diurnallyadv.天天(只在白天)diurnaladj.每日的；白天的diurnal photosynthesis courses日变化diurnal photosynthetic capacity日光合量Diurnal change of photosynthesis光合日进程diurnal photosynthesis variation日变化diurnal variation characteristics日变化特征diurnal pattern of photosynthesis光合日进程diurnal courses of photosynthesis光合日进程diurnal variation of photosynthesis光合日变化diurnal dynamics of soil respiration土壤呼吸日动态diurnal variation of soil temperature土壤温度日变化