• 한국잡초학회지
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• 제13권2호
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• pp.159-163
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• 1993

건답직파(乾畓直播)를 연속(繼續)함에 따라서 야기되는 잡초군락(雜草群落)의 변이양상(變異樣相)을 밝혀 효과적(效果的)인 제초체계(除草體系)를 확립(確立)하고자 수행(遂行)한 결과(結果)는 다음과 같다. 1. 벼 건답직파재배(乾畓直播栽培)를 4년간(年間) 연속재배(連續栽培)한 경우 화본과잡초(禾本科雜草)는 감소(減少)한 반면 광엽잡초(廣葉雜草)는 증가(增加)하였으며 생활형(生活型)으로 보면 1년생잡초(年生雜章)는 증가(增加)하였으나 다년생잡조(多年生雜草)는 감소(滅少)하였다. 2. 기계이앙시(機械移秧時) 우점잡초(優占雜草)는 올방개-피-올챙이고랭이-물달개비 등의 수생잡초(水生雜草)가 우점(優占)하였으나 건답직파재배(乾畓直播栽培)를 연속(繼續)할 경우 피-바랭이-가막사리-조개풀-자귀풀 등의 습생잡초(濕生雜草)가 우점(優占)하였다. 3. 건답직파(乾畓直播)에 따른 초종(草種)의 다양화(多樣化) 정도(程度)(Simpson Index) 및 군락우점도(群落優占度)(Community dominance)를 보면 기계이앙(機械移秧)의 경우 1-2 초종(草種)이 우점화(優占化)되는 경향(傾向)이었으나 건답직파(乾畓直播)의 경우 여러 초종(草種)이 다양(多樣)하게 분포(分布)되어 있었다. 4. 직파재배(直播栽培)에 따른 연도별(年度別) 유이성(類似性) 계수(係數)(Similarity coefficient)를 보면 직파재배(直播栽培)의 첫해는 41%의 유이성(類似性) 계수(係數)를 나타내 기계이앙(機械移秧)과 상당히 달랐으나 4년간(年間) 연속직파재배(連續直播栽培)를 할 경우 67%로 높아졌다. 5. 건답직파(乾畓直播) 첫해인 1979년도(年度) 잡초방임구(雜草放任區)의 잡초(雜草) 건물중(乾物重)은 $m^2$당 61.3g에 벼 수량(收量)은 290kg/10a이었으나 3년후(年後)인 1992년(年)에는 잡초건물중(雜草乾物重)이 293g/$m^2$으로 1979년에 비해 4.7배가 증가(增加)하였으며 벼 수량(收量)은 전무(全無)였다.

• 생물환경조절학회지
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• 제10권3호
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• pp.187-196
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• 2001

아스파라거스의 도입품종에 대한 품종간 생육특성을 검토하기 위해 Excel 등 6품종을 공시하였으며, 노지재배시 경고병 억제와 생산성 향상을 목적으로 비가림 및 멀칭효과에 대하여 검토하였다. 품종간 5개년 평균 상품수량을 보면 노지에서는 UC309와 Excel 품종에서 각각 520kg.10a$^{-1}$, 451kg.10a$^{-1}$으로 양호하였으며, 비가림의 경우에서도 역시 UC309와 Excel 품종에서 각각 1,008kg.10a$^{-1}$, 930kg.$10^{-1}$으로 우수한 결과를 보였다. 전반적으로 비가림재배에서 노지보다 78%의 수량증수 효과를 보였으며 그 중에서도 UC309와 Excel의 경우 노지의 약 2배 정도의 수량을 나타내어 UC309와 Excel은 노지와 비가림재배시 모두 수량성이 양호한 품종으로 생각되었으며 경고병에도 다소 강한 특징을 보였다. 비가림과 멀칭효과에 있어서 출아일과 첫 수확일의 경우 노지에 비해 비가림처리에서 2~3일 빨랐으나 멀칭처리간에는 차이를 보이지 않았다. 주당 경수, 순의 수 등도 비가림 처리에서 많았는데 멀칭처리간에는 볏짚과 흑색멀칭에서 양호한 결과를 보였다. 수량에 있어서도 멀칭 및 비가림 효과가 크게 나타났는데, 수확개시 후 5년 동안의 평균 상품수량을 보면 흑색PE 멀칭에서 888kg.10a$^{-1}$으로 가장 많아 노지 무멀칭에 비해 253%의 증수효과를 보였으며, 노지의 경우 무멀칭 보다 오히려 흑백멀칭 처리에서 가장 낮은 결과를 보였다. 경고병은 노지의 경우 멀칭처리에 관계없이 25% 이상으로 높게 발생하였으나 비가림재배에서는 전혀 발생되지 않았다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2017년도 9th Asian Crop Science Association conference
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• pp.337-337
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• 2017

