Effects of Different Film Mulching Treatments on Vertical Canopy Structures of Super-high Yield Colony of Spring Maize

Canopy vertical structure and yield of super-high yield colony of spring maize in different film mulching treatments were studied.The treatment of covering film on the furrows made that the functional period of leaves of super-high yield spring maize was longer,LAI and LAD increase,the photosynthesis rate and the content of chlorophylls of super-high yield plants was higher respectively,the light distribution in super-high yield colony was more uniform and reasonable,so more IPAR was intercepted by canopy of super-high yield colony,transm ittance raise,so avoiding the bottom leaf to decline,raising light to match an ability,acquiring a larger yield.The functional period of leaves,LAI,LAD,the photosynthesis rate,IPAR and ittance raise of every layer in canopy vertical structure of super-high yield colony in spring maize in different film mulching treatments were in sequence of covering film be-tween furrows covering film on furrows bare land,which regularity accord with the effect of every treatment on yield.