• Title/Summary/Keyword: Soil salt

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Comparison of Dry Matter and Feed Value of Major Summer Forage Crops in the Reclaimed Tidal Land (간척지에서 주요 여름사료작물의 건물생산성 및 사료가치 비교)

  • Shin, J.S.;Kim, W.H.;Lee, S.H.;Yoon, S.H.;Chung, E.S.;Lim, Y.C.
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.24 no.4
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    • pp.335-340
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    • 2004
  • This experiment was conducted to compare the dry matter yields and feed values of summer forage crops such as two cultivars of Maize, two cultivars of Sorghum hybrid and one Japanese millet at the Dae-Ho reclaimed tideland, Korea from 2002 to 2003. Seasonal changes of soil salt content maintained somewhat low at early stage and increased at growing stage and then decreased at harvest time. The dry matter yield was 6,102, 4,557 and 2,928 kg/ha, respectively, for Japanese millet Sorghum hybrid and Maize. The highest Crude protein(CP) content was recorded in sorghum hybrid. Neutral detergent fiber.(NDF) and acid detergent fiber(ADF) contents were highest in Japanese millet following Sorghum hybrid and Maize in turn. The highest sodium content in plant tissue was recorded in Japanese millet. These results suggest that Japanese millet is the most suitable summer forage crops for cultivation on reclaimed tideland in view of the good emergence and forage production.

Studies on the Adaptability of Introduced Species from Australia for Grassland Establishment on Saline Land (Part II) (간척지(干拓地) 초지조성(草地造成)을 위(爲)한 도입호주품종(導入濠州品種)의 적응성(適應性) 조사(調査)에 관(關)한 연구(硏究)(제(第)II보(報)))

  • Kwon, Soon-Ki;Kim, Yong-Kook
    • Korean Journal of Agricultural Science
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    • v.4 no.1
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    • pp.61-65
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    • 1977
  • To select some salt tolerant pasture species for grassland establishment on the west coastal saline land in Korea, this work was carried out from March to October in 1976 with 5 pasture seeds mainly were introduced from Australia. On the soil salt content was 0.4%, all seeds germination were failure, but all species were survived on the 0.2% salt content land. The yield of forage were much better from Kikuyu grass and Pearl millet but poor from other species. The Meadow grass could be used for protect soil erosion by lot of tillers. By the result from this experiment, only Kikuyu grass and Pearl millet were possible to use for forage crops. But to continue this work, it is suggested to introduced more effective species such like Saltwater couch, Saltshore ryegrass, Puccinella, Salt bush, Blue buch, Samphire and so on.

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The Study on the Limiting Factor to Determine Available Soil Depth in Korea (우리나라 토양의 유효토심 결정시 저해인자에 관한 연구)

  • Hyun, Byung-Keun;Rim, Sang-Kyu;Jung, Sug-Jae;Sonn, Yeon-Kyu;Song, Kwan-Cheol;Noh, Dae-Cheol;Lee, Heob-Seung;Hyun, Geun-Soo;Zhang, Yong-Seon;Hong, Suk-Young;Park, Chan-Won;Kim, Lee-Hyun;Chol, Eun-Young;Jang, Byeong-Chun
    • Korean Journal of Soil Science and Fertilizer
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    • v.41 no.5
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    • pp.293-302
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    • 2008
  • The limiting factors to determine available soil depth were studied with 390 soil series in soil profile description and physicochemical data in Korean soils. The limiting factors were coarse sandy layer, gravel and skeletal layer, hardpan layer, cat clay layer, poorly drained layer, salt accumulated layer and bed rock layer so on. The soils of having limiting factors were 332 soil series, but soils without limiting factors were 58 soil series. Soils with limiting factors were, hardpan 5, slopeness 93, immature soil 29, cinder 5, sandy 42, gravel or skeletal 47, bedrock 19, high salt content 8, poorly drained soil 22, heavy clay 32, sulfate soil 3 and ash soil 27 etc. And the orders of available soil depth were immature > slopeness > ash > heavy clay > sandy > gravel or skeletal > hardpan > cindery > poorly drained > bedrock > acid sulfate soil > salt accumulated soil etc.

