• 제목/요약/키워드: Saline Soil

검색결과 251건 처리시간 0.043초

Halotolerant Plant Growth Promoting Bacteria Mediated Salinity Stress Amelioration in Plants

  • Shin, Wansik;Siddikee, Md. Ashaduzzaman;Joe, Manoharan Melvin;Benson, Abitha;Kim, Kiyoon;Selvakumar, Gopal;Kang, Yeongyeong;Jeon, Seonyoung;Samaddar, Sandipan;Chatterjee, Poulami;Walitang, Denver;Chanratana, Mak;Sa, Tongmin
    • 한국토양비료학회지
    • /
    • 제49권4호
    • /
    • pp.355-367
    • /
    • 2016
  • Soil salinization refers to the buildup of salts in soil to a level toxic to plants. The major factors that contribute to soil salinity are the quality, the amount and the type of irrigation water used. The presented review discusses the different sources and causes of soil salinity. The effect of soil salinity on biological processes of plants is also discussed in detail. This is followed by a debate on the influence of salt on the nutrient uptake and growth of plants. Salinity decreases the soil osmotic potential and hinders water uptake by the plants. Soil salinity affects the plants K uptake, which plays a critical role in plant metabolism due to the high concentration of soluble sodium ($Na^+$) ions. Visual symptoms that appear in the plants as a result of salinity include stunted plant growth, marginal leaf necrosis and fruit distortions. Different strategies to ameliorate salt stress globally include breeding of salt tolerant cultivars, irrigation to leach excessive salt to improve soil physical and chemical properties. As part of an ecofriendly means to alleviate salt stress and an increasing considerable attention on this area, the review then focuses on the different plant growth promoting bacteria (PGPB) mediated mechanisms with a special emphasis on ACC deaminase producing bacteria. The various strategies adopted by PGPB to alleviate various stresses in plants include the production of different osmolytes, stress related phytohormones and production of molecules related to stress signaling such as bacterial 1-aminocyclopropane-1-carboxylate (ACC) derivatives. The use of PGPB with ACC deaminase producing trait could be effective in promoting plant growth in agricultural areas affected by different stresses including salt stress. Finally, the review ends with a discussion on the various PGPB activities and the potentiality of facultative halophilic/halotolerant PGPB in alleviating salt stress.

간척지 염해답토양의 토성별 제염기간 및 단면특성변화를 기준한 분류학적 고려 (A Taxonomical Consideration based on Changes of Salinity and Profile Features of the Texturally Different Two Reclaimed Tidal Soils)

  • 손연규;현근수;서명철;정강호;현병근;정석재;송관철
    • 한국토양비료학회지
    • /
    • 제39권2호
    • /
    • pp.59-64
    • /
    • 2006
  • 중부 서해안에 분포하는 염해답으로 분류되어 있는 토양에서 간척 후 경작년대의 진척에 따른 토양 특성변화를 구명하고, Soil Taxonomy 분류에 따른 문제점을 검토하며, 염해답에서의 제염 소요년수를 추정한 결과는 다음과 같았다. 1. 간척년대가 오래될수록 토색이 밝아지고, 층위가 발달되며, 토양구조의 형성이 진전되는 경향이며, EC는 감소되는 경향이었다. 2. 식양질인 포승통의 경우 분류기준에 따라 분석한 결과를 Salic 층위를 가지고 있는 것으로 판단되었으며, 광활통 등 사양질 토양의 경우에는 아군단위에서의 sodic 특성을 가지고 있는 것으로 판단되었다. 3. Soil Taxonomy 분류기준을 적영하여 분석하였을때에는 식양질 토양에서는 간척년대가 지속되어도 Na 함량이 기준 이하로 떨어지지 않았으며, 사양질 토양에서는 재배를 시작한지 76된 김제시 광활면 지역에 분포하는 토양에서만 Na 함량이 기준 이하로 떨어져 사질답이라 할 수 있었다. 4. 이용 측면에서 염농도의 피해 기준을 dSmX로 판단할 때 식양질토양은 제염이 되는데 약 108년정도가 소요되었으며 사양질 토양에서는 12년 정도가 소요되었다.

계화도(界火島) 간척지(干拓地) 토양(土壤)의 연도별(年度別) 염분함량(鹽分含量) 변화(變化) (Studies on the Changes of Soil Salinity in the Kyehwa Saline Paddy Soil)

  • 황남열;유정;나종성;오동훈;박건호;최봉주
    • 한국토양비료학회지
    • /
    • 제24권4호
    • /
    • pp.265-271
    • /
    • 1991
  • 계화도(界火島) 간척지내(干拓地內)의 토양염분(土壤鹽分) 변화(變化)를 1978년(年)부터 1988년(年)까지 조사(調査)하였던 바 그 결과(結果)를 요약(要約)하면 다음과 같다. 1. 조사면적(調査面積)2,500ha중(中) 면적분포비율(面積分布比率)은 문포통(文浦統)52.2%, 염포통(鹽浦統)30.2%, 광활통(廣活統)16.2%, 하사통(下沙統)1.0%이였다. 2. 수도경작답(水稻耕作畓)의 제염율(除鹽率)은 문포통(文浦統)세사양토, 광활통(廣活統), 하사통(下沙統), 염포통(鹽浦統) 순(順)으로 높았으며, 무경작답(無耕作畓)의 경우에는 6년차(年次)에 80%이상(以上)의 제염(除鹽)이 이루어 졌으나 그이후(以後)는 변화(變化)가 없었다. 3. 토심별(土深別) 염농도(鹽濃度)의 변화(變化)는 경작(耕作) 초기(初期)('72~'82)에는 표토(表土)보다 심토(深土)(20~40cm)에서 14.9%, 심토(深土)(40~60cm)에서 33.4%가 높았으며 후기(後期)('84~'86)에는 20~40cm와 40~60cm 심토(深土)에서 각각 26.4%, 66.9%가 높았다. 그러나 무경작답(無耕作畓)은 초기(初期)('72~'82)에는 심토(深土)(20~60cm)의 염분(鹽分)이 표토(表土)의 80% 수준(水準)이었다. 4. 계절(季節)에 따른 토양중(土壤中) 염분(鹽分)의 변화(變化) 경작답(耕作畓)에서 영농중(營農中)(여름)과 영농후(營農後)(가을)가 각각 영농전(營農前)(봄)의 52.3%, 62.5% 수준(水準)이었으며, 무경작답(無耕作畓)은 영농중(營農中)와 영농후(營農後)가 각각 영농전(營農前)의 74.8%, 89.9% 로 경작답(耕作沓)보다 높은 경향(傾向)이였다.

