Comparison of Physicochemical and Biological Soil Properties in Organic and Conventional Upland Fields

Abstract

Application of organic farming system has been increased recently but change of soil properties due to organic farming system has not been thoroughly studied. The main purpose of this study was to compare physicochemical and biological soil properties between conventional and organic farming system and to identify the most affected soil parameters for two different farming system. Soil samples were collected from upland fields that have been using conventional or organic farming system for over five years. Then, physicochemical and biological soil properties were determined, including bulk density, porosity, pH, electrical conductivity (EC), cation exchange capacity (CEC), soil organic matter, total nitrogen (T-N), available phosphorus, soil respiration, and soil enzyme activities. For soil physical perspective, soils from organic farming system had lower bulk density and higher porosity values than conventional farming system. This result indicate that organic farming system had beneficial effect on soil physical properties. In case of soil chemical properties, the available phosphorus content in soil from conventional farming system was higher than in organic farming system probably due to the continuous use of inorganic fertilizers containing phosphorus in the arable area. For soil biological properties, β-glucosidase and phosphatase activities were higher under conventionally managed soils than organic farming system. Overall, physicochemical and biological soil properties can be varied depending on differently managed farming system and long terms of monitoring is necessary for understanding the change of soil properties between organic and conventional farming system.

Comparative Analysis of Microbial Community Characteristic of Acidic and Neutral Soils in Korean Orchards

“…담수 환경인 우리나라 벼논은 혐기 조건에서 많이 발견되는 Chloroflexota의 상대풍부도 가 높았고 밭, 과수원, 시설재배지에 비해 미생물 네트워크가 더 많이 형성되는 것으로 밝혀졌다 (Petriglieri et al, 2018;Lee et al, 2020). 토양 유형 뿐만 아니라 토양 관리 방법에 따라 달라지는 토양 화학성은 미생물 군집 변화에 상 당한 영향을 미친다고 잘 알려져 있다 (Aziz et al, 2013;Bartram et al, 2014;Yoon et al, 2022;Kim et al, 2023). 이 전 연구들은 pH, 전기 전도도, 유기물 함량, 가용성 인산 등 변화에 따라 미생물 군집 구성이 달라지는 것을 확인하였 고 (Chodak et al, 2015;Kim et al, 2016;Xu et al, 2020), 특히 pH는 다른 이화학성에 비해 미생물 군집 구조와 다양 성에 큰 영향을 미친다 (Lauber et al, 2009;Rousk et al, 2010;Kim et al, 2016;Lee et al, 2020).…”