Effect of Chelating Agents on the Grwoth of Chinese cabbage and Availability of Nutrients in Plastic Film House Soils (시설재배지에서 킬레이트제 처리가 양분 유효도와 배추생육에 미치는 영향)

  • Kim, Myung-Sook;Kim, Yoo-Hak;Roh, Mi-Young;Kang, Seong-Soo;Yoon, Hong-Bae;Lee, Hyeong-Yong
    • Korean Journal of Soil Science and Fertilizer
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    • v.45 no.6
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    • pp.949-954
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    • 2012
  • This study is conducted to evaluate the effects of chelating agents for improving plant growth and reusing accumulated nutrients in soils of plastic film house. Two experiments were carried out at follows: i) The incubation test was conducted using soils treated with 0, 300 mM of EDTA and DTPA to examine the availability of nutrients. ii) For the pot test, chinese cabbages were cultivated in soils with 0, 0.1, 0.5, 1, and 5 mM of EDTA and DTPA to examine the impacts of plant growth response. The application of chelating agents increased ther availability of soil nutrients in the following order: DTPA > EDTA > control. Inorganic concentration of chinese cabbages in DTPA treatments consderably increased in nitrogen, phosphate, iron and aluminium contents than that of the other treatments. The optimal concentration of DTPA for vigorous plant growth as 0.5 mM. Thus, DTPA was more effective than other chelating agents for healty growth of cabbages and the availability of nutrients accumulated in plastic film house.

Comparison of Dry Matter and Feed Value of Major Winter Forage Crops in the Reclaimed Tidal Land (간척지에서 주요 겨울사료작물의 건물생산성 및 사료가치 비교)

  • Shin Jae Soon;Lee Seung Heon;Kim Won Ho;Yoon Sei Hyung;Kim Jong Geun;Nam Jin Woo
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.25 no.2
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    • pp.113-118
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    • 2005
  • This experiment was conducted to compare the dry matter yields and fled values of winter forage crops using too cultivars of Barley, Rye md Italia ryegrass at the Dae-Ho reclaimed tideland, Korea from 2002 to 2004 2rowing season. Soil salt contents of three forage crops showed highest at sowing time, respectively and after wintering continuously lowed till harvest time. The dry matter yield was 6,668.8, 4,455.6 md 2,591.2 kg / ha, respectively, for Italian ryegrass, Barley and Rye. The highest Crude protein(CP) content was recorded in Italian ryegrass. Acid detergent fiber(ADF) contents were lowed in row with Barley, Italian ryegrass and Rye. Sodium contents in plant tissue were recorded high in line with Barley, Italian ryegrass and Rye. results mentions above suggest Italian ryegrass is suitable winter forage crops for cultivation on reclaimed tideland in view of the good emergence, forage production and its feed value.

Changes of Electrical Conductivity and Nitrate Nitrogen in Soil Applied with Livestock Manure (가축분 퇴비 시용에 따른 밭 토양의 EC 및 질산태질소 함량 변화)

  • Hwang, Ki-Sung;Ho, Qyo-Soon;Kim, Hyoung-Deug;Choi, Ju-Ho
    • Korean Journal of Environmental Agriculture
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    • v.21 no.3
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    • pp.197-201
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    • 2002
  • This study was conducted in Jeju Island to find the effects of livestock manure application on the changes in soil salt concentration and $NO_3-N$ contents. Soil samples were collected from Goojua-Tong (volcanic ash soil) and Aewol-Tong(non-volcanic ash soil) to 50 cm depth and were mixed with livestock manure to 20 cm depth in PVC container(30 cm diameter, 1 m height). Animal manures of cattle, pig, and fowl were adjusted to 0, 50, 100,150 ton/ha. Animal manure applications increased the salt concentrations in soil. The salt concentration was increased as the fowl manure amount was increased The effects were larger in order of fowl manure > cattle manure $\fallingdotseq$ pig manure. $NO_3-N$ contents in soil showed a sharp increase by applications of fowl manure, but the increase was slow when the cattle and pig manures were applied. In volcanic ash soil, there was no change in phosphate contents by application of animal manures, but the phosphate contents increased in non-volcanic ash soil with the application of animal manure, especially by fowl manure.

