摘要
在不同覆膜方式下对春玉米超高产田的冠层垂直结构与产量进行了系统研究。结果表明:行间覆膜可使春玉米超高产群体的植株叶片功能期延长、LAI和LAD增大、Pn和叶绿素提高,冠层内光分布均匀合理,能截获更多的光合有效辐射量,透光率增大,避免下层叶片早衰,提高光合能力,获得更大产量。不同覆膜处理在冠层各层中对叶片功能期、LAI、LAD、Pn、光合有效辐射量及透光率均表现为行间覆膜>行上覆膜>不覆膜,这一规律与各处理对产量的影响一致。
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, transmittance 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 between furrows 〉 covering film on furrows 〉 bare land, which regularity accord with the effect of every treatment on yield.
出处
《玉米科学》
CAS
CSCD
北大核心
2009年第6期63-67,73,共6页
Journal of Maize Sciences
基金
国家自然科学基金(30660083)
国家重点基础研究发展计划项目(2009CB118601)
北京农业育种基础研究创新平台项目
关键词
春玉米
超高产
冠层结构
覆膜方式
Spring maize
Super-high yield
Vertical canopy structure
Covering film between furrows
