간척지 토양에서 벼 재배시 염농도별 완전 낙수시기

최원영,이규성,고종철,문상훈,김정곤,Choi Weon-Young,Lee Kyu-Seong,Ko Jong-Cheol,Moon Sang-Hoon,Kim Chung-Kon 한국작물학회 2005 Korean journal of crop science Vol.50 No.suppl1

본 연구는 남서해안 간척지에서 토양 염농도(저염; $0.1\%$, 중염; $0.3\~0.4\%$)별로 쌀 품질 향상을 위한 완전 낙수시기를 구명하기 위하여 시험한 결과를 요약하면 다음과 같다. 1. 저염토양에서의 완전낙수시기에따라 $m^2$당 립수가 비슷하여 쌀 수량은 유의차가 없었다. 중염토양에서는 완전낙수시기가 빠를수록 염피해를 받아 등숙비율이 낮아져, 쌀 수량은 출수후 30일까지는 감수하였고 35일 이상에서는 같았다. 2. 토양 염농도간의 쌀 수량은 중염 토양에서 저염 토양의 $64\%$ 수준으로 감소하였다. 3. 저염 토양에서 완전미 비율이 높았으나 현미품위는 처리농도간에 차이를 볼 수 없었다. 4. 2002년 기상은 완전낙수시기에 잦은 강우로, 2003년에는 생육기 저온으로 인하여 완전 낙수시기를 결정하기 어려웠지만 수량 및 도복 등을 고려해 볼 때 저염 토양에서는 출수 후 $20\~40$일에, 중염 토양에서는 출수 후 $35\~40$일에 완전낙수하는 것이 안전할 것으로 생각된다. This study was conducted to identify the effective dyainage-time influencing rice yield and grain quality on a reclaimed saline soil, the experiment conducted at the Gyehwado substation of the Honam Agricultural Research Institute from 2002 to 2003. The experimental field contained $0.1\%\;and\;0.3\~0.4\%$ NaCl in soil solution, respectively. The experiment involved salinity levels as main plot and sub-plot where consisted of 6 treatments in a split plot design with three replicates. Rice yield performance showed a maximum at drainage-time for 35 days after flowering under medium salinity level, but indicated only $64\%$ of yield level compare to low soil salinity. Percentage of well-shaped rice was high in low soil salinity indicating there aye severe affection for grain quality in medium soil salinity regardless water drainage-time.

벼 휴립건답직파 절수재배에 알맞은 질소 분얼비 시비량

최원영(Weon Young Choi),김상수(Sang Su Kim),송동석(Dong Seog Song),최선영(Sun Young Choi) 한국농림기상학회 2001 한국농림기상학회지 Vol.3 No.2

This study was conducted to identify the optimum proper nitrogen (N) application rate for tillering in ridge direct seeding on dry paddy of rice culture. During 1998, a series of experiments was carried out at paddy field (Chonbuk series) of the National Honam Agricultural Experiment Station, RDA using Dongjinbyeo. Leaf area index and top dry weight increased with higher N levels, especially in the 100 kg/ha seeding rate compared with the 60 kg/ha seeding rate. N use efficiency increased at increased by 50~75% of the N topdressing rate at tillering. Heading date, ripened grain rate, and 1,000-grain weight of brown rice did not vary among the rate of topdressing for tillering and seeding rates. The highest grain number per unit area was at the level of increased by 75% in N topdressing at tillering stage. Milled rice yield increased 5% at the 60 kg/ha seeding rate and increased 16~17% at the 100 kg/ha seeding rate at increased by 50~75% of topdressing N compared with 48 kg/ha top-dressed N of 60 kg/ha seeding rate.

연구보문 : 쌀 품위 향상을 위한 중대립 "다미"의 적정 이앙시기 규명

최원영 ( Weon Young Choi ),최민규 ( Min Kyu Choi ),구본일 ( Bon Il Ku ),박홍규 ( Hong Kyu Park ),김영두 ( Young Doo Kim ),고종철 ( Jong Cheol Ko ),고재권 ( Jae Kwon Ko ),유진희 ( Jin Hee Ryu ),김시주 ( Si Ju Kim ) 韓國國際農業開發學會 2009 韓國國際農業開發學會誌 Vol.21 No.3

연구보문 : 벼 이앙재배에서 재식밀도간 질소분시방법에 따른 수량과 미질

최원영 ( Weon Young Choi ),최민규 ( Min Kyu Choi ),고종철 ( Jong Cheol Ko ),김영두 ( Young Doo Kim ),양창휴 ( Chang Hyu Yang ),김택겸 ( Tack Kyum Kim ),김시주 ( Si Ju Kim ) 한국국제농업개발학회 2010 韓國國際農業開發學會誌 Vol.22 No.4

