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돈분액비의 시용시기가 녹비작물의 생육과 양분생산에 미치는 영향
강세원,장광진,구현정,최장남,Kang, Se-Won,Chang, Kwang-Jin,Koo, Hyun-Jung,Choi, Jang-Nam 국립한국농수산대학교 교육개발센터 2016 현장농업연구지 = Journal of practical agricultural resear Vol.18 No.1
In order to obtain the optimum application time of liquid pig manure (LPM) for growth and nutrient contents of green manure crops (GMCs), the growth and nutrient characteristics of GMCs were evaluated under different application times of LPM in pot experiment. GMCs were sown in Sept. 1, 2012. LPM was treated in soil surface at 15 days before sowing (15DBS), at 0 days after sowing (ASD) and at 25 days after sowing (25DAS). At 60 days after seeding, plant heights of barley and hairy vetch were higher in 15DBS treatment than those in other treatments. Biomass of barley was higher in the order of 15DBS (50.2g plant<sup>-1</sup>) > ASD (49.8g plant<sup>-1</sup>) > 25DAS (48.5g plant<sup>-1</sup>) > control treatment (37.5g plant<sup>-1</sup>). Biomass of hairy vetch in 15DBS treatment was higher than that in other treatments. Nutrient contents of barley and hairy vetch were not different regardless of LPM application times. On the other hand, the amounts of nutrients uptake in 15DBS treatment were higher than those in other treatments. Therefore, in considering growth status and nutrient contributions of GMC, the optimum application time of LPM was 15DBS.
강세원,한인규,박재환 ( Se W . Kang,In K . Han,Jae H . Park ) 한국축산학회 1983 한국축산학회지 Vol.25 No.4
A battery trial with 280 broiler chicks of Hi-sex strain was conducted for 8 weeks to examine the growth promoting effect of commercial anticoccidials for broiler chicks. A total of 6 treatments which consisted of 1) control 2) anticoccidials A 3) anticoccidials B 4) anticoccidials C 5) anticoccidials A (0-4 weeks)-C (5-8 weeks) 6) anticoccidials B (0-4 weeks)-C (5-8 weeks) were employed with 4 replicates of 10 birds each. The criteria used in this study were growth rate, feed intake, feed conversion rate, mortality and nutrient utilizability. The results obtained are summarized as follows: 1. It was found that all of the birds fed anticoccidials gained the body weight more rapidly than those fed non-anticoccidials during the whole period (p$lt;0.05). The growth promoting effect of 3 anticoccidials examined were in order of A, B and C. But it should be mentioned that growth promoting effect of anticoccidials C was more remarkable during the finishing period than starting period. The total body gain of A-C and BC were 1955.68 and 1902.68, respectively, which were similar to those of anticoccidial C (1943.1g). Also the feed intake of the anticoccidials treated groups was increased in proportion to its body gain. However, there were no statistical differences in feed conversion rate among the treatments. 2. Anticoccidials did not exert any effect on the utilizabilities of nutrient examined. 3. There were no statistical differences in mortality among the treatments and the mortality due to coccidiosis did not occur in all treatments. Based upon these results it may be concluded that growth promoting effect of anticoccidials was remarkable as compared to control, and that the extent of growth promoting effect of each anticoccidials was various.
Stenorol 이 브로일러의 콕시듐 치료에 미치는 영향
강세원,한인규,장두환,박재환 ( Se W . Kang,In K . Han,Du H . Jang,Jae H . Park ) 한국축산학회 1983 한국축산학회지 Vol.25 No.6
In order to compare the anticoccidial efficacy of Stenorol with those of Coxistac and Avatec, a shuttle program consisting of Avatec(0-4weeks)-Stenorol(5-8weeks), Coxistac(0-4weeks)-Stenorol(5-8weeks), Stenorol (0-4weeks)-Stenorol(5-8weeks) and unmedicated group was conducted for 8 weeks with 3-day old commercial type broiler chicks. The birds were artificially medicated with the mixed species of Eimeria at 21-day of age. The results obtained from this experiment were summarized as follows: 1. All groups medicated coccidiostats improved body weight gain and feed efficiency significantly(p$lt;0.05) as compared to unmedicated group. It was found that the group medicated with Coxcistic-Stenorol showed better body weight gain and feed efficiency. 2. The mortality due to coccidiosis did not occur in all treatment groups for the entire experimental period. 3. The lesion score was 0.84 for Coxistac group, 1.44 for Stenorol group, 1.56 for Avatec group and 2.56 for control group, respectively. 4. The group medicated with Coxistac excreted for less oocysts than other groups. According to the above results, Steno.rol showed similar results to those of Coxistac and Avatec in anticoccidial efficacy, but growing performance of broiler chicks was in order of Coxistac, Avatec and. Stenorol. Moreover, even when the Coxistac and Avatec which were fed to birds during the grower period (0-4 weeks) were switched by Stenorol during the finisher period (5-8 weeks), above results were in same tendency.
