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.

引用

页码：399 / 402

页数：4

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