호남평야지에서 중대립 "다미"의 수량 및 품질 향상을 위한 적정 재식밀도 및 질소분시방법을 구명하기 위하여 2007년과 2008년까지 익산 호남농업연구소에서 수행한 내용을 요약하면 다음과 같다. 가. 출수기는 8월 19일로 재식밀도 및 질소분시방법간 차이가 없었다. 나. 재식밀도간 쌀수량과 심백미율은 비슷하였고, 완전미율 은 18.2주가 24.2주/m2 이앙보다 많았으며, 질소분시방법간 쌀 수량은 30:20:50>50:20:30>70:0:30% 순으로 많아 최고수량은 재식밀도 24.2주/m2 이앙에서 질소분시방법은 50:20:30% 이었으며, 백미완전미율은 50:20:30% 분시에서 높았고 단백질함량은 50:20:30<70:0:30<30:20:50% 순으로 낮았다. 이상의 결과로 볼 때, 중대립 "다미"의 품질 향상을 위한 적정 재식밀도는 24.2주/m2 이앙이고 질소분시방법은 50:20:30% 이었다. This study was conducted to establish an optimum planting density and nitrogen split ratio for the improvement yield and quality of transplanting rice in Honam plain region. Field trials were undertaken with rice cultivar "Dami" in experimental paddy fields, located at Iksan, of National Institute of Crop Science in 2007 and 2008. Over two seasons, there were two levels of planting density 18.2 and 24.2 hills m-2 and three levels of nitrogen(N) split application ratio of 30:20:50%, 50:20:30% and 70:0:30%, transplanting:2nd topdressing at tillering stage:3rd topdressing at panicle initiation stage, respectively, of total N(9g m-2) applied. There was no significant in plant growth and yield components by N split ratio under different planting density, and rice yield and the ratio of white core were similar in planting densities. The head rice ratio was higher in 18.2 than 24.2 hills m-2. The rice yield by nitrogen split ratio was higher in the order of 30:20:50>50:20:30>70:0:30%. The top yield of head rice was in 24.2 hills m-2 of planting density with 50:20:30% of nitrogen split ratio. Head rice ratio was highest in 50:20:30% of nitrogen split ratio. The protein content was low in the order of 50:20:30<70:0:30<30:20:50%. These results suggest that an optimum planting density was 24.2 hills m-2 with N split application ratio of 50:20:30%.

절수관개방법이 벼 수량 및 품질에 미치는 영향

최원영 ( Weon Young Choi ),박홍규 ( Hong Kyu Park ),문상훈 ( Sang Hoon Moon ),최민규 ( Min Gyu Choi ),김상수 ( Sang Su Kim ),김정곤 ( Chung Kon Kim ) 한국농림기상학회 2006 한국농림기상학회지 Vol.8 No.3

신간척지에서 벼 기계이앙재배시 적정 질소시비량 구명

최원영 ( Weon Young Choi ),정재혁 ( Jae Hyeok Jeong ),김선 ( Sun Kim ) 한국국제농업개발학회 2014 韓國國際農業開發學會誌 Vol.26 No.3

This study was conducted to identify the optimal nitrogen amount of rice transplanting cultivation in newly reclaimed land, in light of minimum salt damage and high yield of rice. The nitrogen amount treatments were 11 kg/10 a, 14 kg/10 a, 17 kg/10 a, 20 kg/10 a and diagnostic fertilization. The average of soil salinity fell from 0.06% to 0.03% during 2 years after flooding and rice transplantation. The heading date was August 16 nitrogen at rate of 11 kg/10 a and 14 kg/10 a, August 17 at 17 kg/10 a and 20 kg/10 a. The lodging index tended to rise in proportion to nitrogen application amount; any of rice plants were not lodged at 11 kg/10 a, but the lodging index was 1 and 3 at 14 kg/10 a and 17 kg/10 a respectively. At 20 kg/10 a, however, over half of rice plants were lodged with the lodging index 7. The panicle number per hill was the highest at 17 kg/10 a, followed by the diagnostic fertilization, 20 kg/10 a, 14 kg/10 a and 11 kg/10 a. The percentage of ripened grains was similar to the weight of 1,000 grains of brown rice, and thus the rice yield was the highest at the diagnostic fertilization and at 17 kg/10 a equally, followed by 14 kg/10 a, 20 kg/10 a and 11 kg/10 a. The percentage of perfect kernels was the highest at 14 kg/10 a, followed by the diagnostic fertilization and 11 kg/10 a, 17 kg/10 a, and 20 kg/10 a. The amylose content was not significantly different by nitrogen application amount, but the protein content was closely correlated with it. Altogether, the optimal nitrogen application amount was found to be 16 to 18 kg/10 a on the premise that rice seedlings would be mechanically transplanted in newly reclaimed land.