Accurate and optimal water supply to cereal crop is critical in growing stalks and producing maximum yields. Excessive soil moisture may cause nutrient deficiencies and oxygen deficiency. Excessive soil water during crop growth stages results in decrease of yields. In Korea, the largest agricultural lands are paddy fields. Recently, upland crops are cultivated in paddy field soils to reduce overproduced rice in Korea. In order to success this policy, it is necessary to fully understand crop response to excessive soil moisture condition from paddy field soils. Adzuki bean is one of major legumes which provide protein in daily diet. Adzuki bean has been well know its weakness to excessive soil moisture condition, In order to obtain optimal yields of adzuki bean from paddy field cultivation, it is necessary to understand response of adzuki bean under different soil moisture conditions. This study investigated characteristics of growths, yields and response degree of water stress from adzuki bean. Three cultivars were selected for this study; Chungju, Hongeon, and Arari. All adzuki beans were cultivated in a paddy field which was divided into three sections with different soil moistures. The paddy field was located in Milyang, Gyeongsangnam during 2016. One section of the paddy field had the greatest average soil moisture content as 35.1% during adzuki bean cultivation (very poor). The second greatest soil moisture section had 32.6% (somewhat poor) and the smallest soil moisture section had 28.9% of soil moisture (somewhat well). During cultivation of three cultivar adzuki beans, soil moisture contents and groundwater levels were monitored. All the characteristics of growth and yield components were measured; height, thickness, 100 seed weights etc. Stress index values were calculated by Stress Day Index (SDI). All cultivars had the greatest yields from somewhat well section. Chungju had the greatest yields throughout all three sections compared to other cultivars. Chungju had 81% greater yield than Hongeon which had the smallest yield from somewhat well section. Arari set in middle from all sections. However there was no significant differences yields from very poor and somewhat poor sections. Leaf SPAD values tended to decrease and stable carbon isotope values increased as soil moisture increased. However, Chungju had no difference across different soil moistures in SPAD and stable carbon isotope values, while Hongeon had the greatest differences across sections. These trends followed by SDI values. Chungju had the smallest SDI values compared to other cultivars, which meant that Chungju was the strongest tolerance against excessive soil moisture than other cultivars. All three cultivars showed severe decrease of yields from very poor and somewhat poor sections. Arari and Hongeon showed great decrease from somewhat well section compared to yields from upland soil. These two cultivars may not be proper cultivating in paddy fields. In conclusion, adzuki bean is very sensitive to soil moisture condition and detailed soil managements are required to obtain optimal yields of adzuki bean from paddy field cultivation.

