• Title, Summary, Keyword: Cropping system

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Desalinization Effect of Off-season Crop Cultivation in Long-term Oriental Melon Cultivated Plastic Film House Soils (휴경기 후작물 재배에 의한 참외 장기연작 비닐하우스 토양의 제염 효과)

  • Byeon, Il-Su;Chung, Jong-Bae
    • Korean Journal of Environmental Agriculture
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    • v.34 no.4
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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, ECeof 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 ECewas 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.

Effects of Rape Residue on Nitrogen Fertilizer Reduction in Paddy Soil under Double Cropping System

  • Cho, Hyun-Jun;Hyun, Byung-Keun;Sonn, Yeon-Kyu;Shin, Kook Sig
    • Korean Journal of Soil Science and Fertilizer
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    • v.49 no.1
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    • pp.7-11
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    • 2016
  • Winter crops have been recognized as an alternative to soil management for fertility and crop productivity in paddy soil. Recently, rape has been produced at winter season and there is little research results on reduction of N fertilizer by adding rape residues for rice cultivation. In this study, we investigated the productivity and quality of rice by applying with 0, 27, 63, $90kg\;ha^{-1}$ of N fertilizer after input of rape residues into soil for two years. The highest yield of rice was average $4.68Mg\;ha^{-1}$ at the treatment applied with the $90kg\;N\;ha^{-1}$ with rape residue. It was reduced to N rate from 31.6 to $43.2kg\;N\;ha^{-1}$ in comparison to $4.53Mg\;ha^{-1}$ of maximum yield in treatment added $90kg\;N\;ha^{-1}$ with rape. Amylose content in rice was similar among treatments with/without rape residue, but protein content was lower in treatment with rape residue than in those without rape residue. In conclusion, input of rape residue in rice cultivation could be alternative to reduction of N fertilization and improvement of quality by adjusting rice productivity in paddy soil under cropping system.

Study on High Forage Production in Double Cropping Systems with Barley and Corn at paddy field in Middle Region (청보리-옥수수 작부체계시 조사료 최대생산을 위한 청보리 수확시기 구명)

  • Ju, Jung-Il;Kang, Young-Sik;Seong, Yeul-Gue;Ji, Hee-Chung;Lee, Hee-Bong
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.32 no.3
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    • pp.285-292
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    • 2012
  • This experiment was carried out to determine the harvesting day after heading of barley for highest total forage yield in double cropping with corn at paddy field in middle region. The fresh barley yield was the highest at the harvest of 20 days after heading, but the dry matter yield and TDN yield were the highest at the harvest of 25 days after heading because of higher dry matter rate. The dry matter yield of corn after the harvest of 25 days after heading was decreased about 16 percent than that of the check, sowing on april 25. But total fresh yield of corn monoculture was lower about 31 percent, and decreased 28 percent of dry matter and 23 percent of TDN yield, respectively, than that of the double cropping system with corn and barley. In double cropping system at paddy field, the total forage yield was the highest at the harvest of 25 days after heading of barley and grew corn subsequently. Although yield of corn was reduced by late sowing, the total forage yield was increased by double cropping system compared with corn monoculture.

Effect of Cattle-Manure Application on Soil Chemical Properties and Crop Yields in Rice-Forage Cropping System

  • Lee, Yejin;Yun, Hong-Bae;Sung, Jwa-Kyung;Ha, Sang-Keun;Song, Yo-Sung;Sonn, Yeon-Kyu;Lee, Deog-Bae
    • Korean Journal of Soil Science and Fertilizer
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    • v.47 no.6
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    • pp.553-557
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    • 2014
  • The steady increase in livestock industry has greatly required the stable production of food and forage crops. As an alternative, rice-forage cropping system has been attempted in several southern areas. The present study was performed to understand whether an application of cattle-manure compost affects soil chemical properties and crop productivity in rice-forage cropping system, rice ${\rightarrow}$ summer oat ${\rightarrow}$ rye, in Jangheong county, south Jeolla province from 2013 to 2014. Treatments was composed of control (no compost), CM1 (compost application before rice transplanting), and CM2 (two-times compost application, before rice transplanting and after rice harvest), and inorganic fertilizers (N, P, and K) were equally dressed in all plots. Yields of rice were not significantly different between treatments, however, oat production was 1.25-fold higher in CM1 and CM2. Nutrient uptake amounts of rye were higher in CM2 than CM1 and control. Total nitrogen in soil was maintained stable level during crop cultivation. And soil organic matter contents in all treatments were increased by crop residue. Available P_2O_5$ and exchangeable K were increased by cattle manure application. Therefore, it suggested that the amount of nutrient by forage crop residue should be considered in rice-forage multiple cultivation.