벼 휴입한답직파 절수재배에 알맞은 질소 수비량

최원영(Weon Young Choi),박홍규(Hong Kyu Park),이기상(Ki Sang Lee),김상수(Sang Su Kim),이재길(Jae Kil Lee),김순철(Soon Chul Kim),최선영(Sun Young Choi) 한국농림기상학회 2001 한국농림기상학회지 Vol.3 No.4

This study was conducted to identify the optimum nitrogen (N) fertilization at panicle initiation stage on ridge direct seeding on dry paddy of rice. During 1999~2000, a series of experiments was carried out at field (Chonbuk series) of the National Honam Agricultural Experiment Station, RDA using Dongjinbyeo. Plants were taller, and leaf area index and top dry weight increased with more N fertilization at panicle initiation stage. Photosynthetic rate of heading stage was higher at higher amounts of N fertilization at panicle initiation stage, especially in 6㎏/10a compared with 10㎏/10a seeding rate. Lodging index and its related traits did not significantly differ under different rates of N fertilization at panicle initiation stage. N uptake of the rice plant increased as more N fertilization at panicle initiation stage. N use efficiency was highest under the standard topdressing rate at 6㎏/10a seeding rate. Panicle number per ㎡ increased with more topdressed N, but ripened grain rate and 1,000-grain weight of brown rice did not differ with an increase in topdressed N. Milled rice yield was 6% higher in the 6㎏/10a seeding rate and 13% higher in the 10㎏/10a seeding rate at 50% more topdressed N compared with 4.8㎏/10a N fertilization at panicle initiation stage of 6㎏/10a seeding rate.

서남부간척지 벼 담수표면직파 재배시 기비시용시기별 생육 및 수량

김영두 ( Young Doo Kim ),최민규 ( Min Kyu Choi ),백만기 ( Man Gee Baek ),구본일 ( Bon Il Ku ),강신구 ( Shin Gu Kang ),박홍규 ( Hong Kyu Park ),최원영 ( Weon Young Choi ),고재권 ( Jae Kwon Ko ) 한국국제농업개발학회 2011 韓國國際農業開發學會誌 Vol.23 No.4

Field experiment was carried out to identify the optimum time of basal application of nitrogen in Southwestern reclaimed saline land. Nitrogen application before seeding and 10, 20 & 30 days after seeding were evaluated with three nitrogen application levels(140, 170 & 200 kg/ha) in Munpo soil series having 0.1~0.2% of soil salinity. Nitrogen was split-applied with forestage; basal, tillering stage, flowering initiated stage and ripening stage by a ratio of 50-20-20-10%. Results reveled that seedling stands were considerably higher when basal nitrogen applied before seeding as compared to after seeding. Grain yield increased with increase of nitrogen application before seeding. Grain yield was the highest when nitrogen application was 170~200 kg/ha before seeding. Therefore, it is recommended that the optimum nitrogen application level was 170~200 kg/ha before seeding in direct seeded rice in southwestern reclaimed saline land for maximum plant establishment and grain yield.

서남부 간척지에서의 고품질 쌀 생산을 위한 적정 질소시비량

백남현,최원영,고종철,남정권,박홍규,정진일,김상수,박광근,Back Nam-Hyun,Choi Weon-Young,Ko Jong-Cheol,Nam Jeong-Kwon,Park Hong-Kyu,Choung Jin-Il,Kim Sang-Su,Park Kwang-Geun 한국작물학회 2005 한국작물학회지 Vol.50 No.suppl1

