he present study was conducted to provide basic data for efficient vermicomposting of swine manure by investigatingthe effect of rice hull mix on growth and reproduction of earthworms, amount of earthworm cast produced, and its chemicalcomposition when mixing swine manure in different levels (0 (SRH0), 10 (SRH10), 20 (SRH20), 30 (SRH30), and 40%(SRH40)) with rice hull commonly used as a bulking agent for facilitation in manure composting. The C/N ratio of thefeed was 10.19-13.95 and increased with higher level of rice hull mixed, and the survival rate of earthworms during theexperiment period was 35.2-99.2%. The biomass growth rate of earthworms was significantly higher in the SRH30 andSRH40 treatments than others (p<0.05), and young worms were not found in any treatments, but the number of cocoonswas 7.4 in the SRH40 treatment. The production of earthworm cast and digested amount were higher with the higherlevel of mixed rice hull (p<0.05), and the C/N ratio of cast increased with the mixed rice hull ratio, being significantlyhigher ratio in SRH40 than other treatments (p<0.05). Among heavy metals, the copper content tended to decrease withthe mixed rice hull level. To summarize, the higher level of mixed rice hull was associated with improvement in growth,reproduction, and cast production of earthworms, and 30-40% rice hull mix in particular could result in efficientvermicomposting.

본 시험에서는 가축분의 퇴비화에 수분조절제로서 사용되는 bulking agent 중 일반적으로 많이 사용되고 있는 톱밥을 수준별(0(SSD0), 10(SSD10), 20(SSD20), 30(SSD30) 및 40%(SSD40))로 돈분과 혼합한 다음 지렁이 먹이로 이용하였을 때, 지렁이 생육과 증식에 미치는 영향과 지렁이 분립의 생산량 및 화학적 조성을 조사하여 돈분의 효율적인 vermicomposting의 기초자료로 이용하고자 실시하였다. 그 결과를 요약하면 다음과 같다. 탄질율과 지렁이 생존율은 SSD0구가 각각 10.19와 35.2%이었으나, 톱밥 혼합수준이 증가함에 따라 탄질율은 11.09~16.44로 높아졌으며, 실험기간 동안 지렁이의 생존율은 35.2~100%로 나타났다. 산자수는 SSD40구에서 16.6 마리로 나타났으며, SSD0구 및 톱밥을 30% 이하 첨가구에서는 새끼 지렁이가 나타나지 않았다. 난포수와 난포중은 SSD30과 SSD40구가 각각 23.8~59.8개와 256~660mg의 범위로 나타났다. 지렁이 분립생산과 소화량은 톱밥 혼합수준이 높을수록 높게 나타났으며(p<0.05), 분립의 탄질율은 톱밥 혼합수준이 높을수록 높아져 SSD30과 SSD40구가 다른구 보다 유의하게 높았다(p<0.05). 중금속 함량은 톱밥 혼합수준이 높을수록 낮아지는 경향이었다. 이상의 결과를 종합하면, 돈분에 톱밥 혼합수준이 높을수록 지렁이의 생육과 증식이 향상되었으며, 특히 톱밥 30~40% 혼합 시에 돈분의 효율적인 vermicomposting을 기대할 수 있었다.

The purpose of this study is to compare the sampling methods for monitoring indoles (phenol, p-cresol, indole and skatole) in airs of swine facility. As the collecting methods of indoles in air, Tenax-TA adsorption tube and solid phase microextraction (SPME) were examined. For the preparation of calibration curves of indoles concentrated in Tenax-TA, the standard indoles solutions were spiked in each of Tenax-TA tubes and thermally desorbed (ATD) into a gas chromatograph combined with mass detector (GC/MS). And for the preparation of calibration curves by SPME, indoles in the standard gaseous solution prepared by evaporating the aqueous solution that contained indoles into a polyester sampling bag were extracted with SPME fiber and subsequently analyzed by the GC/MS. Two sampling methods were evaluated for extracting indoles present in swine building environments. Results indicated that the SPME method using Polydimethylsiloxane/ Divinylbenzene (PDMS/DVB) fiber was more effective than Tenax-TA method in extracting indoles. The gas chromatographic analysis showed that the linearities of calibration curves and detection limits were useful for detection of indoles in swine airs. The field tests also showed that considerably different levels of indoles were present in various parts of the swine building.

An agricultural land application of swine slurry is one of the best management practices in Jeju island whose ground water must be protected. So as to study the effect of appling swine slurry on ground water or aquifer, incubation-leaching technique was used by assuming the incubating period of 1, 2, 4, 8, 16, or 32 days, and application rate of 3200.0㎎T-N/ℓ, 820.0㎎T-P/ℓ, and 1887.0㎎K+/ℓin swine slurry. The leachates were collected from the soil columns(PVC 30cmL×5.5cmD) packed 15cm in depth with Gangjeong soil series by washing with 100mL distilled water. The leached components were measured by using Ion chromatography for Cl-, NO3-N, F-, Br-, Na+, K+, Ca2+, and Mg2+, atomic absorption spectrophotometry for Fe and Mn, and UV-Vis spectrophotometry for T-N and T-P. Application of swine slurry in naked soil could influence on the ground water or aquifer by increasing nitrate-nitrogen in leachate with time, or leaching the cations present in soils in accompany with anions because of H+ produced in nitrification. Therefore, careful consideration should be taken about what amount, when, where, and how for protecting ground water system.

돈분뇨 발효액을 이용하여 녹색꽃양배추, 양미나리 관비재배 효과를 검정하고 이때의 적정 액비농도를 구명하고자 돈분뇨 발효액을 5, 10, 25 그리고 50배 희석(Ef. 5, Ef. 10, Ef. 25, Ef. 50)하여 시험한 결과는 다음과 같다. 작물 재배 후 토양분석결과 두 작물 공히 산도 및 칼륨은 액비농도가 진한 Ef. 5 처리구에서 낮았으나, Ef. 25, Ef. 50 처리구에서는 높았다. 반면 전기 전도도, 인산, 유기물함량, 그리고 질산태 질소는 액비농도가 낮은 Ef. 50 처리구에서 낮았으며, Ef. 5 처리구에서는 높아지는 경향이었다. 식물체 분석은 두작물 공히 총 질소는 액비농도가 진해짐에 따라 식물체내의 농도가 증가되었다. 유효 인산은 처리구에 관계없이 큰 차이가 없었다. 생육과 수량을 살펴보면 녹색꽃양배추의 경우 엽장, 엽폭 및 초장은 Ef. 50에서 생육이 가장 좋았다. 화뢰고와 화뢰폭은 액비농도가 낮은 Ef. 25와 Ef. 50 처리구에서 큰 것으로 나타났으며, 화뢰중 또한 무거웠다. 양미나리 는 엽장에서 Ef. 25와 Ef. 50 처리구에서 컸으며 ,수량은 관행대비 Ef. 25와 Ef. 50 처리구에서 각각 2배 증수되었으나, 고농도 처리인 Ef. 5에서 큰 폭으로 감소되었다. 이상의 결과 녹색꽃양배추 및 양미나리의 관비재배시 발효돈분뇨의 희석농도는 25∼50배가 적정한 것으로 나타났다.