摘要
用数值方法,分析了直立和平伸两种株型结构在冠层光分布、光合作用分布、冠层光合作用速率、光合作用日变化和光合日总量等方面的差异。指出叶面积指数越大、太阳辐射越强、太阳高度角越大(在纬度越低的地区或赤纬越高的季节),把一般株型改造成直立株型的增产潜力越大。对于叶片光合效能较高的区域、季节或品种,直立株型的增产潜力也较大。植株由一组具有各种倾斜角的叶片组成。理想株型的叶片分布函数随上述环境的和生理的因素而改变。作物株型与冠层光合作用的数学模型,为株型理论在作物栽培、育种中的应用提供了定量程度更高的、分辨力更强的计算方法。
By taking account of light and photosynthesis distribution in a crop canopy,
the differencies in photosynthesis rate and the diurnal variation of photosynthesis between
canopies in planophile and erectophile leaves are analyzed by numerical methods. High solar ele
vation or direct solar radiation within certain range, or high LAI and leaf photosynthetical effen-
ciency under a place and/or seasons are conditions under which erectophiles are more productive
than planophiles and the extent of advantages have been computed for a given latitude and sea
son. The programe can be applied to any latitude and season. The leaf area distribution function
in ideotype plant is determined by environmental and physiological factors montioned above. The
programs developed can be used to assess the advantages of any ideotype under any given latitude
and season, and therefore can be used for crop breeders, either to evaluate the cultivars obtained
or to give objectives of crop breeding.
出处
《作物学报》
CAS
CSCD
北大核心
1998年第3期272-279,共8页
Acta Agronomica Sinica
基金
国家攀登计划项目
