• 한국환경과학회지
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• 제30권12호
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• pp.1015-1025
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• 2021

Our research work aimed to evaluate cover crop effects of winter rye on soil characteristics, soil conservation, and yield productivities on potato fields with 15% slope during a fallowed period. There were two controls of bared field without any cultivation and conventional potato cultivation without winter rye. Potato cultivation increased soil pH, organic matter, available phosphate, and exchangeable cation regardless of cover crop cultivation. Sub-soil, particularly, all components of soil chemical properties showed higher value in winter rye cultivation than conventional cultivation. Higher soil density was observed on cover crop cultivation than conventional cultivation resulting from root residues of the cover crop both topsoil and subsoil. Cover crop residues positively affected plant growth and reduced the amount of soil erosion by holding the soil. Although severe soil erosion was seen in conventional cultivation, winter rye cultivation declined soil erosion by 47% during the fallow period on potato slope fields. Distinct soil bacterial communities were detected among treatments and some OTU(Operational Taxonomic Unit)s showed significantly higher abundance in winter rye treatment. Total yield and commercial rate demonstrated no significant differences while higher tuber phosphate, K⁺, and Mg²⁺ contents were observed in winter rye cultivation.

• 농촌계획
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• 제27권3호
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• pp.21-33
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• 2021

Rice straw management and winter crop cultivation are crucial components for the accurate estimation of paddy methane emissions. Field-based extensive investigation of paddy organic matter management requires enormous efforts however it becomes more feasible as drone technology advances. The objectives of this study were to identify paddy fields of straw application and winter crop cultivation using drone images and to apply for the estimation of yearly methane emission. Total 35 sites of over 150ha in area were selected nationwide as the study areas. Drone images of the study sites were taken twice during summer and winter in 2018 through 2019: Summer images were used to identify paddy cultivation areas, while winter images for straw and winter crop practices. Drone-image-based identification results were used to estimate paddy methane emission and compared with conventional method. As the result, mean areas for paddy, straw application and winter crop cultivation were 118.9ha, 12.0ha, and 11.3ha, respectively. Overall rice straw application rate were greater in Gyeonggi-do(20%) and Chungcheongnam-do(12%), while winter crop cultivation was greatest in Gyeongsangnam-do(30%) and Jeolla-do(27%). Yearly mean methane emission was estimated to be 226.2kg CH₄/ha/yr in this study and about 32% less when compared to 331.8kg CH₄/ha/yr estimated with the conventional method. This was primarily because of the lower rice straw application rate observed in this study, which was less than quarter the rate of 55.62% used for the conventional method. This indicates the necessity to use more accurate statistics of rice straw application as well as winter crop practices into paddy methane emission estimation. Thus it is recommended to further study to link drone technology with satellite image analysis in order to identify organic management practices at a paddy field level over extensive agricultural area.

• 한국농공학회논문집
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• 제64권1호
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• pp.51-63
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• 2022

Up-to-date statistics of crop cultivation status is essential for farm land management planning and the advancement in remote sensing technology allows for rapid update of farming information. The objective of this study was to develop a classification model of rice paddy or winter crop fields based on NDWI, NDVI, and HSV indices using Sentinel-2 satellite images. The 18 locations in central Korea were selected as target areas and photographed once for each during summer and winter with a eBee drone to identify ground truth crop cultivation. The NDWI was used to classify summer paddy fields, while the NDVI and HSV were used and compared in identification of winter crop cultivation areas. The summer paddy field classification with the criteria of -0.195

• 한국토양비료학회지
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• 제49권4호
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• pp.335-340
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• 2016

