Perennial leafy grasses and legumes are promising for extraction of proteins with a green biorefinery amid increasing demand for local production. However, which defoliation strategy increases radiation-use efficiency and biomass production still needs to be determined. A multi-year field experiment started in 2019 in Denmark with fertilized grasses (perennial ryegrass, tall fescue), unfertilized legumes (alfalfa, red clover) and their fertilized mixture (grass-legume), each defoliated at 2-, 4- or 8- weeks interval, at either 7-9 or 12-14 cm defoliation height. The main aim was to quantify effects of species, defoliation height and frequency, and nitrogen application rate on canopy radiation interception, aboveground biomass and crude protein production, as well as aboveground radiation use efficiency (RUEA).

中文翻译：

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为大型树冠辐射利用和用于生物精炼厂的多年生系统的生物质生产定制落叶和氮管理


随着对当地生产的需求不断增加，多年生绿叶草和豆类有望通过绿色生物精炼厂提取蛋白质。然而，哪种落叶策略可以提高辐射利用效率和生物量生产仍然需要确定。丹麦于 2019 年开始了一项多年田间试验，试验对象为受精的禾本科植物（多年生黑麦草、高羊茅）、未受精的豆科植物（苜蓿、红三叶草）及其受精的混合物（草-豆科植物），每种植物在 2、4 或 8 落叶。 - 间隔几周，落叶高度为 7-9 或 12-14 厘米。主要目的是量化物种、落叶高度和频率以及施氮量对冠层辐射拦截、地上生物量和粗蛋白产量以及地上辐射利用效率（RUEA）的影响。