• Title, Summary, Keyword: reclaimed land

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Assessment of Growth and Inulin for Jerusalem Artichoke (Helianthus tuberosus L.) Cultivation in Saemangeum Reclaimed Land and Upland Soils (새만금 간척지와 일반밭 토양에서 뚱딴지(Helianthus tuberosus L.) 재배시 생육 및 이눌린 평가)

  • Oh, Yang-Yeol;Kim, Seung-Yeon;Lee, Kwang-Sik;Ryu, Jin-Hee;Lee, Su-Hwan;Ock, Hee-Kyoung;Jung, Kang-Ho;Kang, Bang-Hun;Kim, Kil-Yong
    • Korean Journal of Environmental Agriculture
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    • v.39 no.3
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    • pp.188-196
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    • 2020
  • BACKGROUND: In order to cultivate upland crops in reclaimed land, economically appropriate crops should be selected. Jerusalem artichoke (Helianthus tuberosus L.) is one of the primary sources for inulin in higher plants. The objective of this study was to evaluate and compare growth and inulin of H. tuberosus L. according to the cultivation region in Korea. METHODS AND RESULTS: 21 varieties of H. tuberosus L. were collected in Korea, and then 7 varieties of H. tuberosus L. were selected for this study. To compare growth and inulin, those varieties were cultivated in reclaimed land and upland soils. The growth of H. tuberosus L. significantly decreased when cultivated in reclaimed land. There was an increas at 17.8% in the content of white H. tuberosus L. tuber inulin in reclaimed land. CONCLUSION: The content of inulin in H. tuberosus L. tubers was found to be dependent on cultivation region and tuber color. There was a difference of the inulin content between the tubers with different colors in reclaimed land. Purple tubers of P20 were considered suitable varieties for cultivation in reclaimed land. White tubers of W1 and W8 were also considered suitable varieties for cultivation in reclaimed land.

Status of soils in reclaimed land (개간지(開墾地) 토양(土壤)에 대(對)한 현황(現況) 조사(調査))

  • Shin, Chun Soo;Rhee, Gyeong Soo;Kim, Jong Deog;Shin, Yong Hwa
    • Korean Journal of Soil Science and Fertilizer
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    • v.7 no.3
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    • pp.137-140
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    • 1974
  • The present-state survey was carried out on reclaimed land of entire country to grasp the farming conditions, soil characteristics and productivities. The results was summarized as follows: 1) Among farmers participating in reclamation, small farmers, which hold land under cultivation less than 1 ha occupied 42 percent of total farmers; while big farmers, hold more than 3 ha, occupied only 11.1 percent. 2) The land use of reclaimed land by reclaimed year had such big variation that mulberry land was decreasing, however, grass land markedly increased. 3) Soils less than 15 percent slope in reclaimed land occupied 68.7 percent of total reclaimed land, and steep sloping land was reclaimed through bench-terraced method, while gently sloping land, through non terraced one. 4) The chemical properties of reclaimed land was very poor, except for phosphate, all element after 10 years of reclamation was under levels of land of cultivation. 5) Amount of fertilizer application to reclaimed land was under that of recommendation. 6) The yield of reclaimed land was 30 to 86 percent of average of land under cultivation.

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An Analysis of Farmers' Acceptability for Light-Weight Greenhouse Constructed on Reclaimed Land (간척지 경량형 온실의 농가 수용성 분석)

