Influence of chemical and biological properties under long-term applying organic manure and chemical fertilizers on fluvo-aquic soils

The influence of chemical and biological properties under long-term applying organic manure and chemical fertilizers on fluvo-aquic soils is studied.The results show that both organic manure and chemical fertilizers increase soil fertility,cation exchange capacity,exchangeable base,amount of microbe,microbial biomass C and enzyme activity,but organic manure is obviously superior to chemical fertilizer in improving soil chemical and biological characteristics.