为在白银地区广泛推广通过不同品种玉米间作提高玉米产量提供依据,在白银市平川区宝积镇小川村进行了试验示范，试验品种为在白银地区广泛推广的金穗1915、登海605、先玉1225，通过3个品种2 ∶ 2 ∶ 2间作、1 ∶ 1 ∶ 1间作和单种，比较不同品种玉米间作对农艺性状及产量的影响。结果表明，金穗1915和先玉1225两个品种2 ∶ 2 ∶ 2间作后产量比单种分别高14.54%、11.22%，但是登海605在2 ∶ 2 ∶ 2、1 ∶ 1 ∶ 1间作后产量反而比单种降低9.51%、16.79%，这可能是由于登海605生育期较短导致的。2 ∶ 2 ∶ 2间作模式下群体冠层结构分布更加合理，能够提高光能利用率，促进3个品种玉米植株的生长。因此，当通过不同玉米品种间作提高产量时，宜选择生育期一致的玉米品种按照2 ∶ 2 ∶ 2模式种植。

In order to provide a basis for the widespread promotion of the improvement of maize yield through intercropping of different varieties of maize in Baiyin area, an experimental demonstration was carried out in Xiaochuan Village, Baoji Township, Pingchuan District, Baiyin City, and the experimental varieties were Jinsui 1915(JS1915), Denghai 605(DH605) and Xianyu 1225(XY1225), which were widely popularized in Baiyin area, and the effects of intercropping of different varieties of maize on agronomic traits and yields were compared through 3 varieties of 2 ∶ 2 ∶ 2 intercropping, 1∶1∶1 intercropping and monoculture. Results showed that the yield of Jinsui 1915 and Xianyu 1225 varieties in 2 ∶ 2 ∶ 2 intercropping were 14.54% and 11.22% higher than that of monoculture, respectively, but the yield of Denghai 605 was 9.51% and 16.79% lower than that of monoculture after intercropping at 2 ∶ 2 ∶ 2 and 1 ∶ 1 ∶ 1, respectively, which may be due to the short growth period of Denghai 605. The distribution of canopy structure in the 2 ∶ 2 ∶ 2 intercropping mode was more rationalat the population level, which could improve the utilization rate of light energy, and promote the growth of 3 maize varieties. Therefore, when increasing the yield through 2 ∶ 2 ∶ 2 intercropping or 1 ∶ 1 ∶ 1 intercropping with different maize varieties, it is advisable to choose maize varieties with consistent growth periods and adopt the 2 ∶ 2 ∶ 2 planting pattern.

S513

白银市科技局项目(2022-2-9N)。