[Dynamics of microbial biomass C in a black soil under long-term fertilization and related affecting factors].
The effect of long-term fertilization on the dynamics of microbial biomass C in a typical black soil of Northeastern China was studied in a field trail treated by different fertilizations. The results showed that the amount of soil microbial biomass C under different fertilizations varied significantly with growth stages. It was the highest in farmyard manure (M2 and M4) treatments, with a less seasonal fluctuation, second in NPK treatment, the peak at sowing period, and the lowest in CK, the peak at wax maturity stage. No significant correlation was found between the dynamic changes of soil microbial biomass C and soil biological, physical and chemical properties in all treatments, but the correlation of soil microbial biomass C with the contents of N, P and K in plants and that of crude protein in grain was significantly positive.
Li
Dongpo
D
Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang. lidp1964@sohu.com
Wu
Zhijie
Z
Chen
Lijun
L
Zhu
Ping
P
Ren
Jun
J
Peng
Chang
C
Liang
Chenghua
C
D002244:Carbon / Q000032:analysis*; D015169:Colony Count, Microbial; D018556:Crops, Agricultural / Q000254:growth & development*; D005308:Fertilizers / Q000009:adverse effects; D012987:Soil / Q000032:analysis*; D012988:Soil Microbiology
D005308:Fertilizers; D012987:Soil; D002244:Carbon