Soil organic carbon plays an important role on soil physico-chemical properties and crop yields in paddy soil. However, there is little information on the soil organic carbon under different forage cultivation during winter season in rice paddy. In this study, we investigated the soil organic carbon and physico-chemical properties in 87 fields of paddy soil cultivated with Barley, rye, and Italian ryegrass (IRG) as animal feedstock during winter season. Organic carbon was 12.9, 14.3, and $16.9g\;C\;kg^{-1}$ in soil with barley, rye, and IRG cultivation, respectively. Among rice-forage cultivation systems, the rice+IRG cropping system was 19.5% higher than in the mono-rice cultivation. Bulk density ranged from 1.17 to $1.28g\;cm^{-3}$ irrespective of cropping systems, and had strongly negative correlation with the soil organic carbon in the rice+IRG cropping system. Carbon storage in rice+IRG cropping systems was average $29.6Mg\;ha^{-1}$ at 15 cm of soil depth, which was 20.4 and 10.3% higher than those of barley and rye cultivation. Increasing carbon storage in paddy soil contributed to the fertility for following rice cultivation. This results indicated that IRG cultivation during winter season could be an alternative and promising way to enhance soil organic carbon content and fertility of paddy soil.

• 한국작물학회지
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• 제58권1호
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• pp.15-19
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• 2013

밀 친환경 재배를 위해 화학비료 사용을 줄이고 밀 품질을 향상하기 위한 유기질비료와 미생물퇴비의 적정 사용량을 설정하고자 시험한 결과를 요약하면 다음과 같다. 1. 밀 생육특성 중 간장은 시비량이 많을수록 보리복합비료 처리에서는 컸으나 미생물퇴비와 유기질비료 처리에서는 뚜렷한 차이를 보이지 않았고, 수장은 보리복합비료 > 미생물퇴비 > 유기질비료 순으로 길었으나 시비량 간에는 일정한 경향을 보이지 않았다. 2. 밀 수량구성요소 중 수당입수는 비료 종류나 시비량 간에 차이가 없었고, $m^2$당 경수는 비료 종류 간에는 복합비료 > 유기질비료 > 미생물퇴비 순으로 많았으며, 시비량은 200% 시용에서는 많아 차이를 보였으며, 천립중은 금강밀은 41.1~42.7 g, 조경밀은 41.0~42.9 g 으로 처리 간에 일정한 경향을 보이지 않았다. 3. 비료의 종류에 상관없이 시비량이 증가 할수록 생육 및 수량은 좋았으며, 비종간에는 유기질비료가 미생물 퇴비보다 수량성은 높으나 보리복합비료(관행 4.12 Ton $ha^{-1}$) 대비 2~6%가 감수되었으나 통계적으로 유의성이 없었다. 4. 친환경 자재의 적정 사용량은 표준시비 수준인 유기질 비료은 800 kg $ha^{-1}$, 미생물퇴비는 2,000 kg $ha^{-1}$ 시용으로 95%이상의 수량을 얻을 수 있었다. 5. 밀가루의 품질은 밑거름 50% 감비구에서 다소 떨어지는 경향을 보였으며, 단백질함량과 침전가는 관행복합비료 > 미생물퇴비 > 유기질비료 순이었으나 회분함량은 0.40~0.38%로 일정한 경향을 보이지 않았다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.226-226
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• 2017

This study was to evaluate methods to high quality food ramie rice cake, thereby increasing farm income. This study investigated the effects of different covering material on stable winter survival management with edible leaf in Ramie(Boehmeria nivea L.). The method of winter survival with covering material were conducted under three condition compose to Non covering, Rice straw cutting covered with 500kg.10a-1, Rice husks covered with 1,000kg.10a-1(covered 4~5 cm thickness in the soil surface). Method of application were standard application(N-P-K-Compost applied at 27-9-27-600kg.10a-1. Compost and fused phosphate applied at 100% of basal fertilizer in March 25. 20% of top dressing were four times application in March 25 - October 5. Planting year were March 15, 2011. Plants were spaced 60 cm apart in rows 25 cm apart with open cultivation. According to non covering < Rice husks covered with 1,000kg.10a-1 < Rice straw cutting covered with 500kg.10a-1 cultivation this order, aerial part as a result were plenty amount of growth. Sprout time and winter survival rates was uncovering control plot compared to 2 - 5 days quickly, 45-57% highly by rice husks and rice straw covering. Green leaf yields is untreated control plot (12,44 kg.10a-1) compared to rice husks covering 7% higher, and rice straw covering increased to 18% of the most.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2005년도 춘계학술발표회 요지
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• pp.138-139
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• 2005

