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Choosing the right associated crop species in soybean-based intercropping systems: Using a functional approach to understand crop growth dynamics
Field Crops Research ( IF 5.8 ) Pub Date : 2023-05-13 , DOI: 10.1016/j.fcr.2023.108964
Timothée Cheriere, Mathieu Lorin, Guénaëlle Corre-Hellou

Context

Intercropping can contribute to increased crop production and stabilization while reducing biotic stress pressure such as that from weeds. In soybean-based intercropping systems, biomass production of the associated crop is a key performance trait for soybean grain production and weed control services. In some situations, spatial arrangement of crops changes the outcome of the intercropping system considered. Lastly, while trait-based approaches are promising for intercrops design, work remains to associate plant functional traits to crop performances.

Research question

How are plants growth dynamics affected by the associated crop species and spatial arrangement in soybean-based intercrops? Can plant functional traits be related to the grow dynamics parameters?

Methods

The growth dynamics of soybean, associated crop species and weeds were characterized in eight soybean-based intercropping systems differing in associated species (buckwheat, lentil, sorghum and sunflower) and spatial arrangement (alternate-row or within-row combinations). Leaf traits and plant height were measured for the four associated crops and were related to growth dynamics parameters.

Results

Biomass accumulation of the associated crop species was determinant in explaining that of weeds and soybean and thus intercrop performances. Fast and high biomass accumulation by the associated specie implied low weed biomass and to a lesser extent, low soybean biomass accumulation.

For buckwheat-soybean and sorghum-soybean intercropping systems, spatial separation of crops in different rows increased soybean growth. Plant functional traits (particularly leaf area and maximum height) can provide valuable information on plant growth dynamics.

Conclusions

Associated crop species growth dynamics are the main driver of both soybean and weeds biomass accumulation. To a lesser extent, spatial arrangement offers the opportunity to modulate the interspecific competition. Furthermore, some crop functional traits are related to growth dynamic parameters, offering new perspectives for understanding the performances and designing soybean-based intercrops.

Implication or significance

Our results underline that the use of easily measured functional traits can provide useful information for intercropping systems design, facilitating crop selection. Nonetheless, much work remains to understand functional traits combinations.



中文翻译:

在大豆间作系统中选择合适的相关作物物种:使用功能方法了解作物生长动态

语境

间作有助于增加作物产量和稳定作物,同时减少来自杂草的生物胁迫压力。在以大豆为基础的间作系统中,相关作物的生物量生产是大豆粮食生产和杂草控制服务的关键性能特征。在某些情况下,作物的空间排列会改变所考虑的间作系统的结果。最后,虽然基于性状的方法有望用于间作作物设计,但仍需努力将植物功能性状与作物表现联系起来。

研究问题

大豆间作作物的相关作物种类和空间排列如何影响植物生长动态?植物功能性状能否与生长动力学参数相关?

方法

大豆、相关作物物种和杂草的生长动态在八种以大豆为基础的间作系统中进行了表征,这些系统在相关物种(荞麦、扁豆、高粱和向日葵)和空间排列(隔行或行内组合)方面有所不同。测量了四种相关作物的叶片性状和株高,并将其与生长动力学参数相关联。

结果

相关作物物种的生物量积累决定了杂草和大豆的生物量积累,从而决定了间作作物的表现。相关物种的快速和高生物量积累意味着杂草生物量低,并且在较小程度上,大豆生物量积累低。

对于荞麦-大豆和高粱-大豆间作系统,不同行间作物的空间分离促进了大豆生长。植物功能性状(特别是叶面积和最大高度)可以提供有关植物生长动态的宝贵信息。

结论

相关作物物种生长动态是大豆和杂草生物量积累的主要驱动力。在较小程度上,空间安排提供了调节种间竞争的机会。此外,一些作物功能性状与生长动态参数相关,为理解性能和设计大豆间作提供了新的视角。

含义或意义

我们的结果强调,使用易于测量的功能性状可以为间作系统设计提供有用的信息,促进作物选择。尽管如此,要了解功能性状组合仍有许多工作要做。

更新日期:2023-05-13
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