[Dynamics of microbial biomass P and its affecting factors in a long-term fertilized black soil].
This paper studied the microbial biomass P in a long-term fertilized black soil. The soil was fertilized by farmyard manure (M2, M4) and chemical fertilizer (NPK), and the dynamics of soil microbial biomass P was monitored during crop growth season. The results showed that the microbial biomass P in different treatments was 8.75-47.68 mg x kg(-1) (M4), 3.02-37.16 mg x kg(-1) (M2), 1.59-10.62 mg x kg(-1) (NPK), and 0.76-6.74 mg x kg(-1) (CK). The microbial biomass P in M4 and M2 was the highest at reproductive growth stage, and that in NPK and CK was the highest at early growth stage. The significant difference of soil microbial biomass P induced by different amounts and types of fertilizer application was not varied with the period and stage of plant growth. In all treatments, no significant correlation was found between the dynamics of soil microbial biomass P and the soil biological, physical and chemical properties in plant growth period. Soil microbial biomass P had a very significant positive correlation with soil biological, physical and chemical properties (expect K), and a significant positive correlation with the N, P and K contents of plants and soil water content.
Li
Dongpo
D
Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China. li dp 1964@sohu.Com
Wu
Zhijie
Z
Chen
Lijun
L
Zhu
Ping
P
Ren
Jun
J
Liang
Chenghua
C
Peng
Chang
C
Gao
Hongjun
H
D002681:China; D018556:Crops, Agricultural / Q000254:growth & development; D017753:Ecosystem; D005308:Fertilizers; D010758:Phosphorus / Q000032:analysis* / Q000378:metabolism*; D012987:Soil / Q000032:analysis*; D012988:Soil Microbiology; D013997:Time Factors
D005308:Fertilizers; D012987:Soil; D010758:Phosphorus