Pedosphere 8(4): 349--354, 1998
ISSN 1002-0160/CN 32-1315/P
©1998 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Relationship between soil microbial biomass C and N and mineralizable nitrogen in some arable soils on the Loess Plateau |
| ZHOU Jian-Bin and LI Sheng-Xiu |
| Department of Soil Science and Agrochemistry, Northwest Agricultural University, Yangling 712100 (China) |
| ABSTRACT |
| The chloroform fumigation-incubation method was used to measure the soil microbial biomass C (SMBC) and N (SMBN) in 16 loessial soils sampled from Ansai, Yongshou and Yangling in Shaanxi Province. The SMBC contents in the soils ranged from 75.9 to 301.0 μg C g-1 with an average of 206.1 μg C g-1, accounting for 1.36%~6.24% of the total soil organic C with an average of 3.07%, and the SMBN contents from 0.51 to 68.40 μg N g-1 with an average of 29.4 μg N g-1, accounting for 0.20%~5.65% of the total N in the soils with an average of 3.36%. A close relationship was found between SMBC and SMBN, and they both were positively correlated with total organic C, total N, NaOH hydrolizable N and mineralizable N. These results confirmed that soil microbial biomass had a comparative role in nutrient cycles of soils. |
| Key Words: carbon, mineralizable N, nitrogen, soil microbial biomass |
| Citation: Zhou, J. B. and Li, S. X. 1998. Relationship between soil microbial biomass C and N and mineralizable nitrogen in some arable soils on the Loess Plateau. Pedosphere. 8(4): 349-354. |
| |
|
View Full Text
|
|
|
|
