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Quantifying the effects of light quantity and the red: far-red ratio on morphology and physiology of intercropped soybean

量化光量和红光：远红光比对间作大豆形态和生理的影响

基本信息

批准号：
321566826
负责人：
Dr. Sebastian Munz
金额：
--
依托单位：
Fachgebiet Allgemeiner Pflanzenbau (340a)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2016
资助国家：
德国
起止时间：
2015-12-31 至 2017-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/321566826?language=en
关键词：
Quantifying effects light quantity red

项目摘要

Agricultural systems including simultaneously more than one crop (intercropping) are regarded as a very important aspect within the global challenge of sustainable intensification of agriculture. For example, intercropping of maize and legumes is very common. In these systems shading by the larger maize crop modifies considerably the light quantity and as well the light quality - of particular interest the red: far-red ratio - for the legume crop, e.g. soybean. However, the effects of these changes on the productivity of these systems have been poorly understood. Therefore, understanding and quantifying these effects will facilitate to identify relevant morphological and physiological cultivar characteristics of soybean responsible for a high productivity. To achieve these objectives, this project will quantify the effect of light quantity and the red: far-red ratio on morphology and physiology and finally biomass and yield of soybean. A field experiment with maize and soybean intercropped in wide strips - to create a large gradient of light quantity and the red: far-red ratio - will be conducted, in which light quantity, the red: far-red ratio, plant architecture, photosynthesis, biomass and yield will be determined over the created gradient. Then, a recently developed functional-structural plant model will be parameterized and calibrated to account for the measured effects of light quantity and the red: far-red ratio to understand the basic processes involved in light competition. Finally, based on the new knowledge about the processes and the developed plant model, optimum cultivar characteristics can be identified to guide breeding programs. And, the potential productivity of intercropping systems with maize and soybean can be estimated. Moreover, the developed methodological approach will be applicable to other species and intercropping systems.

同时包括多种作物（间作）的农业系统被认为是农业可持续集约化全球挑战中一个非常重要的方面。例如，玉米和豆类的间作非常普遍。在这些系统中，较大的玉米作物的遮光显著地改变了豆类作物（例如大豆）的光量以及光质量-特别感兴趣的是红光：远红光比率。然而，这些变化对这些系统的生产力的影响一直知之甚少。因此，了解和量化这些影响将有助于确定大豆高产的相关形态和生理品种特性。为了实现这些目标，本项目将量化光量和红光：远红光比例对大豆形态和生理以及最终生物量和产量的影响。将进行玉米和大豆宽带间作的田间试验，以产生大的光量和红光：远红光比梯度，其中将在所产生的梯度上确定光量、红光：远红光比、植物结构、光合作用、生物量和产量。然后，最近开发的功能结构植物模型将被参数化和校准，以考虑到测量的光量和红色：远红比的影响，以了解光竞争中涉及的基本过程。最后，基于新的知识的过程和开发的植物模型，最佳的品种特性可以确定，以指导育种计划。同时，还可以估算玉米大豆间作系统的生产潜力。此外，制定的方法将适用于其他物种和间作系统。