不同类型植物净光合速率的日变化及其对光合有效辐射响应数学模型研究

以金银花、马铃薯和苎麻为材料,研究了药材植物、粮蔬兼用植物和纤维类经济植物的净光合速率日变化情况及其对光合有效辐射响应的数学模型.结果表明:金银花、马铃薯和苎麻3种植物的净光合速率日变化曲线呈双峰型.且均为第1个峰持续时间较短、第2个峰持续时间很长,净光合速率日变化趋势第1个峰期间金银花与苎麻比较一致,而第2个峰期间马铃薯与苎麻比较一致;此外,3种植物的净光合速率对光合有效辐射的响应可用对数、线性、二项式等数学函数来描述,但以二项式描述更确切,依据各供试植物的二项式方程计算出光饱和点金银花为1 086.3 μmol/m2·s、马铃薯为1 160 μmol/m2·s、苎麻为1 141 μmol/m2·s.

Diurnal changes of net photosynthetic rate (NPR) in leaves of different plants and the responding mathematical model of NPR to photosynthetic valid radiation

The diurnal changes of net photosynthetic rate(NPR) in leaves and the responding mathematical model of NPR to photosynthetic valid radiation was researched by means of Lonicera japonica Thunb.,Solanum tuberosum,and Boehmeria nivea L.Gaudich standing for one of Chinese herb medicine plants,food and vegetable dual-purpose plants and fiber like economic plants respectively.Results showed that the diurnal changes curves of NPR of three plants presented double peaks,and as for the sustaining time of the two peak...