This study was carried out to investigate the proper nitrogen fertilizer level at reclaimed saline land in the southwestern area of Korea from 2002 to 2004. The rice cultivars tested were Samcheonbyeo(Early maturing one), Nampyeongbyeo (Medium maturing one) and Hwaseongbyeo(Mid-late maturing one). The results aye summarized as follows: The more the nitrogen level, the more number of panicle and spikelet per unit area was. But, ripened grain rate and 1000-grain weight were decreased at higher nitrogen level. As higher nitrogen level, head rice rate was decreased and protein content was increased. But, amylose content wasn't differ among the nitrogen fertilizer application levels. As increase nitrogen level in head rice yield increased up to 12 kg/10a, 11 kg/10a, in Samcheonbyeo, Hwaseongbyeo and Nampyeongbyeo, respectively. But there wasn't different more than it. Consequently, considering the yield of head rice, ripened grain rate and rice quality. The proper nitrogen fertilizer application level was 11-12 kg/10a at reclaimed saline land in the southwestern area of Korea. 서남부 간척지에서 고품질 쌀 생산을 위한 생태형별 적정 질소시비량을 구명하고자 2003년과 2004년에 호남농업연구소 계화도출장소 시험포장 문포통(세사양토, 토양 염농도 $0.1\%$)에서 삼천벼, 화성벼, 남평벼를 공시하여 질소시비량에 따른 벼 생육, 수량구성요소, 수량 및 품질 관련형질을 검토한 결과를 요약하면 다음과 같다. 1. 단위면적당 수수와 영화수는 질소시비량이 증가할수록 많았으나 등숙비율이 낮았으며 현미천립중도 가벼웠다. 2. 백미의 완전립비율은 질소시비량이 많을수록 낮아졌고, 단백질 함량은 질소시비량이 증가됨에 따라 다소 높아지는 경향이었으나 아밀로스함량은 질소시비량간에 별 차이가 없었다. 3. 완전미 수량은 삼천벼가 질소 12/10a수준까지, 화성벼와 남평벼는 11/10a 수준까지는 증수되었으나 그 이상의 질소시비량에서는 수량차이가 인정되지 않았다. 4. 따라서 서남부간척지에서 벼 기계이앙재배시 완전미 수량, 등숙비율 및 미질 등을 고려한 10a당 적정 질소시비량은 $11\~12$으로 판단된다.

서남부 간척지에서 벼 담수표면산파재배시 토양 염농도별 적정 파종량

백남현,최원영,고종철,박홍규,남정권,박광근,김상수,김보경,김정곤,Back, Nam-Hyun,Choi, Weon-Young,Ko, Jong-Cheol,Park, Hong-Kyu,Nam, Jeong-Kweon,Park, Kwang-Geun,Kim, Sang-Su,Kim, Bo-Kyeong,Kim, Choung-Kon 한국작물학회 2006 한국작물학회지 Vol.51 No.suppl1

서남부 간척지에서 벼 담수표면산파재배시 토양 염분농도별 적정 파종량을 구명하고자 $2003{\sim}2004$년에 걸쳐 호남 농업 연구소 계화도출장소 시험포장인 문포통(세사양토)의 저영답(토양 염농도 0.1%)과 중염답(토양 염농도 0.3%)에서 서간벼를 공시하여 파종량별 입모수, 생육, 수량 및 백미 외관 품위 등을 검토한 결과를 요약하면 다음과 같다. 1. 입모수는 중염답보다 저염답에서 파종량이 증가할수록 많았다. 2. 간장과 수장은 중염답이 저염답보다 파종량이 증가할 수록 짧았으며, 도복은 토양염농도에 상관없이 파종량이 증가할수록 심했다. 3. 완전미 수량은 저염답에서는 파종량 5 kg/10a까지, 중염답에서는 파종량 7 kg/10a까지는 증가되었으나 그 이상의 파종량에 서는 수량이 증가하지 않았다. 4. 백미의 외관상 품위는 파종량이 증가할수록 저염답보다 중염답에서 완전미율이 낮았다. 5. 따라서 서남부 간척지에서 벼 담수표면산파재배시 입모, 벼 생육, 완전미 수량 및 백미의 외관상 품위 등을 고려할 때 적정 파종량은 저염답은 $5{\sim}7kg/10a$, 중염답은 $7{\sim}9kg/10a$이 적당할 것으로 생각된다. This study was conducted to establish the optimum seeding rate in different soil salinity level for yield stability of broadcasting on flooded paddy surface to the reclaimed saline land of south-western part at Gyehwado substation of the Honam Agricultural Research institute in $2003{\sim}2004$. Soeganbyeo was tested in the Munpo series (fine sand loam) the results obtained is as follows: As seeding rate was higher, the number of seeding stand was increased and the number of seeding stands in the low salinity field is sharply increased than those of the medium salinity field. The length of culm in medium salinity field tends to be shorter than that of the low salinity field and as seeding rate was increased, the lodging is severe. The milled rice yield was increased as up to 9 kg/10a in low and medium salinity soil. Complete rice was no significantly increased over 5 kg/10a seeding rate in low salinity field and over 7 kg/10a seeding rate in medium salinity field. Considering the yield of milled and complete rice, seeding stand and lodging, The proper seeding rate is $5{\sim}7kg/10a$ in low salinity and $7{\sim}9kg/10a$ in medium salinity for broadcasting on flooded paddy surface at the reclaimed saline land of southwestern part.