期刊
APPLIED SCIENCES-BASEL
卷 8, 期 11, 页码 -出版社
MDPI
DOI: 10.3390/app8112274
关键词
biochar pellet; modified Hyperbola model; nutrient release; pelletization; pig manure compost
类别
资金
- National Institute of Agricultural Sciences, Rural Development Administration beyond Research Program of Agricultural Science & Technology Development
- Rural Development Administration (RDA), Republic of Korea [PJ013814012018] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
For the recycling of biomass conversion materials, this experiment was conducted to investigate plant nutrient releasing characteristics, and to determine an optimum blended ratio of biochar for producing a biochar pellet based on a column leaching study. The treatments consisted of only pig manure compost (PMC) as a control, pig manure compost pellets (PMCP), and biochar pellets (BCP) blended with biochar and pig manure compost with the following ratios: 9:1, 8:2, 4:6, and 2:8. Results showed that the accumulated amount of ammonium nitrogen (NH4-N) was in order of PMC > PMCP > BCP (2:8) > BCP (4:6) > BCP (8:2) > BCP (9:1) ratios. The highest accumulated amounts of phosphate phosphorus (PO4-P) and potassium (K) were 1953 and 1917 mg L-1 in the PMC and PMCP, but the lowest in the BCP (9:1) were 223 and 1078 mg L-1, respectively. It was shown that the highest accumulated amount of silicon dioxide (SiO2) was 2329 mg L-1 in the BCP (8:2), but the lowest in the PMC was 985 mg L-1. The estimations for accumulated NH4-N, PO4-P, K, and SiO2 releasing amounts in all the treatments were significantly fitted with a modified Hyperbola model. The optimum mixing rate was estimated to be BCP (2:8). Therefore, biochar pellets might be useful in obtaining basic information on slow-release fertilizer for sustainable agriculture.
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