植物的叶片,是进行光合作用以及形成、累积生物产量和经济产量的主要器官。一株玉米的干物质80～90%是由叶片制造的,其余10～20％是根系从土壤中吸取矿物质营养形成的。玉米果穗叶及其上下叶称为棒三叶。棒三叶的叶面积最大,功能期最长,且与籽粒形成期相吻合,具有高光效的内在基础(如叶绿素含量较高)。因此,玉米棒三叶对雌穗的生长发育及产量形成起着重要作用。 The leaves of plants are the main organs for photosynthesis and formation, bioaccumulation and economic yield. 80-90% of the dry matter of a corn plant is made from leaves and the remaining 10-20% is rooted from mineral nutrients extracted from the soil. Corn ear leaves and the upper and lower leaves called stick clover. Rod clover has the largest leaf area, the longest functional period, and coincides with the grain-forming period, with an inherent basis of high photoperiod (eg, higher chlorophyll content). Therefore, the three-leaf corn cob on the ear growth and yield formation plays an important role.