  • Lee, Hang-Ah;Hong, Na-Kyoung;Oh, Yun-Mi;Kim, Tae-Kyun
    • Journal of The Korean Society of Agricultural Engineers
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    • v.59 no.6
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    • pp.81-87
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    • 2017
  • The total area of domestic reclaimed lands is 54,379 ha, and among these, 30,394 ha can be agriculturally available. To increase an agricultural availability of reclaimed land, controlled horticultural products that can be highly profitable have come to the fore. However, as being characteristically concerning, when original glasshouse is intactly applied in reclaimed land, it is unsafe on account of ground subsidence and, even if ground were reinforced, it has a problem by high cost. So a new greenhouse model would be necessary taking into account not only cost-efficiency but also safety with relatively light-weight one. Before this, this paper estimated acceptance rate of controlled horticultural complexes in reclaimed land and new greenhouse model for 414 farmers. The annual rental fee is 129,712,500 won/ha, considering the interest rate (2.5 %) of the investment, the depreciation cost of the facilities (straight line depreciation method, 20 years of service life estimated), and government subsidy rate (50 %) which resulted in a sufficient number of intended tenants with the acceptance rate of 0.33. The results of this paper may contribute to the government's policies for reclaimed land.

Screening for Fittest Miscellaneous Cereals for Reclaimed Land and Functionality Improvement of Sorghum bicolor Cultivated in Reclaimed Land (간척지 적응성 잡곡 선발 및 간척지 재배 수수의 기능성 향상 효과)

  • Kang, Chan Ho;Lee, In Sok;Kwon, Suk Ju
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.64 no.2
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    • pp.109-126
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    • 2019
  • Genetic resources of 84 species of Setaria italica BEAUVOIS, Sorghum bicolor, and Panicum miliaceum were collected to select the adaptable miscellaneous cereals in Saemangeum reclaimed land. The adaptability of Sorghum bicolor in reclaimed land was the highest among the three cereals cultivated on reclaimed land. The ratio of the average height of Sorghum bicolor plants cultivated in reclaimed land/normal field was 0.82, that of Panicum miliaceum was 0.61, and that of Setaria italica BEAUVOIS was 0.51. Three species of Sorghum bicolor, Satangdajuk, Kkamansusu, and Nampungcharl, were selected as potential genetic resources as they had excellent adaptability to reclaimed land. The yield of Satandaejuk on reclaimed land was 229.4 kg/10a, and the yield ratio of reclaimed land/normal field was 89.3%. The yield of Kkamansusu was 227.4 kg/10a, with reclaimed land/normal field ratio of 87.8%, and yield of Nampungcharl was 239.6 kg/10a, and reclaimed land/normal field ratio of 86%. In order to study the salt tolerance of selected genetic resources, we conducted salinity test. Salinity tolerance of Sorghum bicolor species-Satangdajuk, Kkamansusu, Nampungcharl was excellent compared to that of the other cereals. Among these, Satandaejuk had to highest salt tolerance level. Polyphenols, flavonoids, and detoxification of free radical were also studied. The anti-diabetic property of the cereals was also analyzed by ${\alpha}$-glucosidase inhibitory activity. We confirmed that the functionality of 3 lines in reclaimed land had improved in all the functional analysis categories when compared to that with yield in the normal field. Polyphenol, an antioxidant, increased in the range of 2~26% when cultivated in reclaimed land and the flavonoid content also increased from 8.5 to 55.6%. DPPH elimination capability, the ability to scavenge harmful reactive oxygen, also increased from 16.7 to 47% when cultivated in reclaimed land. The anti-diabetic activity and ${\alpha}$-glucosidase inhibition activity of selected Sorghum bicolor species-Satangdajuk, Kkamansusu, Nampungcharl also increased from 18.4 to 19.9% when cultivated on reclaimed land.

Effect of Difference in Soil Salinity, Compost and Additional Fertilizer on the Grain Yield and Yield Components of Wheat in the Newly Reclaimed Tidal Lands in Korea (신간척지토양에서 토양염농도, 퇴비 및 추비량 차이가 밀의 수량 및 수량구성요소에 미치는 영향)

