1College of Resource and Environment Sciences，China Agricultural University，Beijing 100193，China|2Institute of Agriculture Resource and Environment，Hebei Academy of Agricultural and Forestry Sciences，Shijiazhuang 050051，Hebei，China
Abstract：Using In-situ method of micro-lysimeter the characteristics of manure N mineralization was investigated with different rate of chicken manure，straw mixed with chicken manure，compost with/without crop planting at incubation prophase．The results showed that there were obvious differences in the N mineralization amount and mineralization coefficient among different treatments．Before planting crops，the N mineralization coefficient ranged from -1.17% to 2.67%．The amount of leached N，mineralized N amount and N mineralization coefficient in high rate of chicken manure treatment was significantly higher than those in the treatments of different compost product．Crop planting significantly stimulated N mineralization．Its mineralization coefficient was 3.45% to 53.22%．The N mineralization amount increased with the increase of chicken manure amount in chicken manure treatment．The mineralized N in high rate of chicken manure treatment was significantly higher than those of chicken manure mixed with straw treatment，low rate of chicken manure treatment，and compost treatment．The coefficient of manure N mineralization in the treatment with high rate of chicken manure after planting crop was 50.55 percentage point higher．
