[Effects of long-term fertilization on soil microorganism and its role in adjusting and controlling soil fertility].
To clarify the relationships between soil microorganisms and soil fertility under the condition of long-term fertilization, a 12-year fertilization experiment was installed on a fluvo-aquic soil, and the amount of soil microorganisms and the content of soil nutrients were determined and analyzed. The results showed that chemical fertilizers combined with organic manure could significantly improve soil fertility and increase the amount of soil microorganisms. Organic manure was obviously superior to corn straw in improving soil fertility. The correlation between soil microorganisms and soil fertility was significant. A positive correlation was found between the amount of bacteria and azotobacteria and the contents of organic matter, total N, alkalified N, total P and available P. The relationship between the amount of fungi and actinomycetes and the content of soil nutrients was not obvious.
Sun
Ruilian
R
Key Laboratory of Terrestrial Ecological Progress, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China. sunning527@163.com
Zhu
Lusheng
L
Zhao
Bingqiang
B
Zhou
Qixing
Q
Xu
Jing
J
Zhang
Fudao
F
D039903:Actinobacteria / Q000254:growth & development; D001395:Azotobacter / Q000254:growth & development*; D015169:Colony Count, Microbial; D017753:Ecosystem; D005308:Fertilizers; D005658:Fungi / Q000254:growth & development*; D009584:Nitrogen / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D012987:Soil / Q000032:analysis*; D012988:Soil Microbiology; D013997:Time Factors
D005308:Fertilizers; D012987:Soil; D010758:Phosphorus; D009584:Nitrogen