The role of geophysics in understanding salinisation in Southwestern Queensland (호주 Queensland 남서부 지역의 염분작용 조사)

  • Wilkinson Kate;Chamberlain Tessa;Grundy Mike
    • Geophysics and Geophysical Exploration
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    • v.8 no.1
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    • pp.78-85
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    • 2005
  • This study, combining geophysical and environmental approaches, was undertaken to investigate the causes of secondary salinity in the Goondoola basin, in southwestern Queensland. Airborne radiometric, electromagnetic and ground electromagnetic datasets were acquired, along with data on soils and subsurface materials and groundwater. Relationships established between radiometric, elevation data, and measured material properties allowed us to generate predictive maps of surface materials and recharge potential. Greatest recharge to the groundwater is predicted to occur on the weathered bedrock rises surrounding the basin. Electromagnetic data (airborne, ground, and downhote), used in conjunction with soil and drillhole measurements, were used to quantify regolith salt store and to define the subsurface architecture. Conductivity measurements reflect soil salt distribution. However, deeper in the regolith, where the salt content is relatively constant, the AEM signal is influenced by changes in porosity or material type. This allowed the lateral distribution of bedrock weathering zones to be mapped. Salinisation in this area occurs because of local-andintermediate-scale processes, controlled strongly by regolith architecture. The present surface outbreak is the result of evaporative concentration above shallow saline groundwater, discharging at break of slope. The integration of surficial and subsurface datasets allowed the identification of similar landscape settings that are most at risk of developing salinity with groundwater rise. This information is now being used by local land managers to refine management choices that prevent excess recharge and further salt mobilisation.

Status and Change in Chemical Properties of Polytunnel Soil in Korea from 2000 to 2012

  • Kang, Seong Soo;Roh, Ahn Sung;Choi, Seung Chul;Kim, Young Sang;Kim, Hyun Ju;Choi, Moon Tae;Ahn, Byoung Gu;Kim, Hee Kwon;Park, Sang Jo;Lee, Young Han;Yang, Sang Ho;Ryu, Jong Soo;Sohn, Yeon Gyu;Kim, Myeong Sook;Kong, Myung Suk;Lee, Chang Hoon;Lee, Deog Bae;Kim, Yoo Hak
    • Korean Journal of Soil Science and Fertilizer
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    • v.46 no.6
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    • pp.641-646
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    • 2013
  • Chemical properties of agricultural soils in Korea have been investigated at four-year interval in order of paddy, polytunnel, upland, and orchard soils since 1999; polytunnel soils were investigated over the whole country in 2000, 2004, 2008, and 2012. Polytunnel soils were taken from the surface (0-15 cm) and subsurface (15-30 cm) at 2,651, 1,274, 1,374 and 1,374 sites in all provinces of South Korea. One hundred sampling sites located in more than 400 m altitude were additionally investigated in 2008 and 2012. Average of soil chemical properties in 2012 except Jeju province were 6.6 for pH, 3.2 dS $m^{-1}$ for EC, 37 g $kg^{-1}$ for organic matter (OM), 1,049 mg $kg^{-1}$ for available (Avail.) phosphate, 1.58 $cmol_c\;kg^{-1}$ for exchangeable (Exch.) K, 10.6 $cmol_c\;kg^{-1}$ for Exch. Ca, and 3.3 $cmol_c\;kg^{-1}$ for Exch. Mg. Except pH, averages of all chemical properties exceeded the upper limit of optimal range. The median values except pH showed a lower value than the averages. The pH, OM and Exch. Ca had slightly increased from 6.3 to 6.6, from 34 to 37 g $kg^{-1}$, and from 7.7 in 2000 to 10.6 $cmol_c\;kg^{-1}$ in 2012, respectively. The order of sample ratios exceeding the optimal range were Avail. $P_2O_5$ (83%) > Exch. Ca (80%) > Exch. K (70%) > Exch. Mg (65%) > EC (55%) > OM (48%) > pH (29%) in 2012. The order of sample ratios below the optimal range was OM (25%) > Exch. K (25%) > pH (20%), Exch. Mg and Avail. $P_2O_5$ (9%) > Exch. Ca (6%) in 2012. The excessive proportion of pH, Exch. Ca, Exch. Mg and OM slightly increased, while the insufficient proportion of those decreased. Approximately 55% of polytunnel soils exceeding EC 2 dS $m^{-1}$ was evaluated with salt accumulated soils having the risk of growth disorder of crops. Nutrient contents in polytunnel soils in Korea showed high level especially Avail. $P_2O_5$ and Exch. cations. Therefore, recommended fertilization based on soil testing or plant testing is needed for soil nutrient management.

