论文部分内容阅读
交叉偏振~(13)C核磁共振光谱在阐明土壤有机质的本质及其对植被和土壤形成过程中的关系中,提供了相当可观的视界,它克服了质子扩散的偶极线问题,基本上能定量地测定土壤芳香族化合物含量。M.A.Wilson等用~(13)C核磁共振(n.m.r)交叉偏振(c.p.)谱测定了新西兰7种土壤。结果表明:母岩和植被相同的土壤,其芳香族化合物含量不同。年轻的土壤(300年)芳香族化合物含量高;而古老的土壤(22,000年)脂肪族化合物含量高。腐殖质形成较慢似乎更有利于多脂肪腐殖质的生成,而不利于芳香族腐殖质。
The cross-polarized ~ (13) C nuclear magnetic resonance spectroscopy provides a considerable horizon in elucidating the nature of soil organic matter and its relationship to vegetation and soil formation, overcoming the proton-diffusion dipole problem and essentially Quantitative determination of soil aromatics content. M.A. Wilson et al. Determined seven soil types in New Zealand using ~ (13) C nuclear magnetic resonance (n.m.r) cross-polarization (c.p.) spectra. The results show that: the mother rock and vegetation the same soil, the aromatic content of different. Young soils (300 years) contain high levels of aromatics; whereas older soils (22,000 years) have high levels of aliphatics. The slower formation of humus seems more conducive to the formation of multi-fat humus, but not conducive to aromatic humus.