CHANGES IN SOIL ORGANIC-MATTER WITH CROPPING AS MEASURED BY ORGANIC-CARBON FRACTIONS AND C-13 NATURAL ISOTOPE ABUNDANCE
CHANGES IN SOIL ORGANIC-MATTER WITH CROPPING AS MEASURED BY ORGANIC-CARBON FRACTIONS AND C-13 NATURAL ISOTOPE ABUNDANCE
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DOI：
10.1007/bf00025067
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发表时间：
1993-10-01
期刊：
影响因子：
4.9
通讯作者：
STRONG, WM
中科院分区：
文献类型：
--
作者：
LEFROY, RDB;BLAIR, GJ;STRONG, WM
土壤有机质随种植而下降是影响种植制度可持续性的一个主要因素。总碳水平的变化作为可持续性措施相对不敏感。用不同强度的KMnO4氧化已被证明是一个更敏感的变化指标。333mM KMnO4氧化的土壤C组分的相对大小随着种植而下降，而未氧化组分的相对大小则增加。δ（13）C比率的变化已被用来衡量包括C3和C4物种的系统中的C周转。
The decline in soil organic matter with cropping is a major factor affecting the sustainability of cropping systems. Changes in total C levels are relatively insensitive as a sustainability measure. Oxidation with different strength KMnO4 has been shown to be a more sensitive indicator of change. The relative size of soil C fractions oxidised by 333mM KMnO4 declined with cropping, whilst the relative size of the unoxidised fraction increased. Changes in delta(13)C ratio have been used to measure C turnover in systems which include C3 and C4 species.