五个品种北美海棠的生长量与光合特性的比较
Comparison of the Growth and Photosynthetic Characteristics of North American Begonia in Five Varieties

为了探究北美海棠生长量与光合特性之间的关系，为引种和培育不同需光特性的新品种提供理论依据，以天津远大苗圃的“冬红”、“舞美”、“绚丽”、“印第安魔力”、“王族”五个生长速度不同的北美海棠品种为试材，测量了植株4项生长指标与五种海棠的光合特性，5个品种海棠胸径、地径、冠幅、新梢四个生长量指标与净光合速率、气孔导度、蒸腾速率、胞间CO₂浓度和光合有效辐射。利用隶属函数综合分析得出北美海棠的综合特性顺序为：绚丽 > 印第安魔力 > 冬红 > 王族 > 舞美。
In order to explore the relationship between the photosynthetic characteristics and growth of north American begonia, and to provide theoretical basis for the effective introduction and cultivation of new varieties of north American ornamental begonia with different light characteristics, five varieties of north American begonia with different growth rates, such as “Winter Red”, “Wumei”, “Radiant”, “Indian Magic” and “Royalty”, which were provided by Tianjin broad nursery, were used as test materials to measure the plant’s four growth indicators and the photosynthetic characteristics of five kinds of begonia. That is to say, the four growth indexes of DBH, ground diameter, crown width and new shoot were all related to net photosynthetic rate, stomatal conductance, transpiration rate, intercellular CO₂ concentration and photosynthetic effective radiation. By using the membership function, the order of comprehensive characteristics of North American begonia was as follows: Radiant > Indian Magic > Winter Red >Royalty > Wumei.