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.333-333
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• 2017

This study was conducted to establish of cropping system for year-round forage crops production in east-southern part of Korea and investigated their productivity and feed values. Cropping systems were tested in experiment using oat (cv. Highspeed and Darkhorse) in spring and autumn season, corn (cv. Kwangpyeongok) and sorghum (ss-450) in summer season and rye (cv. Gogu) and triticale (cv. Joseong) in winter season. Considering the forage productivity and feed value such as acid detergent fiber (ADF), neutral detergent fiber (NDF) and total digestive nutrients (TDN), this result suggest that three cropping system for year-round forage crops production. The combinations with triticale (winter), corn or sorghum (summer) and oat (autumn) were would be suitable ones. And also the combinations with rye (winter), corn or sorghum (summer) and oat (autumn) were would be suitable. If forage crops cultivation was started in spring season, the combinations with oat (spring), oat (autumn), triticale or rye (winter), corn or sorghum (summer) and oat (autumn) were would be appropriable. For the more suitable cropping system, we are proceeding on verification experiment of year-round forage crops.

• 한국환경농학회지
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• 제26권4호
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• pp.300-305
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• 2007

고랭지 밭토양의 동계 피복작물재배에 따른 밭토양의 지력증진과 증수효과를 분석하기 위하여 고랭지의 주요 재배작물인 감자와 배추를 대상으로 고랭지 농업지대에 적합한 동계 피복작물을 선발하고, 피복작물재배가 토양의 물리-화학적 특성 변화에 미치는 영향, 고랭지 작물의 생산성 및 병해발생 정도를 작부체계와 연계하여 비교 검토하였다. 고랭지에서 월동성이 가장 우수한 피복작물은 17개 시험초종 중 호밀이었으며, 호밀의 적정 파종기는8월 하순부터 9월 하순으로 10월 상순 서리가 내리기 이전까지는 파종하여야 할 것으로 판단되며, 토양의 물리-화학성은 윤작과 동계 호밀재배로 토양 공극 및 유기물 함량이 증가하는 경향으로 윤작보다 동계호밀재배에 의한 토양 물리성 개선 및 토양 화학성분의 함량증가가 현저하였다. 고랭지 감자와 배추에 대하여 매년 윤작으로 작부체계를 검토한 결과 동계호밀재배는 나지에 비하여 작부체계와 관계없이 수량은 $6{\sim}8%$증가하였다. 동계 호밀재배에 의한 토양관리 방법은 토양유실 방지효과와 더불어 감자의 수확량 증대, 감자의 병해 발생률을 감소시키므로 우량 씨감자 생산을 위한 새로운 농업기술로 적용되어야 할 것으로 생각된다.

• 한국초지조사료학회지
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• 제43권2호
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• pp.75-87
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• 2023

이 연구는 경기도 수원과 대구지역에서 11년 동안 수행된 호밀 재배 시험 성적과 기상자료를 분석하여 생육특성과 수량성을 비교하고, 그것에 관여하는 요인을 분석하여 국내에서 육성된 호밀품종 "곡우"의 재배적지를 설정하는데 활용하기 위해 실시되었다. 연구 결과, 대구와 수원지역은 호밀 재배에 적합한 기후를 가지고 있으며, 수원지역은 대구지역에 비해 수분 공급력이 우수하였다. 또한, 기후적합도를 분석한 결과, 수분 공급력과 깊은 관계가 있는 호밀의 재배기간 중 강우일수와 강수량이 호밀의 생육과 수량에 영향을 미치는 요소로 확인되었다. 이 연구는 상관 및 주성분 분석을 통해 기후와 호밀의 생육 및 수량 요소 간의 관계를 평가하였고, 재배지역 간의 차이를 확인하였다. 이 연구는 국내에서 육성된 호밀 품종의 재배에 유용한 정보를 제공하고, 재배적지를 결정하는데 도움을 줄 수 있다.