• 제목/요약/키워드: plantain

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미기록 귀화식물: Plantago aristata (Plantaginaceae) (A recently introduced plantain species in Korea: Plantago aristata (Plantaginaceae))

  • 이정호;한동욱;이은주;박종욱
    • 식물분류학회지
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    • 제35권2호
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    • pp.153-159
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    • 2005
  • 절경이과의 Plantago aristata Michx.(국명신칭: 긴포꽃질경이)가 경기도 고양시 한강하구에 자라고 있는 것으로 처음 확인되었다. 이 귀화식물은 선형인 잎(길이 9-20 cm, 폭 5-8 mm), 긴 선형의 포(길이 약 2.5 cm), 큰 흰꽃(직경 4-6 mm)으로 다른 한반도 질경이속 식물들과 구별된다. 북미 원산인 본 종은 인근 국가인 일본과 중국에도 유입되어 퍼져나가고 있는 것으로 보고되어 있다. 확증표본은 서울대학교 석엽표본관(SNU)에 소장하였다.

영랑호, 월함지 및 방어진의 제4기 이후의 식피의 변천 (Late-Quaternary Vegetation in the Lake of Korea)

  • 장정희
    • Journal of Plant Biology
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    • 제25권1호
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    • pp.37-53
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    • 1982
  • Pollen analysis from lake districts, Youngnangho, Wolhamji and Bangeojin, revealed vegetational patterns in Korea. The pollen stratigraphy was divided into five zones, zone L, I, II, IIIa and IIIb for the past 15,000 years. During zone L (earlier than 10,500 yr BP), late-glacial period, Youngnangho was vegetated with a coniferous forest dominated by spruce, larch, haploxylon pine and fir with considerable amount of herbs. Zone I(10,500~7500 yr BP) was predominantly herbaceous vegetationj with significant amount of oak and diploxylon pine. It suggests that the overall environment became milder and drier than late-glacial period. Zone II(7,500~4,000 yr BP), hypsithermal period, showed significant warming condition, indicated by high pollen concentrations of oak, diploxylon pine and hornbeam, and by more diverse flora of deciduous broad-leaved trees than before. Herbs were not an important part of vegetation. Zone III$^a$(4,000~1,500 yr BP) had pine and oak as main elements. Birch increased slightly while hornbeam decreased in this time. It indicates cooling condition. Zone III$^b$(1,5000-present) which can be called pine period showed obvious human interference. Following forest clearance, agriculture was intensified. The beginning of logging and agriculture was discernible by a sudden decline of arboreal species and by considerable amount of rice, buckwheat, sorrel and plantain. Numerous charcoal fragments were observed in zone I and zone III$^b$.

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이비인후, 안, 치아 및 피부증상의 민간요법에 관한 고찰 (Study on the Herb Remedies of ENT, Eyes, Teeth and Skin Problems)

