Effects of Wood-derived Biochar Application on Soil Chemical Properties and Growth of Lettuce (Lactuca sativa L.)

Abstract

Biochar is an amendment that can be used for reducing odors, enhancing crop productivity and soil fertility to revitalize the urban agriculture. The objective of this study was to evaluate the effects of biochar from the pyrolysis pine on the soil chemical properties, nutrient uptake, and growth of lettuce plants (Lactuca sativa L.) in an upland field. Lettuce was planted in an silt loam soil amended with four rates of biochar 0 (CFB1), 60 (CFB2), 120 (CFB3), and 240 kg 10a-1 (CFB4) with chemical fertilizer (14.3 kg 10a -1 N, 15.7 kg 10a -1 P2O5, and 12.1 kg 10a -1 K2O), no fertilizer (NF), and animal compost 440 kg 10a -1 with chemical fertilizer (CFC).Leaf number and fresh weight of lettuce plant were higher in CFB4 treatment than in the other treatments.Increasing rates of biochar caused a significant increase in lettuce yield, amount of nutrient uptake, and soil pH. The economically optimum application rate of fertilizer biochar was 200 kg 10a -1 on the basis of the regression curve. The electrical conductivity of the CFB1 soil was significantly higher than in the other treatments, whereas the soil pH was significantly lower in the CFB1 soil than those in the biochar treatments and NF soils. These results showed that biochar amendment increased yield of crops as well as improving soil properties.

Effect of Soil Amendments Derived from Agricultural Biomass to Improve Corn Growth and Soil Fertility in an Upland Field

“…또한 바이오차는 pH, CEC, 비표면적, 부피, 밀도 등의 고유한 특성으로 인해 토양에 적용되었을 때 작물 생육 개선 및 토양 비옥도 증진 효과가 뛰어난 것으 로 알려져 있다 (Woo, 2013;Kim et al, 2020). 이와 같은 측면에서 접근할 때, 농작물 재배 후 버려지는 바이오매스의 바이오차 전환은 폐자원의 재활용 및 친환경 농산물 생산적인 측면에서 농업환경에 긍정적인 영향을 끼칠 수 있는 매 력적인 방법으로 판단된다 (Yi et al, 2019)…”