Cellulase and β-glucosidase activities in arable Mollisols with different organic matter contents under two climates

In this study,five Mollisols with different soil organic matter (SOM) contents were moved into two climate zones(MAT4.5,warmer climate; and MAT1.5,colder climate) by spatial transplanting.The effects of climate,SOM and fertilization on cellulase and β-glucosidase activities were investigated.The results showed that both warmer climate and fertilization could enhance cellulase activity; the activity decreased with the increasing SOM in the warmer climate but changed as "U" in the colder climate; while the β-glucosidase activity increased with the increasing SOM in two climate conditions and two fertilization treatments.Although fertilization could enhance β-glucosidase activity,the increasing rates were higher in the colder climate.Warmer climate also increased β-glucosidase activity,especially in the no fertilization treatment.The climate,soil organic matter contents and fertilization could significantly influence cellulase and β-glucosidase activities,however,the interactions among/between them could significantly affect the cellulase activity only.