호남평야지 청보리-벼 이모작에서 벼 폿트묘 적정 재식밀도 구명

강신구 ( Shin Gu Kang ),김영두 ( Young Doo Kim ),구본일 ( Bon Il Ku ),상완규 ( Wan Gyu Sang ),이민희 ( Min Hee Lee ),박홍규 ( Hong Kyu Park ),이점호 ( Jeom Ho Lee ) 전북대학교 농업과학기술연구소 2014 농업생명과학연구 Vol.45 No.2

본 시험은 호남평야지에서 청보리-벼 이모작 재배시 벼폿트묘에 알맞은 적정 재식밀도를 구명하기 위하여 수행하였다. 관행산파묘와 폿트묘를 이용하여 재식밀도별 생육상황을 보면 경직경은 관계없이 관행보다 폿트묘에서 굵었고, 출수기는 폿트묘 이앙구에서 50주~70주/3.3m2가 관행보다 2일, 80주/3.3m2가 관행보다 1일 정도 빨랐다. 간장은 관행산파묘보다 폿트묘의 간장이 더 컸고, 재식밀도별로는 재식밀도가 낮을수록 간장이 더 크게 나타났으나, 이삭길이는 재식밀도별로 유의한 차이를 보이지 않았다. 이삭수는 재식밀도가 높아질수록 단위면적당 이삭수가 많아지는 경향이었다. 등숙비율 및 천립중은 육묘방법 및 재식밀도 사이에 유의한 차이가 없었다. 백미수량은 재식밀도별로 보면 폿트묘 60주/3.3m2가 543kg/10a로 관행 518kg/10a 보다5% 증수하였다. 완전미 비율은 폿트묘 80주/3.3m2 이앙구에서 다소 낮았고, 육묘방법간에 차이는 없었으나 재식밀도 간에는 다소 차이가 있었던 반면, 아밀로스 함량은 재식밀도 간에 유의한 차이가 없었다. This experiment was carried out to investigate the optimum planting density for rice pot seedling cultivation by machine transplanting in forage barley-rice double cropping system in Honam plain area. Field experiment was conducted at research field of NICS in Iksan in 2012 and 2013. Rice seedling of Chinnongbyeo (mid-late maturing) was raised for 30 days in pot-seedling tray (448 holes) and conventional tray, and transplanted on June 10 in both years. Planting densities of pot seedling were 50, 60, 70, and 80 hills/3.3m2. Conventional tray seedling was transplanted as control at a planting density of 80 hills/3.3m2 on June 10. Tiller number per m was increased as planting density increasing, but stem diameter was decreased. Heading dates of pot seedling plots were August 19 except 80 hills/3.3m2, which were 2 days earlier than the control. Culm length, number of panicle, panicle length, and ripening grain ratio were higher in pot seedling compared to the controls, but 1000-grain weight showed no significant difference. Milled rice yield was significantly different between planting densities. The highest grain yield was 543kg/10a in 60 hills/3.3m2 of pot seedling, and it was 5% higher than its control (518kg/10a). Head rice ratios of pot seedlings and the controls were not significantly different in both transplanting dates.

남부평야지 이모작에서 벼 무논점파 재배시 파종기에 따른 생육 및 수량

강신구 ( Shin Gu Kang ),최민규 ( Min Kyu Choi ),구본일 ( Bon Il Ku ),상완규 ( Wan Gyu Sang ),이민희 ( Min Hee Lee ),김영두 ( Young Doo Kim ),박홍규 ( Hong Kyu Park ),최원영 ( Won Young Choi ),김보경 ( Bo Kyeong Kim ),이점호 ( Jeom 한국국제농업개발학회 2014 韓國國際農業開發學會誌 Vol.26 No.3

