摘要
为探讨木薯Manihot esculenta渣和甘蔗Saccharum officinarum渣对砖红壤的改良效果,采用单一因素试验设计,通过土壤模拟培养试验方法,选取海南地区常见的农业废弃物木薯渣和甘蔗渣为前驱物,经650℃热解制备生物炭,研究不同添加量的甘蔗渣基生物炭和木薯渣基生物炭(0、0.1%、0.5%、1%和5%)对砖红壤的容重、孔隙度、团聚体等物理性状和pH、阳离子交换量(CEC)、有机质、有效N、有效P、有效K等化学性质的影响。结果表明,热解后甘蔗渣炭和木薯渣炭都有较高的C含量,远高于其他元素,代表芳香性和极性的C/H、C/O值也较高;加入砖红壤后与对照CK相比,加入生物炭后砖红壤的物理性质中容重显著降低,孔隙度大于0.25 mm团聚体的含量显著增加,物理结构有了显著优化;化学性质中砖红壤的pH、有效N、有效P、有效K、有机质和阳离子交换量都有了显著提高。利用主成分分析综合对比评价发现,甘蔗渣基生物炭对砖红壤的改良效果优于木薯渣基生物炭。
Common agricultural wastes,cassava residues and sugarcane bagasse,were selected from Hainan as precursor materials to produce biochar through 650℃pyrolysis with a single-factor experimental design,and the biochar was used to treat lateritic soil in the south of China at different rates(0,0.1%,0.5%,1%and 5%)to observe the effect of the biochar on the physical properties such as bulk density,porosity,aggregates,etc,and chemical properties such as pH,cation exchange capacity(CEC),organic matter,available N,available P,available K,etc.The results showed that the biochar derived from sugarcane bagasse and cassava residues was higher in C content,much higher than in other elements,and was also higher in C/H and C/O ratios,which represent aromaticity and polarity.The biochar treatment resulted in significant improvement in the soil physical properties as compared with the control.Specifically,the bulk density of the lateritic soil significantly decreased,while the porosity and the content of macroaggregates(>0.25 mm)increased significantly.For the chemical properties of the lateritic soil,the pH,available N,available P,available K,organic matter,and CEC also increased significantly in the biochar treatment.Principal component analysis showed that the biochar derived from sugarcane bagasse had higher ameliorative effect on the lateritic soil than the biochar derived from cassava residues.
作者
李昉泽
詹剑
LI Fangze;ZHAN Jian(Beijing General Research Institute of Mining&Metallurgy Technology Group,Beijing,100160,China;Zijin Mining Group Company Limited,Longyan,Fujian,364208,China)
出处
《热带生物学报》
2023年第5期577-584,共8页
Journal of Tropical Biology
基金
矿冶科技集团有限公司青年科技创新基金(04-2204)。
关键词
甘蔗渣
木薯渣
生物炭
砖红壤改良
bagasse
cassava residue
biochar
lateritic soil improvement