  • PDF

서남부 간척지에서 벼 담수표면산파재배시 토양 염농도별 적정 파종량 (Optimum Seeding Rate in Different to Soil Salinity for Broadcasting on the Rice Flooded Paddy Surface at South-western Reclaimed Saline Land of Korea)

  • 백남현;최원영;고종철;박홍규;남정권;박광근;김상수;김보경;김정곤
    • 한국작물학회지
    • /
    • 제51권spc1호
    • /
    • pp.47-51
    • /
    • 2006
  • 서남부 간척지에서 벼 담수표면산파재배시 토양 염분농도별 적정 파종량을 구명하고자 $2003{\sim}2004$년에 걸쳐 호남 농업 연구소 계화도출장소 시험포장인 문포통(세사양토)의 저영답(토양 염농도 0.1%)과 중염답(토양 염농도 0.3%)에서 서간벼를 공시하여 파종량별 입모수, 생육, 수량 및 백미 외관 품위 등을 검토한 결과를 요약하면 다음과 같다. 1. 입모수는 중염답보다 저염답에서 파종량이 증가할수록 많았다. 2. 간장과 수장은 중염답이 저염답보다 파종량이 증가할 수록 짧았으며, 도복은 토양염농도에 상관없이 파종량이 증가할수록 심했다. 3. 완전미 수량은 저염답에서는 파종량 5 kg/10a까지, 중염답에서는 파종량 7 kg/10a까지는 증가되었으나 그 이상의 파종량에 서는 수량이 증가하지 않았다. 4. 백미의 외관상 품위는 파종량이 증가할수록 저염답보다 중염답에서 완전미율이 낮았다. 5. 따라서 서남부 간척지에서 벼 담수표면산파재배시 입모, 벼 생육, 완전미 수량 및 백미의 외관상 품위 등을 고려할 때 적정 파종량은 저염답은 $5{\sim}7kg/10a$, 중염답은 $7{\sim}9kg/10a$이 적당할 것으로 생각된다.

임해매립지의 식재지반별 토양 물리·화학적 특성 (Physico-Chemical Properties of Soils at the Ground of Landscape Planting in Reclaimed Land from the Sea)

  • 김도균
    • 한국환경복원기술학회지
    • /
    • 제4권4호
    • /
    • pp.12-18
    • /
    • 2001
  • This study was carried out to analyze physico-chemical properties of soils at the ground of landscape planting in reclaimed land from the sea on Kwangyang Bay, South Korea. Physico-chemical properties of soils at each planting grounds were tested by ANOVA and were significantly(P<0.01) different. The difference came from the soil properties of the covered soil, the disturbance applied to the soil with land use and the accumulation of organic matter after landscape planting. Soil hardness, pH, ECe, Na and K level were in a stable condition at high then low of ground height for landscape planting. Organic matter accumulation was greater at lower planting grounds then top and slope ground of big mounding. The planting grounds of favorable growth for landscape trees were determined as following order : the slope ground and the top ground of big mounding>the ground of medium mounding>the coved ground of improve soil>the lower ground of big mounding>the filled ground of improve soil.

  • PDF

발표초록 모음

  • Chiao, J.S.
    • 미생물과산업
    • /
    • 제19권2호
    • /
    • pp.49-57
    • /
    • 1993
  • Chenges in respiration of the soils collected from the reclaimed tidal soil in Chogi-ri, Kanghwa Island and treated with organic matters are presented. The measurement of the respiration for the smaples, which were incubated for 0,2,4 and 5 weeks, were carried out by using Warburg's respirometer. While the respirations of the samples added by organic matters were increased 6.7 - 28.0 times compared with that 0 week during the incubation in case of 5-year soil, the respiration in case of 3-year soil were increased 3.3-11.8 times. Thus, the effect of adding organic matters on the respiration of the experimented soils, as this indicates, was much higher for the soil of 5-year area than that of 30-year area. And for the organic matters Salicornia was most effective and then Suaeda and Oryzae. The samples treated with Salicornia and Suaeda showed their highest respiration rate at the 4th week, but the one with Oryzae was measured to increase progressively during 5 weeks experimented. Regarding the salinity, content of organic matters and number of bacteria, in each intact soil experimented, 5-year soil samples had much poor habitat then 30-year soil for the activity of soil microorganisms, but according to the result mentioned above, it is firmly believed that the addition of organic matters on the saline soil is one of the best means to change the reclaimed tidal land into arable land with less time duration.

  • PDF