Field experiments were conducted to identify the safe seeding date for rice wet hill direct seeding on puddled paddy surface after barley or wheat cultivation in Honam plain area. Two Korean bred-cultivars, Unkwangbyeo (early maturing) and Dongjin2 (mid-late maturing), were seeded 4 times by 10-day interval from May 25 to June 25 in 2012 and 2013. Seedling stand decreased as seeded later, but it was in optimal range in all the seeding dates. Heading date of the last seeding of Unkwangbyeo on June 25 was August 28, and the last seeding of Dongjing2 on June 25 was September 2, which was within the limit date of heading (September 3). Panicle numbers per m2 were not significantly different until the third seeding on June 15, but it decreased in the seeding date on June 25. Number of grains per panicle decreased as seeded later. Milled rice yield and head rice ratio was also decreased as seeded later, and were the lowest in the last seeding date on June 25. Protein content of Unkwangbyeo was similar regardless of seeding dates, but it increased at later seeding dates in Dongjin2. According to the above results, the seeding date would be recommended within June 25 for Unkwangbyeo, June 15 for Dongjin2 in wet hill direct seeding on puddled paddy in Honam double cropping area.

연구보문 : 탄자니아 잔지바르에 도입한 개량된 옥수수 자유방임품종의 적응시험

강신구 ( Shin Gu Kang ),유수프주마하미스 ( Yusuphu Juma Hamis ),마리암주마압둘라 ( Mariam Juma Abdula ),김순권 ( Soon Kwon Kim ),박태선 ( Tae Seon Park ),이경보 ( Kyeong Bo Lee ),최민규 ( Min Kyu Choi ),구본일 ( Bon Il Ku ),박홍규 ( Hong 한국국제농업개발학회 2011 韓國國際農業開發學會誌 Vol.23 No.1

To support maize seed program in Zanzibar, a semi-autonomous state of Tanzania, four improved open-pollinated maize varieties (OPVs) were introduced and tested at Kizimbani Agricultural Research Station (KARS) in 2006. In the different environment from Tanzania mainland, Tuxpeno-1 showed best performance with 3.9 t ha-1, followed by Staha (3.8 t ha-1), Situka (3.0 t ha-1), and TMV-1 (2.0 t ha-1). These results are over the average yield of Zanizbar, but less or more than the potential yield by 76%, 72%, 67%, 47%, respectively. It was understood that the lower yield was primarily due to less fertile soil. General growth of TMV-1 was poor, and Situka was revealed to be weak to pests and diseases in the island, so they were not recommended to farmers. KARS started to conduct seed multiplication and supply as a following up program for farmers.

연구보문 : 자연과학; 벼 재배양식간 간단관개에 따른 물 절약 효과

강신구 ( Shin Gu Kang ),구본일 ( Bon Il Ku ),박홍규 ( Hong Kyu Park ),이경보 ( Kyeong Bo Lee ),최민규 ( Min Kyu Choi ),상완규 ( Wan Gyu Sang ),김영두 ( Young Doo Kim ),김보경 ( Bo Kyeong Kim ) 한국국제농업개발학회 2013 韓國國際農業開發學會誌 Vol.25 No.3

To verify the effect of intermittent irrigation on water saving, two irrigation regimes, intermittent irrigation (II) and conventional irrigation (CI), were applied to machine transplanting (TP) and wet-hill-seeding (WHS) in 2009 and 2010. In intermittent irrigation plots, alternate flooding was applied from 20 days after transplanting and from 30 days after direct seeding. Conventional irrigation was imposed by continuous flooding including broken irrigation. The amount of irrigation water in II plots was 22% and 24% lower than that in CI plots of machine transplanting and wet-hill-seeding cultivation, respectively. Water productivity of intermittent irrigation plots ranged from 0.73 and 0.79. There were no significant different in plant growth and milled rice yield between the irrigation methods.

이달의 x-선 : 기관지 선종과 유사한 종양형 기관지 결핵 1예

강신구 ( Sin Gu Kang ),홍애라 ( Ae Ra Hong ),김정주 ( Chong Ju Kim ),송광선 ( Kwang Seon Song ),용석중 ( Suk Joong Yong ),신계철 ( Kye Chul Shin ) 대한결핵 및 호흡기학회 1996 Tuberculosis and Respiratory Diseases Vol.43 No.5

등숙기의 차광 처리에 의한 광합성능 및 쌀 수량 변화

이민희(Min Hee Lee),강신구(Shin-Gu Kang),상완규(Wan-Gyu Sang),구본일(Bon-Il Ku),김영두(Young-Doo Kim),박홍규(Hong-Kyu Park),이점호(Jeom-Ho Lee) 충남대학교 농업과학연구소 2014 농업과학연구 Vol.41 No.4