• 농약과학회지
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• 제7권1호
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• pp.66-73
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• 2003

농약사용과 관련하여 농산물의 안전성 확보 및 환경영향 감소를 위한 농약사용 지표 개발에 활용하고자 고추, 딸기, 수박, 오이, 참외, 토마토 등을 대상으로 재배면적별 30지역 200농가를 선정하여 국내과 채류 재배 환경 중 농약의 사용량을 조사 분석하였다. 과채류 재배시 용도별 농약 사용량은 살균제 > 살충제 > 제초제 순으로 많았으며, 살균제의 사용이 약 $70\sim80%$를 차지하였다. 살균제의 주요 사용농약은 mancozeb, thiophanate-methyl, propineb 이었으며, 살충제는 imidacloprid, milbemectin, methomyl 등이 많이 사용되었다. 농약제형별 농약사용량은 수화제, 유제 중심으로 사용하는 경향을 나타냈다. 한편 단위면적당 농약 사용량은 고추 노지재배 (13.2 a.i.kg/ha), 오이 노지재배 (12.4 a.i.kg/ha), 참외 노지재배 (11.2 a.i.kg/ha) 등에서 많은 농약을 사용하였으나, 수박 시설하우스재배 (1.2 a.i.kg/ha), 참외 시설하우스재배 (2.2 a.i.kg/ha), 딸기 노지재배 (2.8 a.i.kg/ha) 등에서는 매우 작은 양의 농약을 사용하였다. 따라서 농약사용에 대한 조사 및 분석을 지속적으로 수행하여 농약에 대한 위해성을 경감하고, 농업환경의 보존을 반영시키는 정책개발이 수반되어야 할 것이다.

• 한국연초학회지
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• 제5권1호
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• pp.73-78
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• 1983

In order to investigate the relation between weather factors, soil water, and tobacco yield grown by nonnulching and mulehing cultivations, a regression analysis was conducted for data collected from 8 years (1971 to 1978) for a flue-cured variety of Hicks. The soil water was calculated by Smith's method. 1 . Tobacco yield was largely correlated to soil water deficit during draught time for nonmulclung cultivation; $Y=6.146+8.6185\times-0.0925$\times2(R=0.935)^{***})$ 2. Tobacco yield was more largely correlated to soil water in flexible draght time interval than in fixed time interval during maximum growing phase.3. This field test was supposed that the optimal soil water condition was 65%field caps city. In this condition tobacco yield was 197. 1-216.5kg/10a for non-mulching cultivation. But the soil water deficit in draught season was little matter for mulching cultivation. The relation between xield and evaporation during May to June was Y: -1199.55+9.4 353$\times$:O. 0155$\times$2 (R=0.904") Maximum tobacco yield was expected to 223.6-251.4kg/10a for mulching cultivation. 5 . Tobacco required high temperature and light even in drying season (maximum growing phase) for mulching cultivation.tion.

• Journal of Ginseng Research
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• 제48권1호
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• pp.98-102
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• 2024

Background: Ginseng (Panax ginseng Meyer) is a perennial plant belonging to the Araliaceae family that is known to have various beneficial effects including improving memory loss and spatial cognitive ability, and anti-cancer and anti-diabetes activity. Its functional benefits also include improving liver function, regulating blood pressure, stress, and providing antioxidant activity. Usually, various agrochemicals are used in cultivating ginseng preventing from many diseases. Methods: FCGP (field cultivated ginseng in pot) was implemented by imitating MCWG (mountain cultivated wild ginseng). Pesticide analysis of pot cultivation was carried out and the contents of bioactive components such as ginsenoside were also analyzed. Results: FCGP ginsenoside content was higher than that of FCG (field cultivated ginseng) and MCWG. FCGP has been shown to have a relatively high antioxidant effect compared with cultivated ginseng. Conclusion: It was confirmed that ginseng can be grown for 6 years without resorting to use of pesticides. In addition, it was confirmed that effective accumulation of physiologically active ingredients such as ginsenoside is possible. Our result represents FCGP is a novel method of pesticide-free ginseng cultivation

• 한국환경농학회지
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• 제34권4호
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• pp.253-259
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• 2015

