학술논문
유기 및 무기재배 시 토양특성에 따른 채소작물의 기능성물질 함량 변화 / Changes of Functional Ingredients in Vegetable Crops as Affected by Different Soil Properties in Organic and Inorganic Farming Systems
Document Type
Dissertation/ Thesis
Author
Source
Subject
Language
Korean
Abstract
Soil is very important for production of agricultural products, supply of resources and health of human. Due to the excessive uses of inorganic fertilizer and agricultural pesticides, safety of agricultural products is emphasized and various functional ingredients generated during the cultivation of organic products are related to the characteristics of crop. Furthermore, because the crop is closely related to human's dietary habits, it may show very important actions and effects for human health. Therefore, this study was conducted to investigate physical and chemical properties of soils and concentrations of inorganic elements and functional ingredients (selected phytochemicals) in Chinese cabbage (CC), lettuce (LE), chicory (CR), and kale (KL) as applied by ecofriendly-developed organic fertilizer (EDOF), organic by-product fertilizer (OBF), and inorganic fertilizer (IF). Physical properties of the soils did not show a little difference after harvesting the vegetable crops. However, soil pH, electrical conductivity (EC), soil organic matter (SOM), total nitrogen (T-N), available phosphorus (avail. P2O5,), and exchangeable basic cations (exch. K, Ca, Mg, and Na) increased in most of the plots, whereas cation exchange capacity (CEC) of the soils decreased. In particular, EC value and exch. Ca, Mg, and Na concentrations increased in the plots of EDOF and OBF applications. When determining the concentrations of the inorganic elements in aerial and subterranean parts of the vegetable crops, nitrogen concentration was highest with application of IF while P, K, Ca, Mg, and Na concentrations were higher with OBF application than with other treatments. In addition, transport index (TI) values of the inorganic elements in CC, LE, and CR were higher with OBF application, but TI values of the inorganic elements in KL did not show any specific trend with applications of the different fertilizers. Also, the concentrations of the phytochemicals were higher in CC, LE, and CR with EDOP treatment than with other treatments, but the phytochemical concentrations in KL showed similar between EDOP and IF treatment plots. The correlations between inorganic elements and phytochenicals in the vegetable crops were investigated. The concentrations of all the phytochemicals were positively correlated (p