• 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.

Optimal Levels of Additional N Fertigation for Greenhouse Watermelon Based on Cropping Pattern and Growth Stage

  • Sung, Jwakyung;Jung, Kangho;Yun, Hejin;Cho, Minji;Lim, Jungeun;Lee, Yejin;Lee, Seulbi;Lee, Deogbae
    • Korean Journal of Soil Science and Fertilizer
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    • v.49 no.6
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    • pp.699-704
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    • 2016
  • An estimation of optimal requirement of additional N by cropping pattern and growth stage is very important for greenhouse watermelon. The objectives of this study were to estimate an amount of optimal additional N based on growth, N uptake and yield of watermelon. In order to achieve these goals, we performed the study at farmer's greenhouse with a fertigation system and watermelon was cultivated three times (spring, summer and autumn) in 2015. The levels of additional N were set up with x0.5, x0.75, x1.0 and x1.5 of the $NO_3$-N-based soil-testing N supply for watermelon cultivation. The trends of growth and N uptake of watermelon markedly differed from cropping pattern; spring (sigmoid), summer and autumn (linear). The yield of watermelon was the highest at summer season and followed by autumn and spring. Also, the x1.5N showed a significantly higher yield compared to other N treatments. On the basis of growth, N uptake and yield of watermelon, we estimated an optimal level of additional N by cropping pattern and growth stage as follows; 1) spring (transplanting ~ 6 WAT : 6 ~ 14 WAT : 14 ~ harvest = 5 : 90 : 5%), summer (transplanting ~ 4 WAT : 4 ~ 8 WAT : 8 ~ harvest = 25 : 50 : 25%) and autumn (transplanting ~ 4 WAT : 4 ~ harvesting : 50 : 50%). In conclusion, nutrient management, especially N, based on cropping pattern and growth stage was effective for favorable growth and yield of watermelon.

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.

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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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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ECONOMICS OF SINGLE ANIMAL PLOUGHING IN BANGLADESH : PRESENTATION OF SURVEY RESULTS

  • Rahman, S.M.A.;Sayeed, A.;Alam, J.
    • Asian-Australasian Journal of Animal Sciences
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    • v.5 no.4
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    • pp.709-715
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    • 1992
  • In this study attempts were made to identify the areas of single animal ploughing (SAP) in Bangladesh, causes of its localization and the socio-economic constraints hindering the expansion of the system. To determine the areas of single animal ploughing, 123 upazilas of 15 districts were surveyed. Of them, 16 upazilas were found heavily engaged with this system. A detailed investigation of 469 SAP and 439 double animal ploughing (DAP) farmers revealed that there was significant difference between the two systems in respect of cost of production and yield per unit of land. The benefit/cost (B/C) ratio was higher in SAP system. However, no significant difference was observed in respect of time required for ploughing, intensity of cropping, cost of implements, and cost of repairing implements (except yoke). The study recommends for expansion of SAP system in areas where buffaloes are concentrated. Fro this purpose, logistic and institutional supports need to be made available.