BACKGROUND: During the off-season, the cultivation of Chinese cabbage and water dropwort is often used to desalinize plastic film house soils. The objective of this study was to verify the effect of double-cropping systems on the salt removal in oriental melon cultivated plastic film house soils.METHODS AND RESULTS: Electrical conductivity (EC) and soluble salt contents were measured in soils collected from plastic film houses of oriental melon cultivation before and after the off-season crop cultivation. Also the same measurements were performed in the next oriental melon season to estimate the desalinization effect of double-cropping systems. During the cultivation of Chinese cabbage under open-field condition, EC_eof surface soil was reduced from 6.0 to 0.8 dS/m. Double-cropping of water dropwort in flooded soil was also efficient in removing the salts accumulated during oriental melon cultivation. In the house soils where salts were removed during the off-season crop cultivation, soil EC_ewas maintained below 3 dS/m during the next oriental melon cultivation season.CONCLUSION: The off-season cropping under open-field or flooded condition was effective in desalinization of plastic film house soils. Since the salt removal effect is not expected to last for several years, the double-cropping system should be introduced every season to maintain soil EC below the critical level.

• 한국작물학회지
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• 제45권4호
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• pp.232-236
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• 2000

To obtain a basic information on the development of effective control strategies for weedy rice in direct seeding rice cultivation, occurrence patterns of weedy rice as influenced by different cultural practices such as cultivation method, water management, seeding time, and tillage were investigated in field or pot experiments. High occurrence of weedy rice was observed in a continuous direct seeding paddy field as compared to machine transplanted one. Based on the percent of weedy rice panicle over three years trial, high ridged dry seeding was highest with 36.9%, followed by wet seeding with 30.9%, water seeding with 14.6% and machine transplanting rice with 0.8%, indicating 97.8% reduction in weedy rice occurrence by machine transplanting rice as compared with high ridged dry seeding. Germination of weedy rice was promoted to 83-94 % when rice panicle was flooded from September 30 to October 10 for 6 days and 74-88% for 9 days on October 20. Weedy rice occurrence was also substantially reduced by delayed seeding on June 10 and intensive tillage. The results suggest that machine transplanting rice be more effective cultural practice than flooding treatment, delayed seeding and intensive tillage when weedy rice problem occurs in direct seeded paddy field.

• 한국유기농업학회지
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• 제13권1호
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• pp.101-112
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• 2005

In order to select the suitable soybean cultivars for paddly field cultivation, growth response and yields characters were investigated with 37 Korean domestic soybean cultivars, in Yeoncheon, Gyeonggi province. The results can be summarized as follows ; When the soybeans were cultivated in paddy field, significant differences were observed in growth responses at each growth stage and yields among the cultivars. Yields of six cultivars, such as Danbaekkong, Paldokong, Pungsannanulkong, Myeongjunamulkong, Saeolkong, and Namhaekong, were less than 200kg/10a, however, seven cultivars, such as Shinpaldalkong 2, Sohokong, Dormikong, keumkangkong, Bukangkong, Dajangkong, and Geomjeongkong 2, showed highest yields ranged from 301~385kg/10a. At V5 stage, highly positive correlation(r=091$^{{\ast}{\ast}}$) was observed between the top dry weight and leaf area while negative correlation was existed between T/R ratio and root dry weight. However, at R2 age, leaf area was correlated with both top and root dry weight while T/R ratio was correlated with leaf area and top dry weight. Thirty-seven soybean cultivars used in this experiments were classified into 3 different clusters based on 19 important agronomic characters, and genotypic properties of the cultivars were similar in each cluster. In results, high yields could be achieved by selected cultivation of suitable soybean cultivars such as Shinpaldalkong 2 which showed early maturation date and highly ripening ratio.

• 한국관개배수논문집
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• 제8권2호
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• pp.45-54
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• 2001

A plenty of wastes by greenhouse cultivation affect soil and water pollution much more than those by rice cultivation in paddy field. The greenhouse on paddy field has been increased dramatically, however their physical information such as the location an