  • 조결자;강현숙
    • 동서간호학연구지
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    • 제1권1호
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    • pp.50-71
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    • 1997
  • The intention of this study is to apprehend the con. tents and methods of herb remedies that are commonly conducted when there are health-problem cases of ENT, eyes, teeth and skin. Methods of this study are divided into two stages : 1) For a period of six months from December 1994 to June 1995, some 40 persons who are believed to be well versed with herb remedies have been randomly chosen, and we made a survey on herb remedies by symptoms: and 2) we have endeavored to make their grounds evident through the studies on literatures with the focus on the basic data collected. Their results are as follows: 1) When one feels a pain in ears, such herb remedies are employed as pouring the vapor into ears, which is made by steaming Alaska pollack, or as applying or wiping with the juices of radish or the ginkgo, or' alum. Applying the radish juice is effective for sterilization and fever removal: and applying the ginkgo juice is effective for cleanliness. But, plastering alum, sesame oil or castor oil, or pouring the vapor of Alaska pollack into ears are perhaps effective but do not have any pharmacologic grounds. 2) When one bleeds at the nose, such kinds of herb remedies are applied as stimulating nose or head with cold water, pressing nose or ridge of nose, or filling up nares with mashed mugworts. In addition, they have utilized garlic or leeks. Such methods as stimulating with cold water or just pressing nose and ridge of nose is based on reasonable grounds, i.e. vasoconstriction and vascular compression ; and applying mashed garlic on the sole of foot is good for the circulation of Qui ; and the use of mugworts and leeks is based upon the pharmacological function of hemostasis. 3) When one feels a sore throat such kinds of herb remedies are employed as gargling or rinsing throat with brine, drinking hot gruel or water, or drinking the juice of mugwort, radish, ginger or Chinese quince. Gargling with brine or drinking the juice of mugwort, radish or ginger is based upon the pharmacological function of pain alleviation, fever removal, and detoxication. 4) When a boil is formed in mouth, such herb remedies are applied as spreading honey, brine or alum water, and taking gall nut, Chinese matrimony vine, lotus root, etc, for drugs. Spreading honey, brine or water that is made by infusing gallnut, Chinese matrimony vine, lotus root is based upon such functions as hematosis, astriction, antibacterial, and antiphlogistic, Alum, eggplant and licorice are said to be effective, but their pharmacological effects have no grounds. 5) When one has conjunctivitis such herb remedies are commonly applied as irrigation with brine and dropping breast milk in eyes. Moreover, such other drugs are used as plantain. shepherd's purse, and purslane, etc. The use of brine, breast milk, plantain, shepherd's purse and purslane is based upon such functions as sterilization, antiphlogistic, disinfection and pain relieving. Eriocaulon sieboldianum, bean stem, bean pod and narcissus leaves are said to be effective, but their pharmacological action have no basis. When one has a stye, such herb remedies are applied as extracting eyelashes, stimulating by a massage of middle finger, third finger or big toe, as well as sear ing with a heated bamboo comb that is fine-toothed. Other than these, plantain and nightshade's nuts are used as drugs for it. Extracting eyelashes corresponds with exclusing suppurative node and draining the stye of pus ; and the use of plantain is based upon disinfection: and nightshade's nuts are said to be effective, however, their pharmacological action has no grounds. 6) For a treatment of toothache, such herb remedies are commonly employed as rinsing mouth with brine and holding cold water or gasoline in the mouth ; and as the drugs that are believed to be effective have been Welsh onion, ginger and castor-oil, plant, etc. The use of Welsh onion is based upon pain killing, antiinflammatory actions, and the use of ginger is based upon detoxication and disinfection ; and seeds of castor-oil plants are said to be effective, but they have no pharmacological basis. 7) When one has hives, such herb remedies are commonly applied as rubbing burned straw in affected parts, exposing to its smoke, rubbing with salt, sweeping down with a broom, and spreading and drinking boiled water of trifoliate orange. The use of cassia tora seeds, walnut, aloe and radish is said to be effective. The use of cassia tor a seeds has the functions of intestinal order, anti-paralysis, etc. The use of walnut has resulted in an increase of blood by invigorating spirits ; and the use of aloe is based upon disinfection, antibiotic, anti-salt, antihistamine and detoxication action. But, the effects of radish juice and straw's smoke have no pharmacological grounds. 8) When one gets a boil, such herb remedies are commonly used as applying a plaster, paste of flour mixed with yolk, soy sauce or honey, as well as spreading pounded elm tree. Other remedies that have been said to be effective are ; heating with mugwort, brine, wild rocambole, aloe, onion, squid's bone, etc. The use of mugwort is based upon pain killing, astringent antiinflammatory and tranquility. Wild rocambole is based upon the generation and maintenance functions of cell-joining textures ; elm tree upon antiphlogistic ; aloe upon fever removal and antiphlogistic ; onion on pain killing, fever removal, antiphlogistic and tranquility ; squid's bone on astriction: and brine or vinegar on sterilization. Pine resin and gardenia seed are said to be effective, but they have no pharmacological basis. 9) When one cuts his skin, such herb remedies are commonly employed as spreading mugwort's juice or squid's bone powder, or pressing the wounds. In addition, kalopanax, onion and fine soil are employed. The use of mugwort, kalopanax and squid's bone is based upon such functions as hemostasis, sedation, pain killing, antibacterial ; and fine soil is said to be effective, but it has no pharmacological basis. 10) When one suffers from whitlow, such herb remedies are commonly utilized as heating with boiled soy sauce, spreading soybean paste, or dipping into eggs, etc. Other drugs that have been employed are onion root, brine, eggplant, potato, loach, etc. The use of onion is based upon pain killing and antiphlogistic functions ; and that of brine upon antiphlogistic function. The use of soy sauce or soybean paste, fomentation, eggplant, potato and loach is said to be effective, but it has no pharmacblogic ground. 11) For the treatment of frostbite, such herb remedies are commonly used as dipping the affected part into frozen soybean sack, using boiled water of eggplant stem, garlic caulis, onion, hot pepper, caulis. Onion is based upon antiphlogistic and tranquility actions garlic upon disintection, metabolic exacerbation, tonic and aphrodisiac actions and the use of eggplant and hot pepper is based upon help blood circulation, dissolution and excretion of waste matters in vein. 12) For the treatment of burn, such herb remedies or drugs are commonly used as cleansing with Korean gin, spreading eggs, cleansing with cold water and soap water ; and as brine, cactus, moss, soybean paste, oil, etc. The cleansing with Korean gin, cold water, soap water, brine, vinegar is based upon cleaning and sterilizing functions ; and the use of cucumber is based upon nu. trition provision, and strengthening of resisting power by adjustment of metabolism. The use of potato, cactus, moss, oil and eggs is said to be effective, but their phamacological functions are not clarified. In view of the above results, we can realize that the drugs that have been employed in herb remedies are quite diverse. However, in regard to majority of herb remedies that have been employed by symptoms, the pharmacological functions of their drugs have not been clarified, and they are merely known as effective. Furthermore, they have not been recorded in the literature as yet ; and we confirm that there have been many herb remedies that were executed without the proper knowlege of their effects. It is now our view that the results of this survey may be utilized for consulting data in regard to the use of herb remedies.

