摘要
[目的]研究构树光合特性的日变化规律及其影响因子,为构树的光合生理研究提供基础数据,也可为构树的人工栽培提供理论支持。[方法]利用Li-6400光合作用系统对构树光合速率(Pn)日变化规律进行研究。[结果]在构树处于生长初期的条件下,其日变化为双峰曲线。净光合速率与与光合有效辐射关系密切,而与大气温度、空气相对湿度相关性不大。[结论]影响构树叶片Pn日变化的主要生态因子是光合有效辐射和气孔导度。
[Objective] The research aimed to study the diurnal variation laws of photosynthesis rate of Broussonetia papyrifera and its influencing factors,so as to provide the basic data for the photosynthetic physiology research of B.papyrifera and theoretical support for the artificial cultivation of B.papyrifera.[Method] The diurnal variation laws of photosynthesis rate （Pn） of B.papyrifera were studied by Li-6400 portable photosynthesis system.[Result] The results showed that the curve of diurnal variation of net photosynthesis rate of B.papyrifera demonstrated two peaks when it was in the primary growth.The net photosynthesis rate was closely related with PAR and it had little correlation with air temperature,air relative humidity.[Conclusion] PAR and stomatal conductance were two major ecological factors that affected diurnal variations of net photosynthesis rate of B.papyrifera.
出处
《安徽农业科学》
CAS
北大核心
2010年第22期12044-12046,共3页
Journal of Anhui Agricultural Sciences
基金
中央财政林业科技推广示范资金项目([2010]JXTG-2)
国家林业局重点科研项目(2006-24)
江西省教育厅科学技术研究项目(GJJ08198)
关键词
构树
日变化
净光合速率
Broussonetia papyrifera
Diurnal variation
Net photosynthesis rate