녹비작물과 돈분액비의 혼용재배가 벼 생육에 미치는 효과
강세원(Se-Won Kang),서동철(Dong-Cheol Seo),한종학(Jong-Hak Han),서영진(Young-Jin Seo),이상규(Sang-Gyu Lee),최익원(Ik-Won Choi),전원태(Weon-Tai Jeon),강위금(Ui-Gum Kang),허종수(Jong-Soo Heo),조주식(Ju-Sik Cho) 한국토양비료학회 2011 한국토양비료학회지 Vol.44 No.6
본 실험은 화학비료를 절감하기 위한 방안으로 녹비작물 (자운영, 라이그라스)과 돈분액비 혼용이 벼의 생육에 미치는 효과를 조사하고자 하였다. 녹비작물의 biomass 생산량은 자운영 (site 1)의 경우 APLM 100 처리구에서 182 kg 10a<SUP>-1</SUP>으로 가장 많았고, 라이그라스 (site 2)의 경우 LPLM 100 처리구에서 978 kg 10a<SUP>-1</SUP>으로 가장 많았다. Site 1 및 2에서 녹비작물의 유무와 돈분액비 투입량에 따른 수확기 벼의 부위별 T-N, T-P, K₂O, CaO, MgO 및 SiO₂ 함량은 전반적으로 큰 차이 없이 비슷한 경향이었다. Site 1 및 2에서 수확기 토양의 OM, T-N 및 Avail. P₂O5 함량은 공시토양의 OM, T-N 및 Avail. P₂O5 함량에 비해 약간 증가하였으며, 처리별 무기성분 함량은 전반적으로 돈분액비 투입량이 증가될 수록 높아지는 경향이었다. 수확기 벼의 1,000립중은 site 1 및 2에서 각각 APLM 100 및 LPLM 100 처리구에서 가장 많았다. 수확기 벼의 수량은 site 1의 경우 APLM 100 처리구에서 636 kg 10a<SUP>-1</SUP>로 control 처리구에 비해 약 10%가 증수 되었고, site 2의 경우 LPLM 100 처리구에서 775 kg 10a<SUP>-1</SUP>으로 control 처리구에 비해 약 12%가 증수되었다. 따라서 녹비작물과 돈분액비의 혼용재배는 벼의 증수효과가 우수하여 화학비료를 절감할 수 있을 것으로 판단된다. The effect of mixed cultivation with green manure crops and liquid pig manure on rice growth was investigated. Field experiment in site 1 (Astragalus sinicus L.) and site 2 (Lolium multiflorum Lam.) were designed with control (non-green manure crop), PLM 100 (non-green manure crop + liquid pig manure 100%), A(L)PLM 0 (green manure crop + PLM 0%), A(L)PLM 50 (green manure crop + PLM 50%), A(L)PLM 75 (green manure crop + PLM 75%), and A(L)PLM 100 (green manure crop + PLM 100%). The results of 1,000 grain in rice plant were in the order of APLM 100 ?APLM 75 ≒ PLM 100 ≒ APLM 0 ≒ APLM 50 ≒ control for site 1 and LPLM 100 ?LPLM 75 = LPLM 50 = PLM 100 ?LPLM 0 ≒ control for site 2. The yields of rice in site 1 and site 2 were 636 kg 10a<SUP>-1</SUP> (increasing yield 10%) for APLM 100 and 775 kg 10a<SUP>-1</SUP> (increasing yield 12%) for LPLM 100, respectively.
