보문 : 인삼 경작지 토양생물 분포

홍용 ( Young Hong ),최낙중 ( Nak Jung Choi ),최인영 ( In Young Choi ) 한국환경생물학회 2009 환경생물 : 환경생물학회지 Vol.27 No.3

농생태계 인삼 경작 재배지에서 서식하고 있는 토양생물상을 확인하기 위하여 전라북도 진안 6개 조사구의 인삼 재배 농가에서 조사하였다. 2008년 4월부터 11월까지 채집하여 분류된 미소절지동물은 총 3,101개체였다. 이중 응애류 44.9%, 톡토기 50.1%, 기타 5.0%로 가장 많은 개체수가 출현한 장소는 분변토를 시용한 대조구, 4년근 순으로 나타났으며 월별 밀도소장은 4월, 5월 6월 순이었으며 7월, 8월은 낮은 밀도를 보였다. A/C 비율은 0.90으로 톡토기가 응애보다 비율이 높았다. 토양의 화학적 요인과 개체군 밀도소장과의 유의성은 확인되지 않았다. 토양미생물의 분포 중 방선균은 6월부터 11월까지 월평균 0.3~0.9×10(6) cfu g-1 정도를 나타냈으며 8월과 9월에 가장 높았다. 곰팡이는 각 조사지점별 일정한 증감의 경향을 나타냈으며 8월과 9월에는 1~2배 정도 곰팡이의 수가 감소하는 경향을 보였다. 세균의 분포는 조사기간별 평균 1.1~9.6×10(6) cfu g-1 정도이었으며, 6~8월이 8월 이후보다 세균의 수가 더 많은 것으로 조사되었다. 각 조사지점별 일정한 경향을 보인 형광균의 분포는 조사 시기 초기에는 감지되었으나 7월 이후에는 분포가 나타나지 않았다. To investigate abundance of soil organisms in the ginseng cultivation, we have selected 6 different cultivated lands in Jinan-gun, Jeollabuk-do. The microarthropods were assessed on the basis of 3,101 individuals collected between April and November 2008. The taxonomic composition and abundance of microarthropods were as follows: Acari 44.9%, Collembola 50.1% and others 5.0%. Density increased at the cast and 4 year point, and the population of microarthropods was high in April and May, but low in July and August. Acari/Collembola ratio was approximately 0.90%. There was no correlation between soil factors and microarthropods. The density of soil actinomyces represented a monthly average 0.3~0.9×10(6) cfu g-1, and fungi tended to increase and decrease regularity at each spots, where highest decrease was observed in August and September. The density of bacteria was 1.1~9.6×10(6) cfu g-1 in each period and those in June and August were much higher than after August. The distribution of fluorescent Pseudomonas showed regular tendency in early survey periods but did not appear in significant numbers after July.

광릉시험림 산림토양의 미생물상 및 중형동물상 분포

어진우 ( Jin U Eo ),박병배 ( Byung Bae Park ),박기춘 ( Kee Choon Park ),천정화 ( Jung Wha Chun ) 한국산림과학회 2011 한국산림과학회지 Vol.100 No.4

The aim of this study was to investigate the distribution of soil biota across forest types and soil depths in Gwangneung Experimental Forest. We selected 5 sites, which are 3 deciduous- and 2 coniferous forests. The abundance of microflora in these areas was analyzed by the phospholipid fatty acid (PLFA) indicators, and the density of mesofauna was measured by the abundance of nematodes and microarthropods. The abundance of soil microflora was higher in the A layer than in the B layer based on the PLFA indicators, but there were no differences between deciduous and coniferous forests. Average density of nematodes was higher in the A horizon than in the B horizon. The density of fungivorous nematodes was higher in the deciduous forests. Mean densities of Collembola and Oribatida were 44% and 42% of microarthropods in soil samples, respectively. The results of microbial PLFA indicators were significantly correlated with the density of their consumers, which reflected that the food web in fungi- and bacteria-based soil developed in this forests. This study suggested that the distribution of soil organisms largely separated by soil depths and was slightly affected by the forest type in the Gwangneung Experimental Forest.

Effects of the Applications of Chitin and Chitosan on Soil Organisms

Jinu Eo,Myung-Hyun Kim,Soon-Kun Choi,Hea-Son Bang,Kee-Choon Park 한국토양비료학회 2015 한국토양비료학회지 Vol.48 No.2

Effects of chitin and chitosan treatments on soil microorganisms and the mesofauna were investigated in a microcosm and a fumigated field experiment. Responses of microorganisms were determined using microbial phospholipid fatty acid (PLFA) analysis, whereas responses of the mesofauna were measured in terms of the abundances of nematodes and microarthropods. Soil nitrate concentration increased on the application of chitin. Overall, chitin promoted bacterial and fungal abundance, leading to an increase in abundance of free-living soil nematodes that feed on decomposers. The ratio of saturated to unsaturated fatty acids was highest in the chitin-treated soil. Chitosan had a minimal effect on the abundance of microorganisms; however, it reduced the abundance of collembolans in the microcosm experiment. These results indicate that the application of chitin has beneficial effects on the supply of nutrients and promotion of the abundance of soil organisms.

