水土保持通报2012，Vol.32Issue(1)：66-70,5.
苗期红豆草光合速率日变化及其影响因子分析
Daily Variation of Photosynthetic Rate and Its Influence Factors on Onobrychis Viciaefolia Seedlings
摘要
Abstract
In order to investigate the photosynthetic characteristics of Onobrychis viciaefolia seedlings and the main environmental factors directly influencing photosynthesis of the seedlings,the photosynthetic characteristics of Onobrychis viciaefolia seedlings and the diurnal variations of the factors were measured using Li-6400 photosynthesis system by a pot experiment.Meanwhile,the effects of the factors on photosynthetic rate（Pn） were analyzed using correlation analysis and stepwise multi-regression analysis.Results showed that the diurnal variation of the Pn presented a feature of single peak curve with its peak value appearing at 12：00 am,about 27.63 μmol/（m2·s）.The daily average Pn over the observation time was calculated to be 22.33 μmol/（m2·s）.Besides,according to correlation analysis,photosynthetically active radiation（PAR） was found to be the main environmental factor directly influencing the daily Pn of Onobrychis viciaefolia seedlings and the PAR had a highly significant positive correlation with the Pn.关键词
红豆草/苗期/光合速率/逐步多元回归分析Key words
Onobrychis viciaefolia/seedling/photosynthetic rate/stepwise multi-regression analysis分类
农业科技引用本文复制引用
俞靓,程积民,万惠娥..苗期红豆草光合速率日变化及其影响因子分析[J].水土保持通报,2012,32(1):66-70,5.基金项目
农业部现代农业产业技术体系建设专项资金资助“咸阳牧草试验站牧草栽培试验” （）
中国科学院重要方向“半干旱黄土区植被自然恢复过程及适度利用研究” （）
国家自然科学基金重点项目“西北典型区域基于水分管理的森林植被承载力研究” （）
