Root respiration in winter wheat fields in North China contributes significantly to total soil respiration. Researchers measured soil respiration rates during the growing season in 2008 and found that root respiration varied seasonally, peaking during the flowering period of winter wheat. The study estimated that root respiration makes up around 32% to 45% of total soil respiration, with different methods yielding slightly different results. Soil temperature at 5-10cm depth was found to influence soil respiration, with a Q10 value of 1.4-1.6. Overall, root respiration plays a crucial role in the carbon cycle of winter wheat fields in North China.