量化不同配置的大豆-玉米带交叉作物作物的空间-时间光线拦截的量化
Fu Jin1,2,3, Zhihua Wang1,2,3, Haizhao Zhang1,2,3
1College of Agronomy, Sichuan Agricultural University, Chengdu, China.
Frontiers in plant science
|October 15, 2024
概括
优化交叉作物排列配置可以提高光线拦截和作物产量. 一个新的模型准确地预测了光线拦截,指导了增加大豆和整体系统生产力的策略.
科学领域:
- 农业科学 农业科学
- 农业学是一种农业学.
- 植物生理学作物生理学
背景情况:
- 交叉作物系统为在有限的农业用地上改善光线拦截和作物产量提供了潜力.
- 排列配置是影响交叉作物系统中光拦截动态的关键因素.
- 精确量化时空光拦截对于优化交叉作物配置和最大化产量至关重要.
研究的目的:
- 量化不同排列配置对玉米和大豆交叉作物的光拦截的影响.
- 开发和验证一个预测模型,用于间接作物系统的时空空间光拦截.
- 评估光线拦截,作物生长和在不同的交叉作物安排下产量的关系.
主要方法:
- 一项为期两年的实地实验评估了五种治疗方法:2M3S,2M4S,2M5S,豆 (SS) 和玉米 (SM).
- 使用太阳升高角度和作物叶面积密度 (LAD) 开发了一种多重回归模型,以预测光拦截.
- 用测量的光合作用活性辐射 (PAR) 和干物质积累来验证模型的准确性 (R2>0.814对于 PAR,R2>0.830对于干物质).
主要成果:
- 增加大豆行 (例如,2M5S与2M3S) 显著增强了大豆和下层玉米层的光拦截,但在上层玉米树冠上减少了光拦截.
- 与2M3S相比,2M5S对大豆的年度平均累积光线拦截增加了44%以上,2M3S相比,2M5S的年度平均累积光线拦截增加了44%以上,而整个玉米树冠拦截减少了13%以上.
- 在2M4S配置中,系统产量得到了最大化,这表明了个人作物光捕获和整体系统生产率之间的权衡.
结论:
- 开发的光拦截模型准确量化了带间作物中的时间和空间光动态.
- 优化行列配置对于平衡杂交作物之间的光分布至关重要,这会影响干物和产量.
- 2M4S配置显示了最好的整体系统产量,突出了其提高玉米-大豆杂交作物的生产率的潜力.
相关概念视频
Light Acquisition
8.4K
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
8.4K
The Antenna Complex
5.9K
Plants and other photosynthetic organisms comprise pigments capable of absorption of direct sunlight. These pigments are present in the reaction center - the main site of photochemical reactions as well as in the antenna complex. Under average light conditions, the rate at which reaction center pigments absorb light is far below the electron transport chain's capacity. As a result, the reaction center alone cannot provide enough energy to drive photosynthesis. The photosynthetic efficiency...
5.9K


