Biochar can be obtained by using various types of biomass under an oxygen-limited condition. Biochar can be utilized for various applications such as soil improvement, waste management, growth promotion, and adsorption. Wood vinegar is produced by the process of pyrolysis wood biomass and is used as a growth promoter, for soil improvement, and as a feed additive. When wood vinegar is treated on soil, it acts to control soil pH, improve nutrient availability, and alleviate N2O and NH3 volatilization. The objective of this study was to evaluate the effect of biochar and wood vinegar on the growth of perilla and soil quality. The experiment was conducted by using a Wagner pot (1·5,000 a-1) in a glass greenhouse. The biochar was produced by pyrolysis at 450℃ for 30 minutes using rice husk and rice straw. Wood vinegar was diluted to 1 : 500 (v·v-1) and used in this experiement. In the results of a cultivation experiment, co-application of biochar and wood vinegar enhanced the growth of perilla. In particular, rice husk biochar affected the leaves of the perilla, and rice straw biochar influenced the stems of the perilla. In addition, soil quality after treatment with biochar and wood vinegar applied together was highest compared to other units. Therefore, it is anticipated that co-application of biochar and wood vinegar will be more productive and improve soil quality compared to individual utilization of biochar and wood vinegar.
Figures & Tables
Fig. 1. Effect of biochar and wood vinegar addition on stem characteristics of perilla. (A) Fresh weight of stem, (B) node of stem, (C) thickness of stem, (D) length of stem. UT, untreated unit; CT, customary unit; VT, unit treated with wood vinegar; HBT, unit treated with rice husk biochar; SBT, unit treated with rice straw biochar; HBVT, unit treated with rice husk biochar and wood vinegar; SBVT, unit treated with rice straw biochar and wood vinegar. Error bars indicate standard deviations of the means (n = 3). a, b: Different small letters indicate significant difference of the stem characteristics among different treatments, which was determined by Duncan’s multiple range test (p < 0.05).