| A field plot experiment was conducted to study the water soil organic carbon（WSOC） dynamics with the growth of wheat under different fertilization treatments including no fertilizer（CK）, chemical fertilizer only（NPK）, chicken manure（M）, organic-inorganic compound fertilizer based on chicken manure（NPKM1） and pig manure（NPKM2）. The results indicated that the cold water soil organic carbon（CWSOC） and hot water soil organic carbon（HWSOC） concentrations of all treatments increased firstly and decreased subsequently and finally increased with the changes of the growth stage at topsoil（0~20 cm）. Their concentrations under NPKM1 and NPKM2 treatments were significantly higher than CK and NPK treatments（P<0.05）, but lower than the M treatment. The CWSOC and HWSOC concentrations in 20~40 cm soil layer presented a single-peak curve with the changes of the growth stage which the peak appeared at heading stage, and the order from high to low was similar to the topsoil. In addition, the correlation of the two kinds of WSOC with wheat yield and soil nutrients was higher than soil total organic carbon at topsoil. |
