Abstract This work assesses the suitability of recycled crushed bricks and compost, used as a mixed growing substrate, in urban roadside plantings of Tilia cordata Mill. Coarse recycled materials can prevent compaction, improving air and water flows in the rhizosphere, and thus reducing tree mortality or poor growth. In addition, compost is a source of organic matter, contributing to enhance soil quality. Six substrates were tested: 1) soil; 2) crushed bricks 0–30 mm; 3) crushed bricks 6–30 mm; 4) soil + compost (15% v/v); 5) crushed bricks 0–30 mm + compost; and 6) crushed bricks 6–30 mm + compost. Trees were planted in 0.6 × 0.6 × 0.6 m pits, filled with the six different substrates. The water infiltration rate (Kf) and load bearing capacity (Evd) of the substrate were monitored along with the shoot length, and chlorophyll content of the trees. At the end of the trial, the root biomass and total root length were measured. Crushed bricks positively affected Kf, and Evd; the presence of compost decreased the value of bearing capacity. 0–30 crushed brick substrates (with or without compost) increased the linden shoot length and enabled to develop higher root biomass, compared to the soil (+72%) and 6–30 (+37%). The best trade-off between resistance, compaction and plant growth was 0–30 mm crushed bricks. This research provides evidence that a coarse matrix substrate made of crushed bricks is efficient in preventing compaction and allows plant growth.

中文翻译：

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使用粗基质提高水渗透率和植树承载力

摘要 这项工作评估了用作混合生长基质的回收碎砖和堆肥在 Tilia cordata Mill 的城市路边种植中的适用性。粗再生材料可以防止压实，改善根际空气和水的流动，​​从而降低树木死亡率或生长不良。此外，堆肥是有机质的来源，有助于提高土壤质量。测试了六种基材：1) 土壤；2）碎砖0-30毫米；3）碎砖6-30毫米；4) 土壤 + 堆肥 (15% v/v)；5）碎砖0-30毫米+堆肥；和 6) 碎砖 6-30 毫米 + 堆肥。树木被种植在 0.6 × 0.6 × 0.6 m 的坑里，坑里装满了六种不同的基质。监测基质的水分渗透率 (Kf) 和承载能力 (Evd)，以及树木的枝条长度和叶绿素含量。在试验结束时，测量根生物量和总根长。碎砖对 Kf 和 Evd 产生了积极影响；堆肥的存在降低了承载力的值。与土壤 (+72%) 和 6-30 (+37%) 相比，0-30 块碎砖基质（有或没有堆肥）增加了菩提树的枝条长度，并能够产生更高的根生物量。阻力、压实和植物生长之间的最佳平衡是 0-30 毫米的碎砖。这项研究提供的证据表明，由碎砖制成的粗基质基质可有效防止压实并促进植物生长。与土壤 (+72%) 和 6-30 (+37%) 相比，0-30 块碎砖基质（有或没有堆肥）增加了菩提树的枝条长度，并能够产生更高的根生物量。阻力、压实和植物生长之间的最佳平衡是 0-30 毫米的碎砖。这项研究提供的证据表明，由碎砖制成的粗基质基质可有效防止压实并促进植物生长。与土壤 (+72%) 和 6-30 (+37%) 相比，0-30 块碎砖基质（有或没有堆肥）增加了菩提树的枝条长度，并能够产生更高的根生物量。阻力、压实和植物生长之间的最佳平衡是 0-30 毫米的碎砖。这项研究提供的证据表明，由碎砖制成的粗基质基质可有效防止压实并促进植物生长。