Biochar derived from rice husk: Impact on soil enzyme and microbial dynamics, lettuce growth, and toxicity

被引:7
|
作者
Akumuntu A. [1 ]
Hong J.-K. [2 ]
Jho E.H. [1 ,3 ]
Omidoyin K.C. [1 ]
Park S.-J. [4 ]
Zhang Q. [5 ]
Zhao X. [6 ]
机构
[1] Department of Agricultural Chemistry, Chonnam National University, Gwangju
[2] Department of Environmental and Energy Engineering, Yonsei University, Wonju
[3] Department of Agricultural and Biological Chemistry, Chonnam National University, Gwangju
[4] Department of Bioresources and Rural Systems Engineering, Hankyong National University, Anseong
[5] State Key Laboratory of Efficient Utilization of Arid and Semi-arid Arable Land in Northern China, the Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing
[6] Department of Civil and Environmental Engineering, Seoul National University, Seoul
基金
新加坡国家研究基金会;
关键词
Enzyme activity; Lettuce; Microbial community; Rice husk biochar;
D O I
10.1016/j.chemosphere.2023.140868
中图分类号
学科分类号
摘要
This study was set to investigate the effects of rice husk biochar (RHB) on soil characteristics and growth of lettuce (Lactuca sativa). A comprehensive research approach was employed to examine the effect of different RHB concentrations (i.e., 0–1.5%) on soil pH, soil enzyme activities (i.e., alkaline phosphatase, beta-glucosidase, and dehydrogenase), soil microbial community, lettuce growth, and earthworm toxicity. The results showed that, within the studied RHB concentration range, the RHB application did not have significant effects on the soil pH. However, the enzyme activities were increased with increasing RHB concentration after the 28 d-lettuce growth period. The RHB application also increased the abundances of the bacterial genera Massilia and Bacillus and fungal genus Trichocladium having the plant growth promoting abilities. Furthermore, the study revealed that the root weight and number of lettuce leaves were significantly increased in the presence of the RHB, and the growth was dependent on the RHB concentration. The improved lettuce growth can be explained by the changes in the enzyme and microbial dynamics, which have resulted from the increased nutrient availability with the RHB application. Additionally, the earthworm toxicity test indicated that the tested RHB concentrations can be safely applied to soil without any significant ecotoxicity. In conclusion, this study underscores the potential of RHB as a soil amendment with positive effects on crop growth, highlighting the utilization of agricultural byproducts to enhance soil biological quality and plant growth through biochar application. © 2023 Elsevier Ltd
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