摘要
为探究有效降低鸡粪Cu和Zn生物有效性的适宜裂解温度,以盆栽方法研究不同热裂解温度(250、400和550℃)制成的鸡粪炭(CB250、CB400和CB500)对小白菜Cu、Zn吸收,以及土壤Cu、Zn形态分布的影响.结果显示,与对照(CK)相比,添加鸡粪(CM)、CB250、CB400和CB550处理的小白菜生物量均显著提高(P<0.05);但与CM处理相比,CB400和CB550处理的小白菜Cu、Zn含量显著降低(P<0.05),且CB400处理的小白菜Cu、Zn吸收量分别显著降低了53.9%和43.3%(P<0.05).虽然添加鸡粪炭处理土壤Cu、Zn含量显著高于CM处理(P<0.05),但淋溶液Cu、Zn总量和土壤交换态Cu、Zn含量却显著降低(P<0.05),且有机结合态和铁锰氧化态含量显著提高(P<0.05).由此可见,鸡粪在400℃条件下裂解成生物炭可高效降低Cu、Zn的生物有效性.
In order to explore the optimum pyrolysis temperature to effectively reduce the bioavailab ility of Cu and Zn in chicken manure,the effects of chicken manure biochar pyrolyzed at 250,400 and 550℃(marked as CB250,CB400 and CB500,respectively)on the absorption of Cu and Zn by pakchoi and the speciation distri⁃butions of Cu and Zn in soil with the pot method.Results showed that the biomass of pakchoi in CM(chicken manure),CB250,CB400 and CB550 treatments were all significantly increased when compared with CK.How⁃ever,compared with CM treatment,the contents of Zn and Cu in pakchoi by CB400 and CB550 treatments were both significantly decreased,and the amounts of Zn and Cu absorbed by pakchoi in CB400 treatment were sig⁃nificantly decreased by 53.9%and 43.3%,respectively.Although the contents of soil Cu and Zn in biochar treatments were significantly higher than CM treatment,the amounts of leachate Cu and Zn and the contents of soil exchangeable Cu and Zn were significantly decreased,and the organic bounded and residual states of soil Cu and Zn were increased significantly.It follows that thermal pyrolysis of chicken manure to biochar at 400℃can effectively reduce the bioavailability of Cu and Zn.
作者
林志斌
刘伟
叶祖云
郝敏
陈文渊
张陆强
LIN Zhi-bin;LIU Wei;YE Zu-yun;HAO Min;CHEN Wen-yuan;ZHANG Lu-qiang(College of Life Science,Ningde Normal University,Ningde,Fujian 352100,China;The Institute of Chinese White Tea Research,Ningde,Fujian 355220,China;The Tea Sensory Evaluation Research Center of Ningde Normal University,Ningde,Fujian 352100,China;Engineering Technology Research Center of Characteristic Medicinal Plants of Fujian,Ningde,Fujian 352100,China)
出处
《宁德师范学院学报（自然科学版）》
2023年第4期422-428,共7页
Journal of Ningde Normal University(Natural Science)
基金
引进人才科研启动项目(2020Y08)
中国白茶研究院项目(2021HX19,BCY2022K02)。
关键词
鸡粪
裂解温度
生物炭
重金属
生物有效性
chicken manure
pyrolysis temperature
biochar
heavy metals
bioavailability
