共 36 条
[31]
Smith O. L., 1982, SOIL MICROBIOLOGY MO
[32]
Stevenson F. J., 1982, Methods of soil analysis. Part 2. Chemical and microbiological properties, P625
[33]
STEVENSON FJ, 1982, HUMUS CHEM, P31
[36]
1975, STANDARD METHODS EXA, P620