Effects of Ammonium Sulfate and Potassium Sulfate Fertilizer on Dry Matter Yield and Forge Quality of Sorghum X Sudangrsss Hybrid in Reclaimed Tidal Land (간척지에서 수수 X 수단그라스에 대한 유안 및 황산칼리비료 시용효과)

  • Shin Jae Soon;Lee Seung Heon;Kim Won Ho;Kim Jong Geun;Yoon Sei Hyung;Lim Keun Bal
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.25 no.4
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    • pp.245-250
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    • 2005
  • This experiment was conducted to compare the frech and dry matter yields and feed values of Sorghum$\times$Sudangrsss Hybrid in accordance with different nitrogen and potassium fertilizer sources at the Dae-Ho reclaimed tidal land, Korea from 2003 to 2004. Soil salt contents of ammonium sulfate plots(T3, T4, T5) were higher than that of the urea plot(T2), but that of potassium sulfate plot(T6) was the lowest. The fresh yields of ammonium sulfate plots(T3, T4, T5) and potassium sulfate plot(T6) were higher than that of the urea plot(T2) as $173\%,\;173\%,\;144\%\;and\;90\%$. respectively. The dry matter and total digestible nutrient(TBN) yields were similar tendency like the results of the fresh matter yields. The crude protein(CP), neutral detergent fiber(NDF) and acid detergent fiber(ADF) contents of ammonium sulfate plots(T3, T4, T5) were higher than those of urea plot(T2), but those of potassium sulfate plot(T6) were the lowest. On the other hand, TDN content in potassium sulfate plot(T6) was the highest. It was desirable to use ammonium sulfate$(20\~30kg\;N/10a)$ and potassium sulfate fertilizer$(15kg\;K_2O/10a)$ than those of urea and potassium chloride fertilizer on reclaimed tidal land in view of forage production and its feed value.

Native Tree Species of Tolerance to Saline Soil and Salt Spray Drift at the Coastal Forests in the West-Sea, Korea (한국 서해안의 내염성 및 내조성 자생수종)

  • Kim, Do-Gyun
    • Korean Journal of Environment and Ecology
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    • v.24 no.2
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    • pp.209-221
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    • 2010
  • This study was carried out to apply basic data of the native trees for planting in the salinity area by the vegetation ecological selection. Which focused on native woody species to the tolerances of saline soil and salt spray drift on the coastal forests in the West-Sea, Korea. The soil salinity($EC_{1:5}$) was 0.11dS$m^{-1}$, ranging of 0.00dS$m^{-1}$~0.68dS$m^{-1}$. The soil salinity was gradually decreasing from Belt I to Belt Ⅳ except the Belt I in some coastal windbreaks. The order of decreasing soil salinity was Belt I>Belt II>Belt III>Belt Ⅳ and the soil salinity was $EC_{1:5}$ 0.14dS$m^{-1}$, 0.11dS$m^{-1}$, 0.10dS$m^{-1}$, and 0.08dS$m^{-1}$, respectively. The total 181 taxa consisted of 52 families, 104 genus, 157 species, and 24 varieties were recorded as the trees tolerating to both soil salinity and salt spray drift. The trees emerged in the highest degree of salinity($EC_{1:5}$ 0.51dS$m^{-1}$) was nothing but appearanced Pinus thunbergii Parl., Smilax china L., Quercus dentata Thunb. ex Murray, Quercus serrata Thunb. ex Murray and so on at the level of singular and ideal value. The emerged trees in the high salinity of $EC_{1:5}$0.41dS$m^{-1}$~0.50dS$m^{-1}$ were Albizia kalkora Prain, Melia azedarach L., Paederia scandens (Lour.) Merr. var. scandens These species were trees of tolerance to saline soil. The emerged woody species in all belts were Pinus rigida Mill., Pinus densiflora Siebold & Zucc., Pinus thunbergii Parl., Juniperus rigida Siebold & Zucc. and so on. The woody species with high important value(I.V.) were Pinus densiflora Siebold & Zucc., Pinus thunbergii Parl., Pseudosasa japonica (Siebold & Zucc. ex Steud.) Makino, Smilax china L., Platycarya strobilacea Siebold & Zucc. var. strobilacea for. strobilacea and so on, which can be classified as highly tolerant native trees to salt spray drift.