최근 육성된 고품질 벼 품종인 보람찬, 호품 및 호농을 공시하여 질소 시비량(9, 18 kg/10a) 및 출수 직후 차광처리(50, 70%)에 의한 등숙기 일조부족이 광합성 특성 변화와 수량 및 수량구성형질 등에 미치는 영향을 검토한 결과를 요약하면 다음과 같다. 1. 등숙기 차광처리에 의해 Fv/Fm 및 SPAD값은 차광률이 높을수록 그 감소율이 적었으며, 질소 시비량을 증가에 따른 유의적인 변화는 없었다. 다른 품종과 달리 호농의 경우 18 kg 처리시 자연광에서 자란 시료에서도 감소율이 완만하게 나타났다. 2. 등숙기 차광처리에 의해 천립중과 수량은 차광에 따라 감소하였고, 차광률에 따라 더 높은 감소율을 보였다. 천립중은 세 품종 중 보람찬이 가장 많이 감소하는 경향을 보였다. 차광 70% 처리시 질소 시비량의 증수에 따라서 감소율이 더 급격히 나타나 등숙기 일조부족에 질소질 비료의 추가시용은 비효율적임을 알 수 있었다. 3. 등숙기 차광처리시 백미 단백질 함량은 증가하였고 50% 차광 보다 70% 차광에서 높았으며, 호농이 보람찬 과 호품에 비해 단백질 함량의 변화가 적었다. 4. 등숙기 차광처리시 아밀로스 함량 변화는 감소하는 경향을 보였으며, 호농이 보람찬과 호품에 비해 변화가 적었다. 5. 등숙기 차광처리에 따른 쌀의 품위 분석 결과 보람찬과 호품은 차광에 의해 완전립 비율이 차광율 70%일 때 64.8-70.9%로 크게 감소하였는데 이는 분상질립의 증가로 인한 것으로 판단된다. Light intensity is one of the most important requirements for plant growth, affecting growth, development, survival, and crop productivity. Sunlight is the main energy source on Earth which is energy used by photosynthesis to convert light energy to chemical energy. In this study, the light use efficiency and photosynthetic characteristics of high-quality rice cultivars were evaluated after shading on ripening stage. For the study, we treated of three levels of shade (0, 50 and 70%) on rice at ripening stage and two levels of nitrogen (9 and 18 kg/10a) used three high yielding rice cultivars, such as Boramchan, Hopum, and Honong. The shade was given for the respective plots from heading up to harvesting. We were performed to determine growth survey, SPAD and chlorophyll fluorescence every 10 days interval after shading on ripening stage. At harvest stage, grain yield and yield components were determined. Results of analysis of the results representing the maximum photosynthetic efficiency of PSII, Fv/Fm, and SPAD were decreased by depending on the time at full sunlight. But shade treatments were not changed and a significant difference among cultivars did not appear. Compared with the full sunlight, shade treatments significantly delayed ripening rate and decreased rice quality of cultivated rice. Therefore, rice yield, can be reduced in proportion to the shading density is apparent, the rate of decrease was not observed difference between varieties, when protected from light 70%, and decreased to less than 50%. The adverse effects of low light intensity on the yield and yield components were not able to significantly minimize by the nitrogen level.

고품질벼 품종의 등숙기 차광에 의한 광합성 물질 변화

이민희 ( Min Hee Lee ),강신구 ( Shin Gu Kang ),상완규 ( Wan Gyu Sang ),구본일 ( Bon Il Ku ),김영두 ( Young Doo Kim ),박홍규 ( Hong Kyu Park ),이점호 ( Jeom Ho Lee ) 전북대학교 농업과학기술연구소 2014 농업생명과학연구 Vol.45 No.2

