摘要
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1 086.3μmol/m2.s、马铃薯为1 160μmol/m2.s、苎麻为1 141μmol/m2.s。
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., Solarium 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 peaks, the former was shorter than the later. From the angle of the diurnal change tendency of NPR, Lonicerajaponica Thunb. was comparatively accordance with Boehmeria nivea L. Gaudich in the former peak time, but Solanum tuberosum was relatively accordance with Boehmeria nivea L. Gaudich during the later peak. The responding mathematical model of NPR of the three plants to photosynthetic valid radiation could be all described by three mathematic functions, i.e. logarithm, linearity and binomial. Of the three, binomial function was more precise to present the interrelationship above than the others. Light saturation points of thee plants were figured out by means of derivation to each binomial equation deduced in this study, i.e. Lonicerajaponica Thunb. 1 086.3 μmol/m^2·s, Solanum tuberosum 1 160 μmol/m^2·s, Boehmeria nivea L. Gaudich. 1 141 μmol/m^2·s.
出处
《广东农业科学》
CAS
CSCD
北大核心
2009年第6期31-34,共4页
Guangdong Agricultural Sciences
基金
河南科技学院高层次人才引进项目(7004)
河南省教育厅自然科学基础研究项目(2009B210008)
关键词
净光合速率
日变化
光合有效辐射
数学模型
net photosynthetic rate
diurnal changes
photosynthetic valid radiation
mathematical model