Long-term Impact of Single Rice Cropping System on SOC Dynamics (동일비료장기연용 논에서 토양유기탄소의 변동)

  • Jung, Won-Kyo;Kim, Sun-Kwan;Yeon, Byung-Yul;Noh, Jae-Seung
    • Korean Journal of Soil Science and Fertilizer
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    • v.40 no.4
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    • pp.292-297
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    • 2007
  • Global warming and climate changes have been major issues for decades andvarious researches have reported their impact on our environment. According to recent researches, increased carbon dioxide ($CO_2$) concentration in the atmosphere is considered as a dominant contributor to global climate changes and thus numerous researches were conducted to control $CO_2$ concentration in the atmosphere. Soil management practices, such as reducing tillage intensity, returning plant residues, and enhancing cropping system have recommended for restoring organic carbon into the soils effectively. However, few studies on soil carbon sequestration have reported for Korean paddy soils. Therefore, evaluation of soil organic carbon (SOC) dynamics in the long-term single rice cropping system is essential in order to find out potential capacity of paddy field as a carbon sink source. The objective of this research was to evaluate SOC dynamics on the long-term single rice cropping system. Research was conducted in the research farm at National Institute of Agricultural Science and Technology, Rural Development Administration, Suwon. Long-term phosphorus and potassium fertilization and lime application didn't significantly affect on SOC compared to controls. We found that SOC contents were increased continually at the long-term composting plots with enhanced rate of carbon storage. In conclusion, continuous incorporation of plant residues (i.e., composting) is recommended to effectively sequester soil carbon for Korean paddy soils. This result implies that continuous composting in a paddy field may contributenot only for increasing SOC in the soils but also for mitigating global warming through reducing carbon dioxide emission into atmosphere. Therefore, we recommend that a strategy or policy measures to encourage farmers to return plant residues continuously for mitigation of global warming as well as soil fertility is being developed.

Analysis of Efficiency of Cropping System for Substitute Crops - Focus on Farms with Cropping Systems for Soybeans + Barley - (논타작물 작부체계의 효율성 분석 - 콩+보리 작부체계 농가를 중심으로 -)

  • Um, Ji-bum;Yu, Chan-ju
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.21 no.2
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    • pp.145-150
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    • 2020
  • The provision of information on the profitability and efficiency during the transition from growing rice to substitute crops is an essential task for the proliferation and settlement of the production adjustment system. First, the profitability of the soybean + barley cropping system was analyzed. The average income of the farms with the soybean + barley cropping system surveyed was 868,000 Won, with an income proportion of 55.1%. With earned income that is approximately 1.7 times higher than that of growing only rice, it is determined to be more profitable. Then, the efficiency of the farms was analyzed through DEA analysis. The efficiencies of the farms were found to include the CCR model (0.927815) and the BCC model (0.97544). It was also found that there are 10 CCR and 14 BCC results with an efficiency value of 1. With an efficiency value of more than 0.9 on average, it can be deemed as efficient management in general. In addition, by presenting a proposal for the improvement of inefficient farms, the target value was provided in order for inefficient farms to become efficient farms.

Difference in Weed Population as Affected by a Cropping Pattern in Paddy Field (논 작부체계(作付體系) 양식(樣式)에 따른 잡초발생양상(雜草發生樣相)의 변화(變化))

  • Ku, Y.C.;Yun, S.H.;Park, S.H.
    • Korean Journal of Weed Science
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    • v.5 no.2
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    • pp.137-142
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    • 1985
  • This experiment was conducted to know the difference in weed population in the five cropping patterns kept same for six years from 1976 such as ricebarley, potato-rice, pea-rice, rice-rye, and rice-fallow. More and many weeds were growing in single cropping field than double cropping field. Dominant weed species in pea-rice and potato-rice cropping patterns were M. vaginalis and S. hotarui, M. vaginalis and P. distinctus. Coefficient of similarity of the cropping patterns between pea-rice and potato-rice appeared higher than single cropping system. However, pea-rice and rice-fallow cropping patterns showed low coefficient of similarity.

