p-ISSN 1225-3537e-ISSN 2233-4173
Je-Min Park, Mi-Yun An, Hyun-Jin Song, Ro-Young Lee, Soon-Ho Kwon, In-Chol Choi, Byeong-Hoon Yang / Korean Journal of Environmental Agriculture / 2025 / v.44, 1-11
Abstract
This study investigates the morphological characteristics of the new variety of Schisandra chinensis ’Geumbitsaeul’, developed for cultivation in forest farming applications. To determine whether distinct traits of S. chinensis ‘Geumbitsaeul’ were consistently distinguishable from the control variety, two cultivation trials were conducted over two years. As a result, S. chinensis ‘Geumbitsaeul’ consistently exhibited traits such as shorter and wider tepals and a higher number of aggregate fruits compared to the control variety. In qualitative evaluation, compared to control species, S. chinensis ‘Geumbitsaeul’ had no anthocyanin pigmentation on the petiole, no intraterminal pigmentation, and there was a clear difference in yellow fruit color. As a result of phenotypic confirmation, it is judged to be a variety with low pigment content. These characteristics enhance the ornamental and industrial value of S. chinensis ‘Geumbitsaeul’ positioning it as a valuable addition to the diversification of S. chinensis varieties. The purpose is to provide basic data needed to foster new forest varieties and establish S. chinensis standard varieties, and to contribute to expanding the diversity of varieties.
Jae-In Lee, Kwang-Sik Kang, Eun-Seo Park, Woo-Sik Park, Young-Joon Choi, Han-Ju Jeong, Min-Su Kang, Tae-Yong Yun, Hyeok-Woo Nam / Korean Journal of Environmental Agriculture / 2025 / v.44, 12-20
Fire blight is a pathogen that is prohibited from being introduced, such as causing the entire tree to wither. It is virtually impossible to completely eradicate and treat it once it breaks out. Therefore, because it causes economic and psychological losses to farms, this study was conducted to develop more effective pesticide by supplementing the pesticides that have been previously used. oxolinic acid (10%) SL, which is effective in controlling pathogens, was selected as the target pesticide. The spraying method was changed to a method that has a more direct effect, and the apple and pear trees were trunk-injected right before flowering. samples were collected and the pretreatment method and instrumental analysis method were established. Based on the analysis results, there was a possibility of developing a new pesticide even within the limited experimental method. However, it is difficult to apply it to commercial orchards, so further review is necessary.
Chaemin Sim, Jieun Lim, Youri Yang / Korean Journal of Environmental Agriculture / 2025 / v.44, 21-28
Soil can be a natural reservoir of antibiotic-resistant bacteria (ARB) and is capable of transferring them to the environment. The spreading of ARB can be affected by geographical factors such as land type and altitude. This study investigated the occurrence of antibiotic-resistant bacteria from agricultural soils in five regions of Gangwon State, South Korea, focusing on two commonly used agricultural antibiotics, streptomycin (ST) and oxytetracycline (OTC). Soil samples were collected from two plane land fields (Cheorwon, Chuncheon) and three high land fields (Gangneung, Jeongseon, Taebaek) for isolation of ARB against ST and OTC. Thirty-four bacterial strains were isolated, showing resistance to ST and OTC. Examination of cross-resistance between the two antibiotics found that some strains resistant to ST also exhibited reduced susceptibility to OTC, and vice versa. Remarkably, the bacterial strains, CW1 and TB7, showed the highest cross-resistance between the two antibiotics and they were from either plane land fields or high land fields. The strains were identified as diverse genera such as Pseudomonas sp., Lysobacter sp., Telluria sp., Pseudarthrobacter sp., Stenotrophomonas sp., Microbacterium sp., and Flavobacterium sp. The results in this study infer the potential for the spread of ARB or related genes from high land in sloped fields. Taken together, it should be emphasized that a need for careful monitoring of the occurrence of ARB in different types of fields to protect the environment as well as sustainable agriculture by preventing the further spread of these bacteria and related antibiotic-resistant genes in the environment.
Sung-Chang Hong, Min-Ji Lee, Byung-Wook Oh, Chang-muk Lee / Korean Journal of Environmental Agriculture / 2025 / v.44, 29-36
Nitrogen fertilizers must be applied repeatedly during crop cultivation. The agricultural sector has set a goal of reducing nitrogen fertilizer usage to 23%, from 2022 to 115kg/ha, 2030. Currently, fertilizer is spread on the farming fields and then mixed with the field soil using rotary operations. Deep fertilization treatment entailed injecting basal fertilizer 25-30cm deep into the soil using a deep fertilization device attached to a tractor. For onions, added fertilization using nitrogen fertilizer was omitted once out of three times, and for wheat, once out of two times. For forage corn, added fertilization was reduced by 50%. After crop cultivation, the yield of the deep fertilization treatment significantly increased by 52% for onion, 26% for wheat, and 29% for forage corn, respectively, compared to the conventional surface fertilization treatment. Therefore, deep fertilization could reduce the amount of nitrogen fertilizer used as fertilization by 22% for onions, 25% for wheat, and 25% for forage corn. It was concluded that deep fertilization of basal fertilizer in cultivating onions, wheat, and forage corn can reduce the amount of nitrogen fertilizer used to increase production. The deep fertilization technology is expected to be a low-carbon agricultural technology.