최근 육성된 고품질 벼 품종인 보람찬, 호품 및 호농을 공시하여 출수 직후 차광 처리(50, 70%)에 의한 등숙기 일조부족이 광합성능 및 관련 물질 변화와 수량에 미치는 영향을 검토한 결과를 요약하면 다음과 같다. 등숙기 Fv/Fm값은 자연광에서 자란 경우 25일을 기점으로 감소하기 시작하여 55일에는 보람찬이 0.614로 가장 많이 감소하였으나, 차광 처리구에서는 50% 및 70% 모두 0.8 이상을 유지하며 유의적인 변화는 없었다. 등숙기 엽록소 함량은 자연광에서 자란 경우 출수 후 15일 이 지난 시점에 호농 (152), 호품 (146), 보람찬 (130) 순이며, 호농이 보람찬과 호품에 비해 엽록소를 오래 유지하는 것으로 나타났다. 등숙기 차광처리에 의해 천립중과 수량은 차광에 따라 감소하였고, 차광률에 따라 더 높은 감소율을 보였다. 천립중은 세 품종중 호농이 가장 적게 감소하는 경향을 보였다. Sunlight is the main energy source on Earth which is energy used by photosynthesis to convert light energy to chemical energy. In this study, the light use efficiency and photosynthetic characteristics of high-quality rice cultivars after shading on grain filling stage. For the study, we treated of three levels of shade (0, 50 and 70%) on rice at grain filling stage and used three high yielding rice cultivars, such as Hopum, Honong, and Boramchan. The shade was given for the respective plots from heading up to harvesting. We were performed to determine growth survey, SPAD and chlorophyll fluorescence 15, 35, 55 days after shading on grain filling stage. Results of analysis of the results representing the maximum photosynthetic efficiency of PSII, Fv/Fm, and SPAD and were decreased by depending on the time at full sunlight. But shade treatments were not changed and a significant difference among cultivars did not appear. Total Chlorophyll (tChl) and carotenoid (tCar) contents was decreased by depending on the time at full sunlight. Also total chlorophyll content was decreased by level of shade but total carotenoid content was not changed at shading treatment. Rice yield and 1000 grain weight were decreased by depending on the level of shade. Change of 1000 grain weights due to shading treatments was found to be less in Honong than that in Boramchan and Hopum. But rice yields the rate of decrease was not observed the difference between varieties, when protected from light 70%, and decreased to less than 50%.

충북지역 중북부 중산간지 벼 출수생태형별 적응성 검토

이채영,최예슬,이정관,김익제,강신구,우선희,김영호,Lee, Chae Young,Choi, Ye Seul,Lee, Joung Kwan,Kim, Ik Jei,Kang, Shin Gu,Woo, Sun Hee,Kim, Young Ho 한국작물학회 2021 한국작물학회지 Vol.66 No.3