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Establishment of Effective Cropping System to Reduce the Injuries by Continuous Cropping in Oriental Melon. (참외 연작장해 경감을 위한 작부체계)

  • 박동금;권준국;이재한;최영하;김회태;이순구;한상찬
    • Proceedings of the Korean Society for Bio-Environment Control Conference
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    • pp.24-29
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    • 2003
  • 시설참외 주산지에서는 연작함으로써 뿌리혹선충을 비롯한 각종 토양전염성 병해충의 피해가 많아지고 염류가 집적되는 등 재배상 많은 문제점이 발생되고 있다. 특히 참외를 장기재배하는 농가가 많은 성주 등 경북지역에서는 뿌리혹선충으로 인해 생육이 불량하고, 과실의 착과율이 떨어지는 등 피해가 발생되면 영양결핍증상으로 오인, 계속 추비를 시용함으로써 토양의 염류집적을 가중시키고 있다. (중략)

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Effect of Paddy-upland Rotation System on Soil Chemical Properties and Rice Yield (답전윤환형태별(畓田輪換形態別) 토양화학성(土壤化學性)과 수도생산성(水稻生産性) 변화(變化)에 관(關)한 연구(硏究))

  • Ahn, Sang-Bae;Motomatsu, T.
    • Korean Journal of Soil Science and Fertilizer
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    • v.26 no.3
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    • pp.181-188
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    • 1993
  • The effects of paddy-upland rotation and cropping system on the mineralization of soil organic nitrigen, on the change of organic matter and available phosphorus content in the soil, and on the rice yield and nutrients absorption were studied in Seokcheon fine-sandy loam soil. 1. In the incubation test mineralzed soil nitrogen and the nitrogen extracted by pH 7 phosphate buffer solutions were higher in the soils from every and two year rotation systems than continuous rice cultivation. In terms of cropping system potato-chiness cabbage-rice increased them more than soybean-rice system. 2. The change of soil organic matter and available phosphorus contents were not much in continuous rice cultivation, while in rotation system they decreased as the paddy-upland rotation frequency decreased. In terms of cropping system they decresed more in potato-Chinese cabbage-rice system compared with soybean-rice systems. 3. The rice yield was higher in the paddy-upland rotation system than that of continuous rice cultivation. However, the effects were decreased gradually every year, as shown by 26~20, 17~5, and 5~4% yield increase for first, second, and third year, respectively, in potato-Chinese cabbage-rice and soybean-rice system compared with continuous rice cultivation. 4. All the absorbed nutrient contents increased in every and two year rotation system compared with continuous rice cultivation. In terms of cropping system potato-Chiness cabbage-rice system increased them more compared with soybean-rice system.

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Emission of Green House Gases in the Agricultural Environment -1. The Cropping System and Emission of the Green House Gases-CO2, CH4, N2O)-under Different Cropping System (농작물(農作物) 재배환경(栽培環境)과 지구온난화(地球溫暖化) 원인(原因)가스 발생(發生) -1. 답전전환시(畓田轉換時) 작부체계(作付體系)와 지구온난원인기체(地球溫暖原因氣體) -이산화탄소(二酸化炭素), 메탄, 아산화질소(亞酸化窒素)- 발생(發生))

  • Lee, Sang-Kyu;Suh, Jang-Sun
    • Korean Journal of Soil Science and Fertilizer
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    • v.26 no.1
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    • pp.49-56
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    • 1993
  • The net flux of global green house gases such as carbon dioxide($CO_2$), methane($CH_4$), and nitrous oxide($N_2O$) emitted from the rotation of paddy-upland soil during growing sesaon under different cropping system was determined. The results obtained were summarized as follows : 1. The net flux of $CO_2$ during the growing season was the highest from continuous cultivation of rice but the lowest from rotation cultivation of rice-soybean. Under the different cropping system the highst emission was from soil of continuous cultivation of rice, but the lowest from converted system. 2. The net emission of methane was the highest from the sold of continuous cultivation of rice, but the flux was remarkably decreased by differing the cropping system. 3. $N_2O$ was emitted greatly from the every two year rotation of potato-chinese cabbage and the next rank was from continuous cultivation of rice, but was decreased notably from rotation cultivation of rice-soybean and potato-chinese cabbage under rotation of paddy-upland cropping system. 4. The ratio of oxygen and carbon dioxide in the soil air was much different with glowing season, the ratio was varied with 4~10 percents for oxygen and 1~22 percents for carbon dioxide. The ratio of carbon dioxide was dozens or hundreds times to that of air, and the variation was very high also. 5. The emission of global green house gases such as carbon dioxide, methane and nitrous oxide was affected by the moisture, temperature and nutrients of soils and the growth period of crops.

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