摘要
碳酸盐检测是土壤科学中的常规检测。在本研究中,用中红外光谱方法对采自奥地利130多个不同的森林区域的大量土壤样品进行评价。评价了有机层中的20条谱带和矿物土壤中15条谱带区域,并且通过模型计算检测了被调查土壤样品中的碳酸盐。对于有机层的所有样品,相关系数都很低(R2=0.68),可以通过对F(中度分解的有机物)和H(高度腐烂的有机物质)的混合样品进行组分离来增加相关系数。FH层土壤、森林类型土壤、矿质土壤母质的相关系数达到R2=0.92。对于所有0到5和5至10cm的矿质土壤层,相关系数从一开始就很高(R2=0.97),当隔离一组石灰岩作为母质的10个样品时,相关系数可以增加到R2=0.99。最后,本研究着重介绍了土壤样品的化学多样性对于中红外光谱检测土壤中碳酸盐的影响潜力。
Determinations of carbonate are routine measurements in soil science.In the present study,a large set of soil samples was evaluated with mid-infrared spectroscopy for testing this approach on a very diverse set of forest soil samples from more than 130 forest soil sites in Austria.Band areas of 20 bands from the organic layers and 15 bands from mineral soils were evaluated,and models were calculated for determinations of carbonate in the investigated soil samples.For all organic layers,the correlation was quite low for all samples（R2 = 0.68）,but could be increased by separating groups of mixed samples of F（intermediate decomposed organic matter） and H（highly decomposed organic matter）,the FH layers,forest types,and parent material of mineral soils underneath to an R2 of 0.92.For all upper mineral soil layers from 0 to 5 and 5 to 10 cm,the correlation was high from the beginning（R2 = 0.97）,but could be increased to R2 = 0.99 when isolating a group of 10 samples having limestone as the parent material.Finally,this study underlines the potential of mid-infrared spectroscopy for carbonate determinations in soils by considering the chemical diversity in the investigated soil samples.
出处
《生命科学仪器》
2011年第5期26-29,共4页
Life Science Instruments