  • Sohn, Yong-Man;Song, Jae-Do;Jeon, Geon-Yeong;Kim, Doo-Hwan;Park, Moo-Eon
    • Korean Journal of Soil Science and Fertilizer
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    • v.44 no.5
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    • pp.752-761
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    • 2011
  • Recently, upland crops cultivation instead of paddy crops are more popular and highlighted by increase of social demand in agricultural land use. Especially, wheat cultivation for replacing of import food grain are more interested by government, and it is urgently needed that possibility of wheat cultivation is evaluated in the reclaimed tidal land. Crop cultivation is closely related with soil salinity and cultivation method in the reclaimed tidal land. In order to evaluate possibility of wheat cultivation, effect of different application level of compost and nitrogen additional fertilizer, also soil salinity on the grain yield and yield components of three wheat cultivars was studied at the newly reclaimed Saemangeum and Hwanong tidal lands in Korea. $270-300kg\;10a^{-1}$ of grain yield were obtained at the experimental site in the Saemangeum reclaimed tidal land where soil salinity was less than $4dS\;m^{-1}$ during growing periods from December, 2009 to June, 2010. However, almost no grain yield was obtained at the experimental site in the Hwaong reclaimed tidal land, where soil salinity was more than average $8dS\;m^{-1}$ ranged from 2.0 to $25.9dS\;m^{-1}$ during growing period and then salt demage was severe. Yield was significantly different among application level of compost and nitrogen additional fertilizer in the newly reclaimed Saemangeum tidal land. However, it is considered that three cultivars such as Chopum, Chogyung and Geumgang, have similar sensibility to soil salinity and fertilizer level, because there is statistically no difference among ciltivars in Hwaong and Saemangeum, and also among cultivars in the different levels of compost and fertilizer. Finally, it is concluded that wheat can be possibly produced by reasonable fertilizer application in the Saemangeum reclaimed tidal land, but wheat cultivation is impossible because of high soil salinity in the Hwaong reclaimed tidal land.

Effect of Capillary Barrier on Soil Salinity and Corn Growth at Saemangeum Reclaimed Tidal Land

  • Lee, Sanghun;Lee, Su-Hwan;Bae, Hui-Su;Lee, Jang-Hee;Oh, Yang-Yul;Noh, Tae-Hwan;Lee, Geon-Hwi
    • Korean Journal of Soil Science and Fertilizer
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    • v.47 no.6
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    • pp.398-405
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    • 2014
  • Salt accumulation at soil surface is one of the most detrimental factors for crop production in reclaimed tidal land. This study was conducted to investigate the effect of capillary barriers beneath the soil surface on dynamics of soil salts at coarse-textured reclaimed tidal land. A field experiment was conducted at Saemangeum reclaimed tidal land for two years (2012-2013). Capillary barriers ($3.5{\times}12m$) were treated with crushed-stone, oyster shell waste, coal briquette ash, coal bottom ash, rice hull and woodchip at 40-60 cm depth from soil surface. Silage corn (Zea mays) was cultivated during the experimental period and soil salinity was monitored periodically. Soil salinity was significantly reduced with capillary barrier compared to that of control. Oyster shell waste was one of the most effective capillary barrier materials to control soil salinity at Saemangeum reclaimed tidal land. At the first growing season capillary barrier did not influence on corn growth regardless of types of the material, but plant biomass and withering rate of corn were significantly improved with capillary barrier at the second growing season. The results of this study showed that capillary barrier was effective on the control of soil salinity and improvement of corn growth, which indicated that capillary barrier treatment can be considered one of the best management practices for stable crop production at Saemangeum reclaimed tidal land.

Discussion on Quality of Rice Produced at Reclaimed Tidal Land in Korea and its Soil Characteristics (간척지산 쌀의 미질에 대한 고찰 및 우리나라 간척지 토양의 특성 조사)

  • Lee Seung-Hun
    • KCID journal
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    • v.10 no.1
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    • pp.33-43
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    • 2003
  • This study was carried out to obtain the scientific data as high quality rice produced at reclaimed tidal land. Thus we reviewed related papers and reports and, collected and analyzed 90 soil samples at 9 reclaimed tidal lands in Korea. The results were s

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Constructed Wetland Design Method to Treat Agricultural Drainage from Tidal Reclaimed Paddy Areas (간척지 논 농업배수 처리에 적합한 인공습지 설계 기법)

