大豆品种改善了树冠架构和光线分布,以促进玉米-大豆带交叉作物的产量形成
Kai Luo1, Xiaoting Yuan1,2, Kejing Zhang1
1College of Agronomy, Sichuan Agricultural University/Sichuan Engineering Research Centre for Crop Strip Intercropping System/Key Laboratory of Crop Ecophysiology and Farming System in Southwest, Ministry of Agriculture and Rural Affairs, Chengdu, China.
Plant, cell & environment
|September 29, 2025
概括
选择适合的大豆品种用于玉米-大豆中继带交叉作物 (MSR) 是关键. 中期和晚期成熟的分枝类型在MSR中壮成长,改善光捕捉和产量稳定性.
科学领域:
- 农业学是一种农业学.
- 农作物科学 农作物科学
- 植物生理学 植物生理学
背景情况:
- 玉米-大豆交叉作物 (MSI) 和继电带交叉作物 (MSR) 系统面临着玉米遮阳降低大豆光合作用能力和产量的挑战.
- 优化大豆品种选择对于减轻产量损失和确保这些系统的稳定生产至关重要.
研究的目的:
- 评估不同种植模式 (单一大豆,MSI,MSR) 对四种大豆品种的生长和产量的影响.
- 通过分析它们对光线条件和补偿生长的反应来确定适合MSR系统的大豆品种.
主要方法:
- 在两年内 (2021-2022) 进行的实地实验比较了单豆 (SS),MSI和MSR系统.
- 评估了四种大豆品种 (GQ8,GX7,ND25,NN996) 的生长,产量,光合作用率,生物质积累和树冠光照条件.
主要成果:
- MSR维持了晚熟,分枝品种 (ND25,GQ8) 的产量,而MSI则将所有品种的产量降低了24.2%-37.1%.
- 在玉米收获后,MSR改善了中间和下层树冠的光线条件 (PAR透光率>70%),提高了光合作用率.
- 在合适的品种中,MSR促进了枝分枝和叶子的形成,导致了与SS相比的叶面积指数和生物质的增加.
结论:
- 中期和晚期成熟的大豆品种具有强大的分支,是MSR系统的理想选择.
- 这些品种优化了树冠结构,光线拦截,并补偿了早期的生物质损失,确保了产量稳定或提高.
- 结果为玉米-大豆杂交作物的品种选择和种植策略提供了指导.
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