共 14 条
ISOTOPE AND MOLECULAR EVIDENCE FOR DIRECT INPUT OF MAIZE LEAF WAX N-ALKANES INTO CROP SOILS
被引:58
作者:
LICHTFOUSE, E
ELBISSER, B
BALESDENT, J
MARIOTTI, A
BARDOUX, G
机构:
[1] Laboratoire de Biogéochimie Isotopique, associé à l'Institut National de la Recherche Agronomique, Université Pierre et Marie Curie, 75252 Paris Cedex 05
[2] 75012 Paris, 46, Boulevard de Reuilly
关键词:
N-ALKANES;
SOIL HYDROCARBONS;
LEAF WAXES;
ZEA MAYS;
C-13 OF LEAF WAX AND SOILS;
D O I:
10.1016/0146-6380(94)90181-3
中图分类号:
P3 [地球物理学];
P59 [地球化学];
学科分类号:
0708 ;
070902 ;
摘要:
The contribution of plant carbon to crop soils can be followed by isotope labelling at natural abundance, such as growing a C-4 plant on a soil which was previously under C-3 vegetation. For this purpose, carbon isotope compositions and relative abundances of n-alkanes of maize leaf waxes and maize crop soils were compared. Isotope values of soil n-alkanes increased with time of maize cultivation as the result of maize carbon integration into soil organic matter. With increasing time of cultivation, the increase in isotopic difference between n-heptacosane (C-27) and n-nonacosane (C-29) is explained, at least partly, by a direct input of maize leaf n-alkanes. The amount of maize-derived carbon within each n-alkane has been calculated by isotopic means.
引用
收藏
页码:349 / 351
页数:3
相关论文