in the first or second lazer of the profile.
4. The Hwayu clay is different from the soils of Low Humic Latosols is Hawaii base on the analytical results of their morphology and clay minerals. The soils of Hwayu clay is not in the young stage of Laterization according to the content of Kaolinite and Gibbsite and is stronger than that of the other Reddish Brown Lateritic Soils in Taiwan, if we compare their Laterization.
5. It is easily to stratified the first and second lazers as accumulated horizon, the third and forth lazers as decomposed horizon, and the fifth lazer as C horizon by using Barshad's soil development study method base on the results of the supplemontal physical analysis and conform with clay mineral analysis. So it may be arrange the five lazers in order as B2, B1, A12, A11 and C also. It conforms harrassowitze's theory which distinguishes the strata of typical Laterite, Therefore, the Hwayu clay should be classified as a rather good developed Reddish Brown Lateritic Soils.

並列摘要

1. This is a clay mineral study of Hwayu clay (representative soil series) by sampling 5 lazers of the original undisturbed soil monolith, and to analysis several supplemental items of their physical and chemical properties in order to study its soil development.
2. Data from X-Ray photographies, differential thermal analysis, thermal gravimetric analysis, cation exchange capacity, free iron oxide and potash were used to characterize quantitatively the minerals in the clay fractions (＜2μ) of Hwayu clay profile.
3. Kaolinite was identified in substantial amounts about 60% of all lazers, other minerals include muscovite 19-25%, Fe2O3 9-11.5% and about 3% of gibbsite in the first or second lazer of the profile.
4. The Hwayu clay is different from the soils of Low Humic Latosols is Hawaii base on the analytical results of their morphology and clay minerals. The soils of Hwayu clay is not in the young stage of Laterization according to the content of Kaolinite and Gibbsite and is stronger than that of the other Reddish Brown Lateritic Soils in Taiwan, if we compare their Laterization.
5. It is easily to stratified the first and second lazers as accumulated horizon, the third and forth lazers as decomposed horizon, and the fifth lazer as C horizon by using Barshad's soil development study method base on the results of the supplemontal physical analysis and conform with clay mineral analysis. So it may be arrange the five lazers in order as B2, B1, A12, A11 and C also. It conforms harrassowitze's theory which distinguishes the strata of typical Laterite, Therefore, the Hwayu clay should be classified as a rather good developed Reddish Brown Lateritic Soils.