Fish Nutrition Lab, Department of Zoology, Government College University Faisalabad, Faisalabad, 38000, Punjab, Pakistan.
Department of Environmental Sciences, Government College University Faisalabad, Faisalabad, 38000, Punjab, Pakistan.
Sci Rep. 2024 Jun 12;14(1):13526. doi: 10.1038/s41598-024-63463-4.
Oreochromis niloticus fingerlings (5.15 ± 0.02 g; n = 315) were fed with different types of biochar (BC)-supplemented sunflower meal-based (SFM) diet to investigate the effects of various BC inclusions on their nutritional digestibility, body composition, hematology and mineral status for 60 days. Seven different diets were formulated based on the SFM based diet: one was a control (TD-I, CON) and the other six diets were supplemented with 2% BC derived from different sources. These BCs were derived from the following: cotton stick (CSBC, TD-II), wheat straw (WSBC, TD-III), corn cob (CCBC, TD-IV), house waste (HWBC, TD-V), grass waste (GWBC, TD-VI), and green waste (GwBC, TD-VII) biochar. There were three replicates for each test diet. Each tank had fifteen tilapia fingerlings, and they were fed with 5% of their live wet weight and twice daily. The outcomes showed that the supplementation of CCBC significantly elevated the growth, nutrient absorption, and body composition of the O. niloticus fingerlings (p < 0.05); with concomitant lowering of the quantity of nutrients released into the water bodies whereas HWBC gave negative impacts. The maximal mineral absorption efficiency (Ca, Na, K, Cu, Fe, P, and Zn) was achieved by the supplementation of 2% CCBC. All hematological parameters showed positive improvements (p < 0.05) with CCBC. Interestingly, CCBC significantly improved the growth, digestibility, body composition, hematology, and mineral status of O. niloticus.
奥利亚罗非鱼鱼苗（5.15±0.02g；n=315）用不同类型的生物炭（BC）补充葵花籽饼（SFM）饲料喂养，以研究不同 BC 含量对其营养消化率、体成分、血液学和矿物质状况的影响，为期 60 天。基于 SFM 饲料，设计了七种不同的饲料：一种是对照（TD-I，CON），另六种饲料分别用 2%来自不同来源的生物炭补充。这些生物炭分别来自：棉棒（CSBC，TD-II）、小麦秸秆（WSBC，TD-III）、玉米芯（CCBC，TD-IV）、生活垃圾（HWBC，TD-V）、草废料（GWBC，TD-VI）和绿废料（GwBC，TD-VII）生物炭。每种试验饲料有三个重复。每个水槽有 15 尾罗非鱼鱼苗，投喂量为其活体重的 5%，每日两次。结果表明，CCBC 的添加显著提高了奥利亚罗非鱼鱼苗的生长、养分吸收和体成分（p<0.05）；同时降低了营养物质释放到水体中的数量，而 HWBC 则产生负面影响。添加 2% CCBC 可获得最大的矿物吸收效率（Ca、Na、K、Cu、Fe、P 和 Zn）。所有血液学参数均有显著改善（p<0.05）。有趣的是，CCBC 显著改善了奥利亚罗非鱼的生长、消化率、体成分、血液学和矿物质状况。
