Enhancing Switchgrass Growth With Biochar Derived From Mushroom Residue: A Study on Regulating Physicochemical Properties of Acidic Phosphogypsum
文献类型： 外文期刊
作者： Xiang, Yangzhou 1 ; Mao, Yanting 2 ; Liu, Ying 3 ; Luo, Yang 1 ; Xue, Jianming 4 ; He, Ji 5 ; Shurpali, Narasinha J. 6 ; Bhattarai, Hem Raj 6 ; Deepagoda, T. K. K. Chamindu 7 ; Yao, Bin 8 ; Siddique, Kadambot H. M. 9 ; Li, Yuan 6 ;
作者机构： 1.Guizhou Educ Univ, Sch Geog & Resources, Guiyang, Peoples R China
2.Yunnan Acad Agr Sci YAAS, Inst Agr Environm & Resources, Kunming, Peoples R China
3.Guizhou Educ Univ, Sch Biol Sci, Guiyang, Peoples R China
4.Scion, Christchurch, New Zealand
5.Guizhou Univ, Agr Coll, Guiyang, Peoples R China
6.Nat Resources Inst Finland, Prod Syst Unit, Grasslands & Sustainable Farming, Maaninka, Finland
7.Lincoln Univ, Dept Soil & Phys Sci, Lincoln, New Zealand
8.Chinese Acad Forestry, Inst Ecol Conservat & Restorat, State Key Lab Tree Genet & Breeding, Beijing, Peoples R China
9.Univ Western Australia, UWA Inst Agr, Perth, WA, Australia
关键词： ameliorant effect; biochar; mushroom residue; phosphogypsum; switchgrass
期刊名称：FOOD AND ENERGY SECURITY （ 影响因子：4.5； 五年影响因子：5.4 ）
ISSN： 2048-3694
年卷期： 2025 年 14 卷 1 期
页码：
收录情况： SCI
摘要： Acidity limits plant growth, particularly when the growing medium has a pH below 5, a challenge that is particularly relevant for certain plants like switchgrass (Panicum virgatum). Although adding biochar to the growing medium has been shown to improve plant growth by modulating acidity, its specific impact on switchgrass remains largely uninvestigated. Thus, we conducted a pot experiment to assess how different biochar application rates (0%, 1%, 2.5%, 5%, 10%, and 20% w/w), derived from mushroom residue through muffle furnace pyrolysis at 350 degrees C for 2 h, affect the physicochemical attributes of phosphogypsum and subsequent switchgrass growth. Our findings revealed that adding biochar to phosphogypsum significantly alleviated acidity and enhanced moisture, organic matter, total nitrogen, total phosphorus, total potassium, available phosphorus, and available potassium contents. Notably, the 10% biochar treatment had the most positive impacts on germination rates, while the 5% treatment had the greatest improvements in shoot length, tiller number, and total weight compared to the control. Structural equation modeling illustrated that biochar indirectly contributed to switchgrass health by altering the physicochemical properties of phosphogypsum, with pH as the pivotal regulator. Our study demonstrated the potential of mushroom residue biochar as an effective amendment for acidic substrates/matrix (e.g., soil), offering a promising strategy to improve physicochemical conditions and stimulate plant growth.
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