Effects of the Applications of Chitin and Chitosan on Soil Organisms

Eo, Jinu,Kim, Myung-Hyun,Choi, Soon-Kun,Bang, Hea-Son,Park, Kee-Choon 한국토양비료학회 2015 한국토양비료학회지 Vol.48 No.2

Effects of chitin and chitosan treatments on soil microorganisms and the mesofauna were investigated in a microcosm and a fumigated field experiment. Responses of microorganisms were determined using microbial phospholipid fatty acid (PLFA) analysis, whereas responses of the mesofauna were measured in terms of the abundances of nematodes and microarthropods. Soil nitrate concentration increased on the application of chitin. Overall, chitin promoted bacterial and fungal abundance, leading to an increase in abundance of free-living soil nematodes that feed on decomposers. The ratio of saturated to unsaturated fatty acids was highest in the chitin-treated soil. Chitosan had a minimal effect on the abundance of microorganisms; however, it reduced the abundance of collembolans in the microcosm experiment. These results indicate that the application of chitin has beneficial effects on the supply of nutrients and promotion of the abundance of soil organisms.

Effects of the Applications of Chitin and Chitosan on Soil Organisms

어진우,김명현,최순군,방혜선,박기춘 한국토양비료학회 2015 한국토양비료학회지 Vol.48 No.2

Effects of chitin and chitosan treatments on soil microorganisms and the mesofauna were investigated in a microcosm and a fumigated field experiment. Responses of microorganisms were determined using microbial phospholipid fatty acid (PLFA) analysis, whereas responses of the mesofauna were measured in terms of the abundances of nematodes and microarthropods. Soil nitrate concentration increased on the application of chitin. Overall, chitin promoted bacterial and fungal abundance, leading to an increase in abundance of free-living soil nematodes that feed on decomposers. The ratio of saturated to unsaturated fatty acids was highest in the chitin-treated soil. Chitosan had a minimal effect on the abundance of microorganisms; however, it reduced the abundance of collembolans in the microcosm experiment. These results indicate that the application of chitin has beneficial effects on the supply of nutrients and promotion of the abundance of soil organisms.

점봉산 천연보호림의 토양과 낙엽에서의 토양미소절지동물상

강방훈,이준호 한국생태학회 1997 Journal of Ecology and Environment Vol.20 No.5

Study of population density and biomass of soil microarthropods in soil, herbaceous leaf litter and wood leaf litter was conducted at 4 sites with different flora in Mt. Jumbong, a nature reserve area, in Korea from Aug. 1994 to May 1996. Total 47, 849 individuals of soil microarthropods in soil were collected and identified into 6 different classes, and 16 orders. The composition, densities, and dominant group of soil microarthropods were different among 4 sampling sites. Collembola was the most abundant group with 50.7% at South-facing slope and 50.6% at the North-facing slope. But Acari was the most abundant group with 49.8% at Altitude 900m site and 47.7% at Altitude 1100m site. Two group ranged 87-95% of total individuals. A/C ratio was less than 1.0 at 4 sampling sites during the all sampling seasons. As a result of biomass evaluation, rato of Acari was decreased but ratio of Diplopoda, coleoptera, Araneae, Diptera and Chilopoda was increased. About 70% of total orders and densities were found in less than 5cm soil depth. The composition, densities, and dominant group of soil microarthropods were different among soil, herbaceous litter and wood litter. Collembola was the most abundant group in herbaceous and wood litter. A/C ratio was less than 1.0 in litter during the sampling seasons. As a result of biomass evaluation in litter, ration of Araneae and Collembola was very high, but ratio of Acari was low.

Abundance of soil microarthropods associated with forest fire severityin Samcheok, Korea