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Nutritional Evaluation of Some Tropical Crop Residues: In Vitro Organic Matter, Neutral Detergent Fibre, True Dry Matter Digestibility and Metabolizable Energy Using the Hohenheim Gas Test

  • Aregheore, E.M.;Ikhatua, U.J.
    • Asian-Australasian Journal of Animal Sciences
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    • 제12권5호
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    • pp.747-751
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    • 1999
  • The Hohenheim in vitro gas test was used to assess the nutritional value of some crop residues of known in vivo digestibility. The crop residues are groundnut shells (GNS) corn cobs (CC); cassava peels (CaP); unripe and ripe plantain peels (UPP, RPP) and citrus pulp/peels (CPP). Compared to other crop residues, crude protein (CP) content of CC was low. Except for CaP and CPP that had low neutral detergent fibre (NDF) and acid detergent fibre (ADF), other residues contained a high amount of cell wall constituents. Net gas production was significantly different among the crop residues (p<0.05). Gas production was highest in CPP followed by CaP. CC, UPP and RPP have the same volume of net gas production, while the least net gas production was in GNS. True dry matter (TDM) digestibility was significantly different (p<0.05) among the residues. GNS was the least in TDM digestibility. CaP, UPP and RPP had similar TDM digestibility values, while the highest TDM digestibility was obtained in CPP. OM digestibility was different among the residues (p<0.05). CaP and CPP had the same ME value while CC, UPP and RPP had close ME values and GNS the least in ME (p<0.05). The potential extent (b) and rate (c) of gas production were statistical different among the residues (p<0.05). The Hohenheim gas test gave high in vitro organic matter (OM) digestibility for CC, CaP, UPP and RPP and CPP. Fermentable carbohydrates and probably available nitrogen in the crop residues influenced net gas production. The results showed that crop residues besides, providing bulk are also a source of energy and fermentable products which could be used in ruminant livestock production in the tropics.

동아시아 질경이 집단의 유전적 다양성과 집단구조 (Genetic Diversity and Population Structure in East Asian Populations of Plantago asiatica)

  • 허만규
    • 생명과학회지
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    • 제23권6호
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    • pp.728-735
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    • 2013
  • 질경이(Plantago asiatica)는 주로 동아시아에 분포하는 풍매화 식물이다. 전분 젤 전기영동으로 이 종의 18개 집단에 대한 알로자임 다양성과 집단구조를 평가하였다. 비록 질경이 집단은 작고 격리되어 있지만, 높은 유전적 다양성을 가지고 있었다. 평균 다형성을 나타내는 유전자좌위의 수는 57.1%였고, 대립유전자좌위당 유전자수는 2.07이였으며, 18개 집단에 대한 이형접합성은 0.201이였다. 풍매화, 혼합적 생식교배계, 큰 집단 크기, 집단 간 높은 유전자 이동, 다산의 특성이 집단 내 유전적 다양성을 설명할 수 있다. 유전적 다양성은 위도와 관련이 있었는데 질경이 집단은 북위 $35^{\circ}3^{\prime}$를 초과하면 유전적 다양성은 현저하게 감소하였다. 반면에 유전적 다양성에 대한 경도 구배는 나타나지 않았다.

