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토성별 수레국화 (Centaurea cyanus L.)의 녹비수량 및 질소생산량
조현숙(Hyeoun-Suk Cho),성기영(Ki-Yeung Seong),박태선(Tae-Seon Park),서명철(Myung-Chul Seo),전원태(Weon-Tai Jeon),강항원(Hang-Won Kang),이혜진(Hye-Jin Lee) 한국토양비료학회 2012 한국토양비료학회지 Vol.45 No.4
수레국화는 초롱꽃목 국화과의 한해살이풀 또는 두해살이풀로 가을과 봄에 파종이 가능한 작물이다. 수레국화 꽃은 파란색, 분홍색, 연분홍색 등 다양하며 주로 봄부터 가을까지 개화가 가능하다. 이 작물은 종종 지역 축제 현장에서 아름다운 경관을 조성하고 있는데 수레국화 단독으로 재배되거나 양귀비와 혼합하여 재배되기도 한다. 따라서 경관조성이 가능한 작물인 수레국화의 녹비 수량과 개화특성을 조사하여 농경지의 이용 가능성을 검토하고자 사토, 사양토, 양토, 식양토 4개의 토성에 가을과 봄에 파종하여 시험을 수행하였다. 수레국화의 4개의 토성의 평균 월동율은 58.7%였으며 사토에서 가장 좋았다. 수레국화가 개화된 이후의 질소함량은 15.0 g ㎏?¹이었고, T-C는 409.2 g ㎏?¹이었으며, C/N율은 28.6이었다. 수레국화 파종시기에 따른 녹비의 건물수량은 가을파종보다는 봄파종에서 더 많았으며 토성별로는 봄파종, 가을파종 모두 식양토에서 가장 많았다. 수레국화의 초장은 가을 파종시 52.8~73.6 ㎝였고, 봄파종은 35.5~79.2㎝ 로 파종시기보다는 토성간에 차이가 더 컸다. 수레국화의 개화시기는 가을 파종시 5월 17~20일이었고 봄파종은 6월 19~20일로 가을 파종했을 때 약 30일정도 빨랐다. 수레국화의 부위별 질소함량은 잎에서 가장 많았으며 개화시기별로는 개화 직전에 21.9 g ㎏?¹로 가장 높았으나 개화 이후 점차 감소되었다. 수레국화가 개화된 이후 이용할 경우 봄파종보다는 가을 파종할 때 더 다양한 후작물과 조합이 가능하였다. 따라서, 녹비수량, 개화시기, 후작물과의 작부체계를 기준으로 볼 때 수레국화는 가을에 파종하여 이용하는 것이 더 유리하였다. Experiments were conducted to find out the landscape effects and green manure production at the same time in farmland. Cornflower was grown in different soil texture with sand, sandy loam, loam, clay loam, and was sowing with autumn and spring respectively. The overwintering rate of cornflower was at 58.7% in average, and the treatment at sand soil showed 62.1% that was highest among other soils, which cornflower is possible to winter landscape crop. After flowering of cornflower, the contents of total nitrogen (T-N) and total carbon (T-C) in plant were 15.0 and 409.2 g ㎏?¹, respectively, and the carbon-nitrogen ratio (C/N) was 28.6. The yield of cornflower biomass, which will be returned to soil as green manure, recorded 1,210~3,920 ㎏ ha?¹ at the spring seeding higher than the autumn seeding as 1,540~3,170 ㎏ ha?¹, and the biomass treated by soil texture were showed that the treatments at the clay loam had been the largest yields both spring and autumn seeding among at other treatment of soil. The heights of cornflower regardless of soil treatments were 52.8 to 73.6 ㎝ at the autumn seeding and 35.5 to 79.2 ㎝ at the spring seeding although it was more significant variation at the soil textures than the seeding periods. The flowering periods of cornflower ranged from 17<SUP>th</SUP> to 20<SUP>th</SUP> in May at the autumn seeding and from 19<SUP>th</SUP> to 20<SUP>th</SUP> in June at the spring seeding, which was faster 30 days approximately at the autumn seeding than the spring seeding. In a view of the cornflower application as green manure after flowering, the autumn seeding, when considered to combine with following crops, was more suitable and various than the spring seeding, even though the yield at spring seeding was higher than one at autumn seeding.
