CHANGES IN SOIL ORGANIC-MATTER WITH CROPPING AS MEASURED BY ORGANIC-CARBON FRACTIONS AND C-13 NATURAL ISOTOPE ABUNDANCE

被引：138
|
作者：
LEFROY, RDB [1 ]
BLAIR, GJ [1 ]
STRONG, WM [1 ]
机构：
[1] QUEENSLAND WHEAT RES INST, TOOWOOMBA, QLD 4350, AUSTRALIA
来源：
PLANT AND SOIL | 1993年 / 155卷
关键词：
C-13; CROPPING SYSTEMS; DELTA-C-13; KMNO(4); OXIDATION; SOIL ORGANIC MATTER;
D O I：
10.1007/BF00025067
中图分类号：
S3 [农学（农艺学）];
学科分类号：
0901 ;
摘要：
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.
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页码：399 / 402
页数：4
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