摘要
在西藏高原田间的测定表明,高原冬小麦光-光合速率响应曲线符合直角双曲线函数,其表观初始光能利用效率α平均为0.034μmolCO2/m2s(μmolphotons/m2s),只及内陆平原地区的约2/3。高原地区空气稀薄,CO2密度为平原地区的2/3左右,致使小麦叶片光能利用效率降低。
From practical measurement and calculation of the net photosynthetic rate of flag leaf of winter wheat in the field in Tibet Plateau, we got following the results. The light photosynthetic curve of flag leaf of winter wheat in Tibet Plateau approximates to a right angle hyperbola. Apparent quantum yield (AQY) was measured as 0 034μmolCO 2/m 2 s(μmol photons/m 2 s) and it was about two thirds of that in the east plain of China. The air is thin in Tibet Plateau, and the density of carbon dioxide is about two thirds of that in the east plain of China. These are the causes of low apparent quantum yield.
出处
《生态学报》
CAS
CSCD
北大核心
2000年第1期35-38,共4页
Acta Ecologica Sinica
基金
国家自然科学基金!4 94 71 0 1 4
国家重点基础研究发展规划项目!G1 9980 4 0 80 0
中国科学院青藏高原研究项目!KZ95 1 -A1 -2 0 4
KZ