조현숙(Hyeoun-Suk Cho),성기영(Ki-Yeung Seong),박태선(Tae-Seon Park),서명철(Myung-Chul Seo),전원태(Weon-Tai Jeon),양운호(Woon-Ho Yang),강항원(Hang-Won Kang),이혜진(Hye-Jin Lee) 한국토양비료학회 2012 한국토양비료학회지 Vol.45 No.6
녹비작물은 토양에 환원하여 이용하면 화학비료 절감, 토양의 물리화학적 특성 개량, 토양유실방지, 경관조성 등 다양한 역할을 수행한다. 녹비작물을 농경지에 환원하는 과정에서 발생될 수 있는 탄소 변화를 알아보고자 논토양에 녹비보리, 헤어리베치, 헤어리베치/보리, 화학비료구를 처리하였다. 겨울동안 녹비작물을 통하여 흡수된 탄소량은 헤어리베치는 1.22 ton ha<sup>-1</sup>, 녹비보리는 1.24 ton ha<sup>-1</sup>이었으며 헤어리베치/보리 혼파구는 1.54 ton ha<sup>-1</sup> 이었다. 토양 탄소함량은 벼 이앙 7일전에 가장 높았으며 이후부터 점차 낮아져 수확기까지 비슷한 경향이었다. 녹비종류별로는 헤어리베치와녹비보리구에서 헤어리베치/보리 혼파구보다 높았다. 메탄 발생량은 모든 처리에서 이앙 후 7일에 가장 높았으며, 녹비환원구에서 화학비료구보다 약 17 ~ 25배 더 많았다. 녹비종류별 메탄 발생량은 헤어리베치, 헤어리베치/보리, 녹비보리순이었다. 벼 식물체의 탄소 흡수량은 벼 재배기간 동안 계속 증가하였으며 녹비종류별로는 차이를 보이지 않았다. 수확기의 정조와 볏짚 생산량은 녹비환원구에서 화학비료구보다 5 ~ 13% 많았으며 특히 헤어리베치/보리 혼파구에서는 14.07 ton ha<sup>-1</sup>으로 가장 많이 생산되었다. A green manure crop were used in many ways, such as for reducing chemical fertilizer, improving physical and chemical properties of soils, protecting soil loss, and creating landscape when it"s grown in agricultural land. Experiments were conducted to find out carbon emitted with applying green manure crops in paddy field. Amounts of carbon absorbed in the green manure crops during the winter were 1.22 ton ha<sup>-1</sup> in hairy vetch, 1,24 ton ha<sup>-1</sup> in barley, and 1.54 ton ha<sup>-1</sup> in hairy vetch/barley. The soil carbon content was the highest at days before transplanting of rice and decreased after days after harvesting the plant. Soil carbon contents were higher with hairy vetch or barley treatment than with hairy vetch/barley treatment. The content of emitted methane (CH<sub>4</sub>) was the highest at 7 days after transplanting rice plant, and was 17 ~ 25 times higher with green manure treatments than with chemical fertilizer application. The CH<sub>4</sub> emission was the highest with hairy vetch treatment and than followed by hairy vetch/barley and barley treatments. The content of carbon absorbed in rice plant increased during the cultivation period but was not different with the applications of different green manure crops. The yield amounts of rough rice and rice strow were 5 ~ 13% higher with the green manure treatments than the chemical fertilizer application. In particular, they were the highest with hairy vetch/barley treatment as 14.07 ton ha<sup>-1</sup>.
녹비보리와 헤어리베치 토양투입에 따른 벼 수량 및 토양특성
조현숙(Hyeoun-Suk Cho),박우영(Woo-Young Park),전원태(Weon-Tai Jeon),성기영(Ki-Yeung Seong),김충국(Chung-Guk Kim),박태선(Tae-Seon Park),김재덕(Jae-Deok Kim) 충남대학교 농업과학연구소 2011 농업과학연구 Vol.38 No.4
This study was conducted at Korea"s typical soil, loamy soil, to figure out the effect of how barley green manure (B), hairy vetch (HV) and the mixed-planting hairy vetch with barley green manure (HV/B) affecting on the yield of rice, usage of nutrient and soil characteristics. Supplying amount of nitrogen from HV, HV/B and B were 172.8 kg ha<SUP>-1</SUP>, 64.3 kg ha<SUP>-1</SUP> and 38.6 kg ha<SUP>-1</SUP>, respectively. Hairy vetch had the highest plant height and SPAD of rice and next was hairy vetch/barley, chemical fertilizer (CF), none fertilizer (NF), and green manure barley. The amount of rice yield was 5.51 ton ha<SUP>-1</SUP> with HV, and 4.24 ton ha<SUP>-1</SUP> with HV/B. The chemical characteristics of soil showed lower pH and exchangeable cations (Ca and Mg) at B, HV and HV/B plot rather than that of chemical fertilizer (CF) plot. However, the physical characteristics of soil and the porosity rate showed better tendency at the green manure crops than CF. Nitrogen nutrient balance was showed the most balanced at CF, otherwise field of application of green manure crops were required the appropriate nutrition management if future crops would be cultivated because nitrogen nutrient could be devastated or accumulated.
연구보문 : 바이오에너지 생산을 위한 헤어리베치 피복 옥수수 무경운재배 시 재식밀도와 시비량에 따른 생육 및 수량
김충국 ( Chung Guk Kim ),조현숙 ( Hyeoun Suk Cho ),전원태 ( Weon Tai Jeon ),성기영 ( Ki Yeung Seong ),정광호 ( Kwang Ho Jeong ),최봉수 ( Bong Su Choi ),조영손 ( Young Son Cho ) 한국국제농업개발학회 2011 韓國國際農業開發學會誌 Vol.23 No.1
This study was conducted to develop no-till cultivation system and to reduce agro-chemicals input by cut mulching of hairy vetch on corn cultivation for bio-energy production. Corn was sown with 2 planting density (71,430 and 125,000 plants ha-1) on 20 May in 2009 under no-till cultivation with cut mulching of hairy vetch. In no-till corn cultivation with cut mulching of hairy vetch, the plant height, diameter of main stem and SPAD value decreased with increasing the planting density. Ear position of corn was high and silking date of corn cultivated in cut mulching of hairy vetch was also delayed average 3 days as compared with the conventional practice, and it was associated with increasing the plant density and reducing the fertilizer application level. Moreover, dominant weeds in corn cultivation field were Persicaria blumei, Digitaria ciliaris (Retz.) Koel. and Echinochloa crusgalli, and the dry weight of weed decreased with increasing the soil cover rate of hairy vetch. Amount of the bio-ethanol production in cut mulching of hairy vetch decreased by 10.2 to 41.1% and it seemed to be associated with increasing the plant density and reducing the fertilizer application level. At no-till corn cultivation with cut mulching of hairy vetch for bio-energy production, the biomass production of combined system of reducing fertilizer application level of 50% and the planting density of 125,000 plants ha-1 would be similar to the conventional one and it could be suitable for eco-friendly bio-energy corn production.