Enhancing growth, quality, and metabolism of nitrogen of alfalfa (Medicago sativa L.) by high red–blue light intensity

IF 2.6 3区 农林科学 Q1 AGRONOMY
Yanqi Chen, Jiayuan Liu, Wenke Liu
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Abstract

Background

In countries characterized by limited per capita arable land and grassland, agricultural development is hindered by insufficient forage productivity. The plant factory with artificial light (PFAL) system has emerged as a highly efficient approach to address this challenge by cultivating forage on finite land resources. In the PFAL framework, the regulation of light intensity plays a critical role in determining both the yield and quality of cultivated plants.

Aims

This study seeks to delve into the optimal range of light intensity for achieving high efficiency and quality in the production of alfalfa in the PFAL. Additionally, it seeks to explore the effects of light intensity on nitrogen metabolism, as well as the accumulation and metabolism of amino acid in alfalfa.

Methods

To achieve these objectives, alfalfa was sown and subjected to five treatments involving red and blue LED light in a 4:1 ratio. The light intensities used were 200, 300, 400, 500, and 600 µmol m–2 s−1, respectively. The alfalfa plants were then harvested at intervals of 15, 20, 25, 30, and 35 days. The quality and nitrogen metabolisms of alfalfa during this period were assessed by evaluating the plant's growth performance and determining the optimal cutting time.

Conclusion

In summary, high-light intensity (400–600 µmol m−2 s−1) improved alfalfa yield and quality, while also promoting nitrogen and amino acid metabolism. Photon flux density at 400–500 µmol m−2 s−1 light intensity for a duration of 30 days was identified as the optimal condition for PFAL alfalfa production.

高红蓝光对紫花苜蓿生长、品质及氮代谢的促进作用
在人均可耕地和草地有限的国家,饲草生产力不足阻碍了农业发展。人工光植物工厂(PFAL)系统通过在有限的土地资源上种植牧草,成为解决这一挑战的一种高效方法。在PFAL框架下,光强调控对栽培植物的产量和品质都起着至关重要的作用。目的本研究旨在探讨在pal地区实现苜蓿高效、优质生产的最佳光强范围。此外,探讨光照强度对紫花苜蓿氮素代谢及氨基酸积累代谢的影响。方法以紫花苜蓿为研究对象,采用红蓝光LED灯按4:1的比例进行5种处理。使用的光强分别为200、300、400、500和600µmol m-2 s−1。然后在15、20、25、30和35天的间隔内收获苜蓿植株。通过评价植株生长性能和确定最佳刈割时间,评价这一时期紫花苜蓿的品质和氮代谢。综上所述,高光照强度(400 ~ 600µmol m−2 s−1)提高了紫花苜蓿的产量和品质,同时促进了氮和氨基酸代谢。在400-500µmol m−2 s−1光强下,持续30天的光子通量密度是pal苜蓿生产的最佳条件。
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来源期刊
CiteScore
4.70
自引率
8.00%
发文量
90
审稿时长
8-16 weeks
期刊介绍: Established in 1922, the Journal of Plant Nutrition and Soil Science (JPNSS) is an international peer-reviewed journal devoted to cover the entire spectrum of plant nutrition and soil science from different scale units, e.g. agroecosystem to natural systems. With its wide scope and focus on soil-plant interactions, JPNSS is one of the leading journals on this topic. Articles in JPNSS include reviews, high-standard original papers, and short communications and represent challenging research of international significance. The Journal of Plant Nutrition and Soil Science is one of the world’s oldest journals. You can trust in a peer-reviewed journal that has been established in the plant and soil science community for almost 100 years. Journal of Plant Nutrition and Soil Science (ISSN 1436-8730) is published in six volumes per year, by the German Societies of Plant Nutrition (DGP) and Soil Science (DBG). Furthermore, the Journal of Plant Nutrition and Soil Science (JPNSS) is a Cooperating Journal of the International Union of Soil Science (IUSS). The journal is produced by Wiley-VCH. Topical Divisions of the Journal of Plant Nutrition and Soil Science that are receiving increasing attention are: JPNSS – Topical Divisions Special timely focus in interdisciplinarity: - sustainability & critical zone science. Soil-Plant Interactions: - rhizosphere science & soil ecology - pollutant cycling & plant-soil protection - land use & climate change. Soil Science: - soil chemistry & soil physics - soil biology & biogeochemistry - soil genesis & mineralogy. Plant Nutrition: - plant nutritional physiology - nutrient dynamics & soil fertility - ecophysiological aspects of plant nutrition.
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