  • Jang, Jeong-Ryeol;Shin, Yu-Ri;Jung, Ji-Yeon;Choi, Kang-Won
    • KCID journal
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    • v.18 no.1
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    • pp.4-17
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    • 2011
  • The standard design methodology was suggested to construct wetland system for reducing non-point source pollution from Saemangeum reclaimed paddy land. To set for the design flow and concentrations, runoff and water quality survey were conducted during the irrigation period in 2008 at Gyehwa reclaimed paddy land located at near Saemangeum lake. It is rational that 1ha is the optimum constructed wetland size. To meet this size, the moderate drainage area of reclaimed paddy field was 50ha under the conditions that rainfall is 30mm, average runoff coefficient is 0.83, and runoff capture ratio is 0.6. At these condition, the runoff volume from 50ha was 10,520 $m^3/d$ including base flow during irrigation period. To select the optimum wetland system, several case studies were conducted by focusing on the tidal reclaimed land areas having wetland systems in Seokmun. Pond-Wetland system was selected as the standard model because of showing the highest reduction efficiency. Single variable regression equation were delivered to estimate effluent water concentrations from the designed wetland by using long-term monitoring data from the Seokmun experiment site. The effluent concentration from the designed wetland using these equation were showed moderately range.

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Nitrogen Fertilization on the Growth of Rape (Brassica napus L.) in Newly Reclaimed Land in Korea

  • Yang, Chang-Hyu;Kim, Taek-Kyum;Kim, Sun;Baek, Nam-Hyun;Choi, Weon-Young;Lee, Jang-Hee;Jung, Jae-Hyeok;Lee, Yong-Hwa;Kim, Si-Ju;Lee, Kyeong-Bo
    • Korean Journal of Soil Science and Fertilizer
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    • v.44 no.4
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    • pp.597-599
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    • 2011
  • This study was conducted to find out the optimum nitrogen application rate for the stable production of rape in the newly reclaimed land located at Gangwhal region of Saemangum reclaimed land in which the soil is sandy loam (Munpo series). There were five treatments of nitrogen fertilization from zero to 60% increment based on the standard fertilization of $150kg\;ha^{-1}$. The growth of rape (Sunmang) was not affected by salt content while soil salinity was increased at blossoming season of rape. Compared to yield of standard fertilization the yield and the content of oleic acid of rape were increased by 4~26% with the increasing additional nitrogen fertilizer. The results obtained from the growth and yield of rape in this study indicated that it was possible to cultivate rape in a newly reclaimed land if soil salinity was kept below $3dS\;m^{-1}$.

A Study on the Ground Improvement Effective Evaluation of Reclaimed Land Using Cone Penetration Test (CPT를 이용한 준설매립지반의 개량효과 평가에 관한 연구)

  • Kim, Jong-Kook;Chae, Young-Su;Kim, Myoung-Mo
    • Proceedings of the Korean Geotechical Society Conference
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    • pp.910-921
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    • 2004
  • In this study, the pilot tests on the reclaimed land were performed in order to find the suitable construction method with dynamic compaction Type I, Type II at different dynamic energy and hydraulic hammer compaction. The estimation of the compaction through the various pilot tests was performed by the CPT-qc, SPT-N and field density tests. As the result of the pilot tests, it shows that the dynamic compaction method is better than the hydraulic hammer compaction method in the effect of the ground improvement, especially dynamic compaction Type I is much superior to others. When it comes to method for measuring the intensity of the ground, the value of the cone penetration test-resistance(qc) is much suitable for the ground. Besides, the standards for the compaction control, which showed that over 10Mpa at 0 through 5meters in the upper layer and 7Mpa at 5 through 8meters in the lower layer in the CPT-qc, could be found without discrimination of the upper road and lower road on the reclaimed land. And it also found that the intensity of the reclaimed land gets back to the original status in about 10 through 15 days.

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