间作栽培模式下不同小豆品种的光合特性研究

Photosynthetic Characteristics of Different Adzuki Cultivars under Intercropping Patterns

选用5个小豆品种为试验材料,采用双因素裂区设计,研究间作栽培条件下不同小豆品种花荚期的光合特征参数及其产量经济性状变化,旨在为山西中部科学选择适应性强、光利用效率高的小豆品种提供理论依据。结果表明,花荚期阶段,在小豆/玉米间作模式下,小豆上部叶片的叶绿素含量远低于对照(无遮阴),中红10号的净光合速率(Pn)、气孔导度(Gs)和蒸腾速率(Tr)最高,中红6号次之;无遮阴条件下,各个小豆品种的Pn高于遮阴条件下的Pn,晋小豆5号Pn最高,中红6号次之。收获后,不同小豆品种的产量与净光合速率的高低相对应。研究结果表明,中红6号是一个在山西中部适应性和光利用能力较强的小豆品种。

Photosynthesis is not only the basis of plant growth and development, but the determinants of plant productivity. Under adzuki bean-corn intercropping mode, two-factor split block experiment with 5 adzuki varieties was used to investigate photosynthetic parameters at flower-pod stage of adzuki beans and their economic characteristics. The results indicated that, the Pn of variety Zhonghong 10 was the highest under intercropping mode, and variety Zhonghong 6 ranked the second; while the Pn of variety Jinxiaodou 5 was the highest under no shade condition, and Zhonghong 6 ranked the second. Because the final yield was be corresponded with the value of Pn, it was thus deduced that variety Zhonghong 6 was the best of all tested varieties, which was suitable to the cultivation of central Shanxi province.