The effect of strip orientation and width on radiation interception in maize-soybean strip intercropping systems

文献类型： 外文期刊

第一作者： Liu, Haitao

作者： Liu, Haitao;Chen, Shanghong;Guo, Song;Tian, Jing;Yao, Li;Lin, Chaowen;Liu, Haitao;Li, Baoguo

作者机构：

关键词： maize-soybean strip intercropping; PAR interception; strip orientation; strip width

期刊名称：FOOD AND ENERGY SECURITY （ 影响因子：4.667； 五年影响因子：6.487 ）

ISSN： 2048-3694

年卷期： 2022 年 11 卷 2 期

页码：

收录情况： SCI

摘要： Maize-soybean intercropping systems are widely used in developing countries, but few studies have been performed to optimize such systems. The effects of strip width and orientation on photosynthetically active radiation (PAR) distribution characteristics were therefore determined to gain a better understanding of crop productivity in maize-soybean intercropping systems. A series of intercropping experiments incorporating different strip orientations and widths were conducted. In addition, an improved radiation transmission model was used to simulate PAR interception by the maize and soybean crops. We found that more PAR was intercepted by the soybean plants than by the maize plants when the strip orientation angle increased from 0 degrees to 90 degrees in the maize-soybean intercropping systems. This result was obtained in most of the main maize production areas, including those with different latitudes. The effect of strip widths within the intercropping systems also had a significant effect on PAR interception. The relative fraction of PAR intercepted ranged from 39.4% to 86% for soybean and 105.8% to 169.3% for maize. The effect of soybean strip width on leaf PAR interception was greater than that of maize strip width. These results are not only of fundamental biological importance but they also have important implications for agriculture in terms of the optimization of production in intercropping systems.

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