Effects of temperature, water content and pH on degradation of Cry1Ab protein released from Bt corn straw in soil

► Cry1Ab protein released from two Bt corn straw was degraded in a similar way. ► Cry1Ab protein degraded rapidly in early stage but slowly in middle and late stage. ► Degradation dynamics of Cry1Ab protein can be well estimated by shift-log model. ► Soil temperature affects degradation of Cry1Ab protein, but water content and pH do not.