In reclaimed land, the growth environment for plants may be unfavorable and the initial establishment and growth of seedlings could be limited because of low nutrient and water availability. Fertilization and control of understory vegetation that competes with seedlings may be of help in ameliorating soil physical and chemical properties, resulting in better seedling growth and reclamation success. However, the amount of nutrients understory vegetation absorbs in this ecological process has been rarely studied. Thus, we aimed to investigate the effect of soil amendment on biomass production and nutrient uptake by weeds in the nutrient-poor reclaimed area. We applied three levels of torrefied wood chip (TWC; 0, 2.5, and 5 Mg ha−1) and two levels of vermicompost (VC; 0 and 2.7 Mg ha−1) as soil physical improvements and organic soil amendments in reclaimed land in the Republic of Korea, with Populus euramericana used as the crop tree. TWC did not influence weed biomass, but 2.7 Mg ha−1 VC significantly increased weed biomass by 21% compared to 0 Mg ha−1 VC treatments. Nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg), and sodium (Na) concentrations in weeds were the highest in control, but there was no statistical difference among treatments. However, VC treatment did marginally increase nutrient uptake in weeds, especially P, K, Ca, and Na. No treatments influenced crop tree height. We conclude that VC can be used as an organic source of nutrients in reclaimed soil and that weed management is necessary to increase treatment effects on crop trees in this salt-affected reclaimed land.

中文翻译：

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磨碎的木片和ver堆肥对Saemangeum开垦土地上植被生长和养分吸收的影响

在开垦土地上，由于养分和水的利用率低，植物的生长环境可能不利，幼苗的最初建立和生长可能受到限制。施肥和控制与幼苗竞争的林下植被可能有助于改善土壤的物理和化学特性，从而提高幼苗的生长和开垦成功。但是，很少有人研究这种生态过程中林下植被吸收的养分量。因此，我们旨在研究土壤改良剂对营养贫乏地区的杂草生物量生产和养分吸收的影响。我们应用了三层烘焙过的木片（TWC; 0、2.5和5 Mg ha-1）和两层ver堆（VC; 0和2。7 Mg ha-1）作为大韩民国开垦土地上的土壤物理改良剂和有机土壤改良剂，以欧洲杨（Populus euramericana）作为农作物树。TWC不会影响杂草生物量，但是与0 Mg ha-1 VC处理相比，2.7 Mg ha-1 VC显着提高了21％的杂草生物量。杂草中氮（N），磷（P），钾（K），钙（Ca），镁（Mg）和钠（Na）的浓度在对照中最高，但各处理之间无统计学差异。但是，VC处理确实略微增加了杂草（尤其是P，K，Ca和Na）中养分的吸收。没有任何处理影响作物树的高度。我们得出的结论是，VC可以用作开垦土壤中养分的有机来源，杂草管理对于提高对这片受盐碱影响的开垦土地对农作物树木的处理效果是必要的。