Physicochemical properties of three typical purple soils with different parent materials and land uses in Sichuan Basin, China | |
Xiao, Yi1; Tang, Jialiang1; Wang, Mingkuang2 | |
刊名 | Natural Resources & Engineering |
2016-12-25 | |
卷号 | 1期号:2页码:59-68 |
关键词 | Clay Minerals Fe-oxides Land Use Type Purple Soil |
ISSN号 | 2380-2693 |
DOI | 10.1080/23802693.2016.1258854 |
通讯作者 | 唐家良 |
英文摘要 |
Mainly located in the Sichuan Basin, known as the ‘Land of Plenty’, purple soils (developed from purple sandstone and shale) have been long noted as highly productive in spite of their rocky texture. However, information on the physicochemical properties (including mineral properties) of purple soils remained obscure for the scientific community. For example, it is not clear what causes the purple color of the soils. In this study, eight soil profiles of the Jiufeng (JF, acidic), Shibao (SB, neutral), and Yanting (YT, calcareous) areas, representing the three most widely distributed purple soils in Sichuan Basin, were individually sampled under both cropland and forestland, and then analyzed using common chemical analysis and conventional X-ray diffraction to clarify the effects of
clay mineral and anthropogenic influences on the typical soils. The results show that considerable variability of soil pH and cation-exchange capacity (CEC) exists between soil types (p < 0.05). Organic matter, total nitrogen, and CEC of forestland are higher than those of farmland, while farmland has a higher content of Olsen-P, indicating significant farming effects on nutrient status. Acidic and neutral purple soils had higher total P contents than calcareous soils while calcareous soils had higher TN, clay, and CaCO 3 contents. OM, TN, TP, and Olsen-P decreased with soil depth both in farmland and forestland soil profiles. Vertical distribution of organic-bound Fe-oxides (Fep) and clay
particles also shows the anthropogenic interference on farmland. Illite, chlorite, kaolinite, goethite, and trace amounts of an illite–chlorite mixing layer in clay fractions were identified for typical purple soils. Hematite was observed in the coarser fractions of the calcareous pedons, confirming that the purple soil color was mainly derived from the parent rocks. Understanding of the physicochemical properties and mineral species of soil profiles can shed light on the sustainable uses of typical purple
soils in subtropical area. |
学科主题 | 土壤学 |
语种 | 英语 |
内容类型 | 期刊论文 |
源URL | [http://ir.imde.ac.cn/handle/131551/20683] |
专题 | 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
作者单位 | 1.institute of Mountain Hazards and environment, chinese academy of sciences 2.Department of agricultural chemistry, National taiwan university, taipei, taiwan |
推荐引用方式 GB/T 7714 | Xiao, Yi,Tang, Jialiang,Wang, Mingkuang. Physicochemical properties of three typical purple soils with different parent materials and land uses in Sichuan Basin, China[J]. Natural Resources & Engineering,2016,1(2):59-68. |
APA | Xiao, Yi,Tang, Jialiang,&Wang, Mingkuang.(2016).Physicochemical properties of three typical purple soils with different parent materials and land uses in Sichuan Basin, China.Natural Resources & Engineering,1(2),59-68. |
MLA | Xiao, Yi,et al."Physicochemical properties of three typical purple soils with different parent materials and land uses in Sichuan Basin, China".Natural Resources & Engineering 1.2(2016):59-68. |
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