Abstract: Long-term position experiments were conducted in Hailun,Luancheng and Yingtan Agricultural Ecology Station of ChineseAcademy of Sciences together with pot experiment aimed to examine the influence of long-term fertilization on nitrogen supply capacity in different thermal zones soil.Results showed that under different long-term fertilization,the amount of total N,alkaline N and mineral N decreased in an order of NPKOM>NPK>CK.Long-term fertilization enhanced the capacity of soil nitrogen supply in different soils with an order of red soil>cinnamon soil>black soil.There was significant positive correlated relationship between the degree of long-term fertilization increased nitrogen supply capacity and the effect ively accumulated temperature (P<0.05).In addition,cropbiomass of fert ilization soil was significantly higher than no fertilization soil,and the tendency of crop biomass was the same with the tendency of soil nitrogen content.It showed that crop biomass could be chosen as index for evaluating soil nitrogen supplying capacity.

Key words: Nitrogen, Long-term fertilization, Different thermal zones, Crop biomass

CLC Number: 

• S154