Ji Won Kim,정철의 한국응용곤충학회 2008 Journal of Asia-Pacific Entomology Vol.11 No.2

This study investigated the association of soil arthropod abundance from mountain sites where differential forest fire severities had been influenced since April 2000. The post-fire study was conducted from 2005 to 2007 at mountain sites in Imwon-ri and Yang-ri, Samcheok, Korea. Study sites were arranged based on the burn severity and subsequent recovery rate in a year after the fire; ranging from unburned control to severely burned site: Con, T3, C2, T2 and T1. Results from soil sampling revealed that abundance of soil microarthropods was highest in unburned control site, and lowest in most severely burned site, T1. Among the microarthropod groups, abundances of Gamasida, Oribatida and Collembola were significantly different among the sites and showed the abundance ranking of Control N C2 = T3 N T2 N T1. The soil moisture contents and organic matter contents were lower in sites with higher burn severities. But, soil pH values were in reverse trend. The abundances of oribatid mites and collembolans were positively correlated with the soil moisture contents and the organic matter contents but negatively to the soil pH. Abundance of gamasid mites, which are the predators in microarthropod food web was positively correlated to those of their potential preys, oribatid mites and collembolans. This study investigated the association of soil arthropod abundance from mountain sites where differential forest fire severities had been influenced since April 2000. The post-fire study was conducted from 2005 to 2007 at mountain sites in Imwon-ri and Yang-ri, Samcheok, Korea. Study sites were arranged based on the burn severity and subsequent recovery rate in a year after the fire; ranging from unburned control to severely burned site: Con, T3, C2, T2 and T1. Results from soil sampling revealed that abundance of soil microarthropods was highest in unburned control site, and lowest in most severely burned site, T1. Among the microarthropod groups, abundances of Gamasida, Oribatida and Collembola were significantly different among the sites and showed the abundance ranking of Control N C2 = T3 N T2 N T1. The soil moisture contents and organic matter contents were lower in sites with higher burn severities. But, soil pH values were in reverse trend. The abundances of oribatid mites and collembolans were positively correlated with the soil moisture contents and the organic matter contents but negatively to the soil pH. Abundance of gamasid mites, which are the predators in microarthropod food web was positively correlated to those of their potential preys, oribatid mites and collembolans.

유기농법(有機農法)에 관(關)한 연구(硏究) - I. 유기농법(有機農法) 답포장(畓圃場)에서의 절지동물상(節肢動物相) 조사(調査) -

李龍煥 ( Lee Yong Hwan ),高賢寬 ( Goh Hyun Gwan ),黃光男 ( Hwang Kwang Nan ),胡敎純 ( Ho Qyo Soon ) 한국유기농업학회 1998 韓國有機農業學會誌 Vol.6 No.2

Organically cultured rice fields were surveyed to compare the population density and the structure of microarthropod communities between chemically controlled and uncontrolled fields. In rice fields, microarthropod communities were also compared among four treatments based on different input of fertilizer : 1)No fertilizer, 2)Chemical fertilizer (N-P2O5-K20 = 11-7-5kg/10a). 3)Compost(5.000kg/10a). 4) complemented with chemical N. Richness index of microarthropod communities in rice fields was greater in the chemically uncontrolled field than controlled field. Within field, the compost plot had greater value of richness index for microarthropod communities than the non-fertilizer polt. A total of 9 aquatic insects species were identified in the water of organic farming rice field the population density was found to be higher in the compost plot than the other plot. The population of insect pests was found to be high in the late stage of plant whereas the population of insects was high in the early stage of rice plant.

유기농업에 관한 연구-I.유기농법 답포장에서의 절지동물상 조사-

이용환,고현관,황광남,호교순 한국유기농업학회 1998 韓國有機農業學會誌 Vol.6 No.2

Organically cultured rice fields were surveyed to compare the population density and the structure of microarthropod communities between chemically controlled and un-controlled fields. In rice fields, microarthropod communities were also compared among four treatments based on different input of fertilzer : 1)No fertilizer, 2)Chemical fertilizer(N-P2O5-K2O = 11 - 7 - 8 kg/10a, 3) Compost (5,000kg/10a), 4) Compost com-plemented with chemical N. Richness index of microarthropod communities in rice fields was greater in the chemically uncontrolled field than controlled field. Within field. the compost plot had greater value of richness index for microarthopod commuities than the non-fertilizer polt. A total of 9 aquatic insects species were identified in the water of organic farming rice field the population density was found to be higher in the compost plot than the other plot. The population of insect pests was found to be high in the late stage of plant whereas the population of insects was high in the early stage of rice plant.

Distribution of Soil Microarthropod in Pine, Oak anD Bamboo Forests with Special Focus on Gamasid Mites

Keum, Eunsun,Jiwon Kim,Chuleui Jung 한국응용곤충학회 2012 한국응용곤충학회 학술대회논문집 Vol.2012 No.05

Soil microarthropods play important role in soil food web and contribution the nutrient cycling and soil system health. Among diverse taxa, gamasid mite Acari: Gamasida) is considered as a top predator group in soil ecosystem. We compared the soil microarthropod communities focused on gamasid mite species composition. Soil samples were collected Mt. Cheonju in bukmyeon, Changwon-si, Gyeongsangnam-do. On the mountain hill, contagious pine tree (Pinus densiflora) and oak tree (Quercus acutissima) stand were sampled while the bamboo tree (Phyllostachy bambusoides) stand is located in ap. 200m below from the mountain hill. Soil microarthopods abundance was high in bamboo and pine tree stand, but lower in oak tree stand. The dominance order was oribatid mite, collembolan and gamasid mites in pine tree stand, oribatid mite, insects, and gamasid in oak tree stand while in bamboo stand, oribatid mites were out numbered (75%) followed by collembolan. Collected gamasid mites were 146 individuals and 34 species. Species richness and diversity was highest in oak tree stand and lowest in bamboo stand. Cluster analysis showed highest similar in pine-oak stand to bamboo stand. Dominant species were Holaspina dentatus (Parholaspididae) in pine stand, Gamasus fujisanus, Veigaia sp in oak stand, and Gamasus fujisanus in bamboo stand.