Sensitization rates of airborne pollen and mold in children

  • Park, So-Hyun;Lim, Dae-Hyun;Son, Byong-Kwan;Kim, Jeong-Hee;Song, Young-Eun;Oh, In-Bo;Kim, Yang-Ho;Lee, Keun-Hwa;Kim, Su-Young;Hong, Sung-Chul
    • Clinical and Experimental Pediatrics
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    • 제55권9호
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    • pp.322-329
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    • 2012
  • Purpose: Aeroallergens are important causative factors of allergic diseases. Previous studies on aeroallergen sensitization rates investigated patients groups that had visited pediatric allergy clinics. In contrast, we investigated sensitization rates in a general population group of elementary school to teenage students in Incheon, Jeju, and Ulsan. Methods: After obtaining parental consent, skin-prick tests were performed on 5,094 students between March and June 2010. Elementary school students were tested for 18 common aeroallergens, whereas middle and high school students were tested for 25 allergens. The 25 allergens included Dermatophagoides pteronyssinus, Dermatophagoides farinae, pollen (birch, alder, oak, Japanese cedar, pine, willow, elm, maple, Bermuda grass, timothy grass, rye grass, orchard grass, meadow grass, vernal grass, mugwort, Japanese hop, fat hen, ragweed, and plantain), and mold (Penicillatum, Aspergillus, Cladosporium, and Alternaria). Results: The sensitization rates in descending order were 25.79% (D. pteronyssinus ), 18.66% (D. farinae ), 6.20% (mugwort), and 4.07% (willow) in Incheon; 33.35% (D. pteronyssinus ), 24.78% (D. farinae), 15.36% (Japanese cedar), and 7.33% (Alternaria) in Jeju; and 32.79% (D. pteronyssinus), 30.27% (D. farinae), 10.13% (alder), and 8.68% (birch) in Ulsan. The dust mite allergen showed the highest sensitization rate among the 3 regions. The sensitization rate of tree pollen was the highest in Ulsan, whereas that of Alternaria was the highest in Jeju. The ragweed sensitization rates were 0.99% in Incheon, 1.07% in Jeju, and 0.81% in Ulsan. Conclusion: The differences in sensitization rates were because of different regional environmental conditions and distinct surrounding biological species. Hence, subsequent nationwide studies are required.

질경이(Plantago asiatica L.) 에틸아세테이트분획이 흰쥐의 고콜레스테롤혈증에 미치는 효과 (Effects of Ethylacetate Fraction of Plantago asiatica L. on Hypercholesterolemia Induced by High Cholesterol Diet in Rats)

  • 이재준;이정화;정창주;최현숙;이명렬
    • 한국식품저장유통학회지
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    • 제12권6호
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    • pp.624-630
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    • 2005
  • 질경이의 생리활성 효능을 구명하기 위하여 in vitro에서 HMG-CoA reductase 저해활성과 고콜레스테롤혈증 유발식이를 급여한 흰쥐에서 고콜레스테롤혈증 개선효능을 검토하여 다음과 같은 결과를 얻었다. 1. In vitro에서, 질경이 에탄올추출물 분획의 HMG-CoA reductase저해활성을 대조군과 비교한 결과, 에틸아세테이트 분획이 $42.1\%$로 가장 우수하였다. 2. 고콜레스테롤혈증 유발 식이만을 급여한 군은 정상군에 비하여 체중증가율이 높았으나 질경이 에틸아세테이트 분획을 병합투여로 감소하는 경향을 나타냈으며, 특히 질경이 에틸아세테이트 분획 다량 투여군(140mg/kg)이 유의성 있는 감소효과를 나타내었다. 3. AST 및 ALT활성은 고콜레스테롤혈증 유발 식이 급여로 정상군에 비하여 유의하게 증가됐으나 질경이 에틸아세테이트 분획 병합투여로 증가된 활성이 감소되었고, 그 효과는 다량 투여군에서 더 우수하였다. 4. 혈청 중 총콜레스테롤 및 중성지방 함량은 고콜레스테롤 혈증 유발 식이 급여로 정상군에 비하여 큰 폭으로 증가됐으나 질경이 에틸아세테이트분획 병합투여로 유의하게 감소되었고 고콜레스테롤혈증 유발 식이 급여로 다량 감소된 인지질 함량은 질경이 에틸아세테트 분획 병합투여로 정상군에 근접하게 증가되었다. 5. 유리콜레스테롤 및 콜레스테릴 에스테르 함량은 고콜레스테롤혈증 유발 식이 급여로 정상군에 비하여 크게 증가됐으나 질경이 에틸아세테이트 분획 병합투여로 유리콜레스테롤 함량의 경우 정상군보다 오히려 더 낮았고, 콜레스테릴 에스테르 함량은 유의하게 감소는 됐으나 정상군의 함량에는 미치지 못했다. 총콜레스테롤에 대한 콜레스테릴 에스테르의 비율은 고콜레스테롤혈증 유발식이 급여로 정상군에 비하여 $13\%$이상 증가됐으나 질경이 에틸아세테이트 분획 병합투여로 대조군에 비하여 $1-7.5\%$가 감소되었다. 6. LDL-콜레스테롤 함량은 고콜레스테롤혈증 유발 식이급여로 정상군보다 $90\%$이상 증가됐으나 질경이 에틸아세테이트분획 병합투여로 유의하게 감소되었고, HDL-콜레스테롤 함량은 콜레스테롤혈증 유발 식이 급여로 정상군에 비하여 $34.1\%$가 감소됐으나 질경이 에틸아세테이트분획 병합투여로 감소된 HDL-콜레스테롤 함량이 유의하게 증가되었다. 고콜레스테롤혈증 유발식이 급여로 $524\%$가 증가된 동맥경화지수는 질경이 에틸아세테이트 분획 병합투여로 대조군에 비하여 $40.2\%,\;51.2\%$가 감소됨으로써 동맥경화 발병 위험율이 대조군에 비하여 감소되었다. HDL-콜레스테롤 함량/총콜레스테롤 함량 비는 고콜레스테롤혈증 유발 식이 급여로 정상군보다 $73.9\%$가 감소됐으나 질경이 에틸아세테이트 분획 병합투여로 대조군에 비하여 유의한 증가를 나타냈다.