한.중 FTA 발효 이후 무역량 변화와 주요 품목의 경쟁력에 관한 연구
강세원(Se-Won Kang),조일림(Yi-Lin Zhao),라공우(Kong-Woo La) 한국통상정보학회 2021 통상정보연구 Vol.23 No.4
본 연구에서는 한중 FTA가 체결 발효된 2015년 시점을 기준으로 한국의 주요 대중 수출 품목의 경쟁력이 어떻게 변화하였는지를 분석하는 것이다. 이를 위해 한국의 대중 20대 수출 품목을 HS 4단위로 분류하여 2011년부터 2020년까지 RCA와 SRCA 및 TSI를 산출하여 경쟁력을 분석하였다. 분석한 결과 한국 대 중국의 품목별 SRCA지수를 보면, 역시 2015년에는 HS8471 품목 하나만 음수(-)로 나타났으나, 2020년에는 4개 품목으로 나타나 한중 FTA이후 경쟁력이 약화된 것을 알 수 있다. 그리고 2015년 대비 경쟁력 약화 부분에서는 - 1 < TSI < 0, 사이에 위치한 품목은 7개 품목으로 나타났으며, 특히 한․중 FTA이후 수출특화에서 수입특화로 전환된 품목은 5개 품목으로 나타났다. 결론적으로 FTA발효 이후 경쟁력이 급격하게 낮아진 산업에 대해서는 정책 당국의 지원정책과 기업의 해외 거래선의 다변화 등의 내부적인 대응 전략이 필요하다고 본다. This study analyzes how the competitiveness of Korea s major export items to China has changed as of 2015, when the Korea-China FTA took effect. For this study, Korea s top 20 export items to China were classified into 4 HS units, and RCA, SRCA, and TSI were calculated from 2011 to 2020 to analyze competitiveness. As a result of the analysis, looking at the SRCA index for each item of Korea versus China, only one HS8471 item was negative (-) in 2015, but there were 4 items in 2020, indicating that competitiveness has weakened after the Korea-China FTA. And after the Korea-China FTA, 5 items were converted from export-specialized to import-specialized. In conclusion, for industries whose competitiveness has rapidly decreased after the entry into force of the FTA, it is necessary to develop a response strategy such as support policies from the policy authorities and diversification of overseas business partners.
연구보문 : 수질환경 ; 비점오염원 처리를 위한 자유수면형 인공습지에서 수생식물의 영양염류 흡수특성 평가
강세원 ( Se Won Kang ),서동철 ( Dong Cheol Seo ),최익원 ( Ik Won Choi ),이준배 ( Jun Bae Lee ),임병진 ( Byung Jin Lim ),박종환 ( Jong Hwan Park ),김갑순 ( Kap Soon Kim ),김상돈 ( Sang Don Kim ),허종수 ( Jong Soo Heo ),조주식 ( Ju 한국환경농학회 2011 한국환경농학회지 Vol.30 No.3
BACKGROUND: Generally, water plants may play an important role in nutrients(N, P) removal in constructed wetlands(CWs). Previous studies considered nutrients uptake by water plants in various CWs for treating point source pollution. On the other hand, few studies considered nutrients uptake by water plants in free water surface(FWS) CWs for treating non-point source pollution. METHODS AND RESULTS: To investigate characteristics of nutrient uptake by water plants in FWS CWs, dry weights, nutrients content and nutrients uptake by water plants were investigated from April, 2008 to October, 2008. Dominance plants were Phragmites japonica STEUD (PHRJA), Nymphaea tetragona ANGUSTA(NTMTE), Typha orientalis PRESL(TYHOR), Phragmites communis TRINIUS(PHRCO) and Zizanis latifolia TURCZ(ZIZLA) in FWS CWs. The dry weights of water plants in August were higher in the order of TYHOR(54.27 g/plant) > PHRJA(44.30 g/plant) ≥ PHRCO(39.60 g/plant) ≥ ZIZLA(37.80 g/plant) ≒ NTMTE(36.75 g/plant). The T-N and T-P contents by water plants were not significantly differences regardless of cultivation period. The maximum amount of T-N uptake by water plants in August were 773 mg/plant for PHRJA, 625 mg/plant for NTMTE, 1206 mg/plant for TYHOR, 754 mg/plant for PHRCO and 768 mg/plant for ZIZLA. The maximum amounts of T-P uptake by PHRJA, NTMTE, TYHOR, PHRCO and ZIZLA were 397, 177, 411, 261 and 229 mg/plant in August, respectively. CONCLUSION(s): The results of this study suggest that optimum water plant was Typha orientalis PRESL in free water surface constructed wetlands.