Arundo donax L. has been recognized as a promising biomass crop for bioenergy and biobased applications. Previous nitrogen fertilization studies of this crop were based on conventional fertilizer application (broadcast). Fertigation is considered an efficient strategy to reduce nutrient loss in irrigated crops. The objective of this study was to investigate the effect of nitrogen fertigation on A.donax grown in low fertility soil, under a continental Mediterranean climate. Three levels of nitrogen supply (N) were studied: 0 N (0 kg ha⁻¹ year⁻¹), 60 N (60 kg ha⁻¹ year⁻¹); and 120 N (120 kg ha⁻¹ year⁻¹). Biometric parameters, leaf chlorophyll content, leaf weight percentage, biomass production and biomass quality as well as soil macronutrient concentration were evaluated. Nitrogen use efficiency and energy yield increase due to fertilization were also determined. Compared with unfertilized plants, fertigation increased plant height, basal diameter of stem, chlorophyll content, biomass production and fiber composition. However, the increase in N rate from 60 to 120 kg ha⁻¹ year⁻¹did not affect biomass yield. Energy increase due to N fertigation and nitrogen use efficiency led to the recommendation of using a fertigation N rate of 60 kg ha⁻¹ for the A.donax cultivation in these experimental conditions.

Arundo donax L.被公认为是有前途的生物能源作物，可用于生物能源和生物基应用。以前该作物的氮肥研究基于传统的肥料施用（广播）。施肥被认为是减少灌溉作物养分流失的有效策略。这项研究的目的是研究氮肥对地中海大陆气候下低肥力土壤中生长的A.donax的影响。研究了三个水平的氮供应（N）：0 N（0千克公顷- ¹年^-1），60 N（60千克公顷- ¹年^-1）；和120 N（120 kg公顷- ¹年^-1）。评价了生物特征参数，叶片叶绿素含量，叶片重量百分比，生物量产量和生物量质量以及土壤大量养分含量。还确定了由于施肥导致的氮利用效率和能量产量的增加。与未施肥的植物相比，施肥增加了植物的高度，茎的基础直径，叶绿素含量，生物量产生和纤维组成。然而，从60到120增加氮肥用量公斤公顷^-1年^-1不影响生物质产量。由于氮肥和氮的利用效率导致能量增加，因此建议在这些实验条件下，以60 kg ha ^-1的氮肥施肥量进行A.donax的种植。