Pedosphere 4(3): 265--272, 1994
ISSN 1002-0160/CN 32-1315/P
©1994 Soil Science Society of China
Published by Elsevier B.V. and Science Press
Size of microbial biomass in soils of China
WANG Yan, SHEN Qi-Rong, YANG Zheng-Ning and YU Ling
Nanjing Agricultural Univertity, Nanjing 210095 (China)
      The microbial biomass C, N and P of soils all over China were determined in this study to study their affecting factors. The results, about 100-417 mg C kg-1 soil, 18-51 mg N kg-1 soil and 4.4-27.3 mg P kg-1 soil, showed the biomass C, N and P in linear relationship with the soil total organic C, toal N and soil organic P. The ratios of C: N and C:P, ranging from 5.6 to 9.6 and from 11.2 to 48.4 respectively, were affected by soil pH, texture, crop rotation, macroclimate, etc. The ratio of C:N in soil biomass increases gradually from the north to the south in China.
Key Words:  fumigation-extraction, C:N and C.P ratios, soil microbial biomass
Citation: Wang, Y., Shen, Q. R., Yang, Z. N. and Yu, L. 1994. Size of microbial biomass in soils of China. Pedosphere. 4(3): 265-272.
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