Opinion
Soil application of biochar from livestock manure (LM) is an environmentally friendly way to treat excess LM and for enhanced soil carbon sequestration to remove atmosphere CO2. However, high copper, zinc, and salt contents in LM bring concerns on the wide use of LM biochar for soil application. In this study, the copper (Cu), zinc (Zn), and salt contents of LM biochar were estimated using national monitoring database of the heavy metals and salt in the LM composts and the experimental measurement on biochar yield from cow manure including bedding materials. The average of the estimated Zn and salt contents, except of Cu, of LM biochar exceeded the threshold of the national standard. A feasible solution of this problem is increasing the mixing ratio of agroforestry by-products (AB) with low heavy metals and salt content when producing biochar using LM to meet the national standard. Mixed biochar, proposed a new biochar type in the present study, is defined as a biochar made from mixed feedstocks of LM and AB at varying mixing ratios above 30% AB feedstock as the current national standard for LM biochar allows mixing AB below 30% to LM. The mixed biochar may be highly useful as a soil amendment because of the co-advantages from LM (e.g., high nutrient contents) and AB (e.g., high recalcitrance) feedstocks. Therefore, it is expected that the inclusion of the mixed biochar as a new type of biochar in the legal standards will be of help for increased and efficiency production and utilization of biochar in agricultural, forestry, and livestock industry sectors.
Ahn T, Kim D, Lee H, Shin H, Chung E. 2021. A study on the nutrient composition and heavy metal contents in livestock manure compost·liquefied fertilizer. J. Korean Soc. Water Environ. 37:306-314. https://doi.org/10.15681/KSWE.2021.37.4.306
10.1016/j.ensm.2021.02.013Cho JY, Yoon YE, Choe H, Godagedara LT, Lee KA, Kim SC, Kim YN, Lee YB. 2024. Influences of continuous wood-derived biochar application on soil chemical properties and lettuce (Lactuca sativa L.) yield. Korean J. Soil Sci. Fert. 57:96-105. https://doi.org/10.7745/KJSSF.2024.57.2.096
10.7745/KJSSF.2024.57.2.096Guo, M. 2020. The 3R principles for applying biochar to improve soil health. Soil Syst. 4:9. https://doi.org/10.3390/soilsystems4010009
10.3390/soilsystems4010009Han KH, Yun SI, Choi DH, Lee SI. 2024. Net CO2 removal of rice husk biochar as soil amendment depending on energy reuse in the production stage. Korean J. Soil Sci. Fert. 57:130-139. https://doi.org/10.7745/KJSSF.2024.57.2.130
10.7745/KJSSF.2024.57.2.130Han KH, Yun SI, Kwak JH, Lee SI. 2023. A review on international carbon credit certification methodologies for biochar as a soil amendment. Korean J. Soil Sci. Fert. 56:572-594. https://doi.org/10.7745/KJSSF.2023.56.4.572
10.7745/KJSSF.2023.56.4.572IPCC. 2023. Summary for Policymakers. In: Climate Change 2023: Synthesis Report. Contribution of Working Groups I, II and III to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change [Core Writing Team, H. Lee and J. Romero (Eds.)]. IPCC, Geneva, Switzerland, pp. 1-34, doi: 10.59327/IPCC/AR6-9789291691647.001
10.59327/IPCC/AR6-9789291691647.001Ippolito JA, Spokas KA, Novak JM, Lentz RD, Cantrell KB. 2015. Biochar elemental composition and factors influencing nutrient retention. In Biochar for environmental management (pp. 139-163). Routledge.
Ko HJ, Kim KY. 2016. Heavy metals contents and chemical characteristics in compost from animal manures. J. Korean Soc. Occup. Environ. Hyg. 26: 170-177. https://doi.org/10.15269/JKSOEH.2016.26.2.170
10.15269/JKSOEH.2016.26.2.170Lee DW, Lee YN, Jeong YJ, Yun JJ, Shim JH, Jeon SH, Lee YH, Kwon SI, Kim SH. 2023. Effect of biochar derived from greenhouse crop residue on lettuce growth and soil chemical properties. Korean J. Soil Sci. Fert. 56:386-397. https://doi.org/10.7745/KJSSF.2023.56.4.386
10.7745/KJSSF.2023.56.4.386MOE (Ministry of Environment). 2024. Act on the management and use of livestock excreta. Enforcement decree. Attached Table 3. https://www.law.go.kr/
Nam Y, Yong SH, Song KK. 2010. Evaluating quality of fertilizer manufactured (livestock manure compost) with different sources in Korea. Korean J. Soil Sci. Fert. 43: 644-649. UCI (KEPA): I410-ECN-0101-2014-521-000674501
Novak JM, Cantrell KB, Watts DW, Busscher WJ, Johnson MG. 2014. Designing relevant biochars as soil amendments using lignocellulosic-based and manure-based feedstocks. J. soils sediments 14:330-343. https://doi.org/10.1007/s11368-013-0680-8
10.1007/s11368-013-0680-8Rathnayake D, Schmidt HP, Leifeld J, Mayer J, Epper CA, Bucheli TD, Hagemann N. 2023. Biochar from animal manure: A critical assessment on technical feasibility, economic viability, and ecological impact. GCB Bioenergy 15:1078-1104. https://doi.org/10.1111/gcbb.13082
10.1111/gcbb.13082RDA (Rural Development and Administration). 2023. Livestock manure treatment and recycling. Rural Development and Administration Agricultural Technology Guide 109. Jeonju, Korea.
RDA (Rural Development and Administration). 2024. Establishment of Fertilizer legal standards for biochar. https://korea.kr/briefing/pressReleaseView.do?newsId=156623405#goList
- Publisher :Korean Society of Soil Science and Fertilizer
- Publisher(Ko) :한국토양비료학회
- Journal Title :Korean Journal of Soil Science and Fertilizer
- Journal Title(Ko) :한국토양비료학회 학회지
- Volume : 57
- No :4
- Pages :462-469
- Received Date : 2024-10-31
- Revised Date : 2024-11-18
- Accepted Date : 2024-11-18
- DOI :https://doi.org/10.7745/KJSSF.2024.57.4.462
Korean Journal of Soil Science and Fertilizer
