玉米甘薯间作对玉米产量形成相关因子的影响

Effects of Corn-Sweet Potato Intercropping on the Relevant Factors of Corn Yield Formation

[目的]研究玉米甘薯间作对玉米产量形成相关因子的影响。[方法]研究3种种植方式(单作玉米、玉米甘薯间作2∶8型和1∶8型)及2个施氮水平(300、450 kg/hm^2)对玉米产量形成相关因子的影响。[结果]玉米甘薯间作与单作玉米相比增加了各生育时期的单株叶面积,提高了叶面积指数和单株干物质积累速率,促进了干物质向籽粒分配,使玉米单株产量提高。增施氮肥处理明显提高了间作玉米单株叶面积、叶面积指数和各生育时期的干物质积累,减少了干物质向籽粒分配。间作玉米单株产量高于单作玉米。[结论]玉米甘薯间作种植能够增加单位土地面积上作物产量,有利于保障粮食安全和提高农民收入。

[Objective]To research the effects of intercropping of corn and sweet potato on the relevant factors of corn yield formation. [Method] Two planting forms were designed with the ratio of maize monoculture to maize-sweet potato intercropping being 2∶ 8 and 1∶ 8. And two nitrogen levels of 300 and 450 kg/hm^2 were set to research the effects on corn yield relevant factors. [Result] Compared with maize monoculture,maize-sweet potato intercropping enhanced the leaf area per plant,leaf area index,and dry-matter accumulation per plant in different growth stages,promoted the allocation of dry matters to grain,and enhanced the corn yield per plant. Increasing nitrogen treatment significantly improved the leaf area per plant,leaf area index and dry matter accumulation in maize-sweet potato intercropping,and reduced the allocation of dry matters to grain. Maize-sweet potato intercropping had higher dry matter content than maize monoculture. [Conclusion]Maize-sweet potato intercropping enhances the crop yield per unit land area,and is helpful to ensure the grain safety and enhance the farmars＇ income.