최근 지구온난화에 의해 기온이 상승하여 조생종을 주로 재배하는 중북부중산간지대에 중생종과 중만생종의 적응성을 검토하기 위해서 출수생태형별로 이앙시기를 달리해서 조생종 오대, 중생종 청품, 중만생종 삼광을 제천의 농가포장에서 시험한 결과는 다음과 같다. 1. 벼 생육에 영향을 미치는 기상요소 중 평균기온은 2010년대에 8월까지는 가장 높았고, 다른 시기보다 월별로 0.7~0.9℃가 높았으며, 일조시간은 장마, 태풍 등으로 인한 기상이변으로 가장 낮은 수준이었다. 2. 지난 35년간 오대의 지역적응시험 결과 출수기는 점점 빨라지고 있으며, 이앙부터 출수기까지 재배일수가 짧아져 간장과 수수가 감소되었다. 과거보다 등숙률은 최대 10%, 천립중은 2 g 이상 증가되었으나, 품질과 직결되는 출수 후 40일간 평균기온은 많게는 2℃ 이상 증가되었다. 3. 제천지역 안전출수한계기는 출수 후 40일간 적산온도 880℃ 기준으로는 8월 11일, 840℃ 기준으로는 8월 15일로 분석되었다. 4. 이앙시기별 출수생태형에 따라 생육은 비슷하였으나 이앙시기별 최고, 최저 수준을 비교한 등숙률은 조생종 6.5%, 중생종 3.7%, 중만생종 2.5% 높았다. 쌀수량은 조생종 83 kg, 중생종 113 kg, 중만생종 47 kg 많았으며, 완전미율은 조생종 17.8%, 중생종 3.2%, 중만생종 5.0% 높았다. 5. 중북부중산간지에서 안전출수한계기 및 완전미수량을 고려한 이앙시기는 조생종은 6월 15일, 중생종은 6월 5일, 중만생종은 5월 25일이었으며, 본 시험 지역(IV-1)에서도 온난화로 인해 중생종과 중만생종이 안정적으로 재배될 수 있을 것으로 예상된다. In recent years, air temperature has been increasing rapidly compared to the 1980s because of global warming. This increase in temperature reduces the yield and quality of rice; therefore, measures are needed to prevent such effects and ensure food security. The early maturing type (EMT) of rice is mainly cultivated in the central northern mid-mountainous area (CNMA). This study was conducted to shift the transplanting date of EMT and to examine the adaptability of the mid-maturing type (MMT) or mid-late maturing type (MLMT) in the Jecheon region of the CNMA to address global warming. The air temperature increased by 0.7-0.9℃ in the 2010s, compared to that in the 1980s, and was similar to other decades during the ripening period. Over the past 35 years, considering rice quality, the heading date of the Odae variety has arrived sooner by approximately 10 days, the ripened grain ratio has increased by more than 10%, and the thousand grain weight; however, the mean temperature at 40 days after heading has increased by more than 2℃. The late marginal heading date in the Jecheon region was determined as August 11 based on the accumulated temperature of 880℃ and August 15 based on 840℃ for 40 days after heading. According to different transplanting dates, milled rice yield per 10 a was the highest at 567 kg with June 10 in EMT, 595 kg with June 10 in MMT, and 572 kg with May 30 in MLMT. Considering the late marginal heading date, rice yield, and quality, the optimum transplanting date was June 15 in EMT, June 5 in MMT, and May 30 in MLMT in the Jecheon region of CNMA. Owing to global warming, MMT and MLMT are expected to be reliably cultivated in the CNMA.

남부평야지에서 고품질 쌀 생산을 위한 "수광"의 적정 이앙시기

김영두 ( Young Doo Kim ),강신구 ( Shin Gu Kang ),구본일 ( Bon Il Ku ),상완규 ( Wan Gyu Sang ),조서리 ( Seo Ri Jo ),박홍규 ( Hong Kyu Park ),신운철 ( Woon Chul Shin ),고종철 ( Jong Cheol Ko ),양운호 ( Woon Ho Yang ),김보경 ( Bo Kye 한국국제농업개발학회 2015 韓國國際農業開發學會誌 Vol.27 No.1

A field experiment was conducted to determine the optimal transplanting date for ‘Sukwang’, a high grain quality japonica rice, in the southwestern plain area in South Korea. 25-day-old seedlings were transplanted four times by 15 days interval on May 16, June 1, 16, and 30 in 2013 and 2014. Heading dates were August 12 and August 29 in the first and the last transplanting, respectively. Ripening ratio was highest in June 1 and June 16 plots at range of 93 - 94%, and was lowest in 16 May plot. Milled rice yield was the highest in June 1 and June 16 at rage of 538 - 555 kg/10a, and was the lowest in May 16. Head rice yield showed same tendency to milled rice yield. Protein content was not significantly different among treatments except June 1, however, it was slightly increased in the later transplanting plots. Amylose content was increased in the later transplanting plots. According to the regression curve of transplanting dates and grain yield, the optimal transplanting date of ‘Sukwang’ was June 10 in the southwestern plain area in Korea.

연구보문 : 자연과학 ; 2011년 태풍 "무이파(1109)"에 의한 벼 조풍 피해 특성 및 수량 감소

박홍규 ( Hong Kyu Park ),강신구 ( Shin Gu Kang ),이경도 ( Kyung Do Lee ),권오도 ( Oh Do Kwon ),구본일 ( Bon Il Ku ),최민규 ( Min Kyu Choi ),김영두 ( Young Doo Kim ),고재권 ( Jae Kweon Ko ),김보경 ( Bo Kyeong Kim ) 한국국제농업개발학회 2012 韓國國際農業開發學會誌 Vol.24 No.5