Recycling fishery waste into biobased fertilizers: Agronomic performance and soil health impacts

作者：Jingsi Zhang, Liina Edesi, Tiina Talve, Çağrı Akyol, Birgit Koll, Ireene Roman, Merili Toom, Marta Aranguren, Susana Virgel Mentxaka, Annely Kuu, Stefaan De Neve, Erik Meers · 发表于：Soil and Tillage Research · 年份：2025 · DOI：10.1016/j.still.2025.106686 · 被引用次数：5 · 研究领域：Phosphorus and nutrient management、Aquaculture Nutrition and Growth、Phytase and its Applications

This study evaluated the agronomic performance and soil impact of biobased fertilizers derived from fishery waste and by-products as circular alternatives to synthetic nitrogen (N) fertilizers in short-term field experiments with broccoli. Four biobased fertilizers — bokashi pellet (BP), nutrient solution with amino acids (NPKA), fish sludge pellet (FSP), and protein fraction (PF) — were obtained from pilot installations across Europe. The evaluation focused on soil mineral N (SMN) dynamics, N use efficiency (NUE), crop yield, and soil biological responses. One week after transplanting and fertilization, SMN levels in the topsoil (0–10 cm) were the highest in the NPKA (253 ± 94 kg ha⁻¹) and PF (181 ± 45 kg ha⁻¹) treatments, comparble to the mineral fertilizer (MF; 237 ± 5 kg ha⁻¹). In contrast, FSP (68 ± 17 kg ha⁻¹) and BP (30 ± 11 kg ha⁻¹) did not significantly differ from the unfertilized soil (40 ± 5 kg ha⁻¹). Early SMN availability showed a strong positive correlation with broccoli yield and N uptake. Crop yields ranged from 8594 to 14,842 kg ha⁻¹ among the organic treatments, with NPKA and PF performing comparably to MF (14,726 kg ha⁻¹) and substantially better than FSP and BP. The control treatment (CON) yielded 9252 kg ha⁻¹ . NPKA and PF also demonstrated the highest NUE values (108 % and 84.8 %, respectively), with estimated mineral fertilizer equivalents of 79.5 % and 62.7 %. Soil biological activity showed treatment-specific responses. Dehydrogenase activity, microb...