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镁与急性心肌梗塞
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作者 魏登勤 李传宝 梁衍舜 《菏泽医学专科学校学报》 2001年第1期90-93,共4页
关键词 镁/生理学 镁/治疗应用 急性心肌梗塞/病理 急性心肌梗塞/治疗
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Pedogenic and Anthropogenic Influence on Calcium and Magnesium Behaviors in Stagnic Anthrosols 被引量:20
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作者 JIANGYong ZHANGYu-Ge +1 位作者 LIANGWen-Ju LIQi 《Pedosphere》 SCIE CAS CSCD 2005年第3期341-346,共6页
The formation of Stagnic Anthrosols is closely related to rice planting and parent materials. Six representative pedons, two from each of three Stagnic Anthrosol subgroups, Vertic Haplic-, Vertic Gleyic-, and Sulfic G... The formation of Stagnic Anthrosols is closely related to rice planting and parent materials. Six representative pedons, two from each of three Stagnic Anthrosol subgroups, Vertic Haplic-, Vertic Gleyic-, and Sulfic Gleyic-Stagnic Anthrosols, from different parent materials and soil formation processes, from Liaoning Province, China, were selected and used along with additional supporting data to assess the potential impact in each soil subgroup combination of both pedogenic and anthropogenic factors on the migration and geochemical characteristics of calcium (Ca) and magnesium (Mg) and their relations to soil particle-size composition. Results revealed that exchangeable Mg was correlated positively with clay and silt content, but negatively with sand content, suggesting that clay and silt could retain more exchangeable Mg than sand. Also, in the six pedons exchangeable Ca/Mg ratios generally decreased with depth, which was most likely due to the preferential retention of Mg below the Apl horizon and the effects of bio-cycling in rice-soil systems. The pedons with high pH had smaller exchangeable Ca/Mg ratios than those with low pH. Thus, it was concluded that exchangeable Ca/Mg ratios could be helpful in classification of Stagnic Anthrosols. 展开更多
关键词 anthropogenesis CALCIUM MAGNESIUM PEDOGENESIS Stagnic Anthrosols
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