포도나무 줄기혹병균에 대한 약용식물의 항균활성 및 병발생억제 (In vitro and In vivo Antimicrobial Activities of Medicinal Plants against Crown Gall in Grapevine)

  • 김은수;윤해근
    • 원예과학기술지
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    • 제34권4호
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    • pp.537-548
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    • 2016
  • 항암, 항산화, 항균 활성을 나타내는 9종의 약용식물을 이용하여 포도나무 줄기혹병의 억제효과를 조사하였다. 공시한 식물 중에서 개똥쑥(15mm), 맨드라미의 꽃(27mm)과 잎(13mm), 여주의 미성숙 열매(22mm), 상사화 꽃(7mm), 질경이의 꽃(14mm)과 종자(16mm), 초석잠의 뿌리(13mm), 복숭아 나무의 수지(10mm) 추출물 등이 줄기혹병균(Rhizobium vitis)에 대해 항균활성을 나타내었다. 항균활성의 분획물의 최소억제농도를 확인한 결과 개똥쑥, 맨드라미 잎, 여주 미성숙과 분획물은 각각 50,000배, 질경이 꽃 분획물은 10,000배 희석액이 최소억제농도(MIC)로 확인되었다. 개똥쑥, 맨드라미 꽃과 잎, 여주의 미성숙 열매 추출물의 항균활성물질을 column chromatography와 thin layer chromatography(TLC)를 통하여 분획하였다. 핵산/에틸아세테이트와 메탄올/클로로포름(20:80, v/v)으로 전개한 TLC 분석에서 개똥쑥 추출물에서는 Rf 0.36, 0.69, 0.75, 0.84, 0.94, 맨드라미 꽃 추출물은 Rf 0.96, 0.99, 맨드라미 잎 추출물은 Rf 0.92, 0.97, 여주의 미성숙열매 추출물은 Rf 0.85에서 항균 활성의 분획을 획득하였다. 개똥쑥, 맨드라미 잎, 여주 미성숙 열매 추출물을 물에 희석(500, 1,000, 2,000배)하고 온실에서 R.vitis를 접종한 '거봉' 식물체에 7일 간격으로 관수한 결과, 개똥쑥 희석액은 100%, 맨드라미 잎 추출물(500배 희석액)은 67%, 여주 미성숙 열매 추출물(500배 희석액)은 83.3%의 억제효과를 나타내었다. 이러한 연구 결과는 약용식물 추출물이 포도나무 줄기혹병을 방제할 수 있는 친환경 제제로서의 적용가능성을 제시한 것이라 할 수 있다.

캔터키블루그래스 잔디에서의 제초제와 비료의 단독과 혼용처리에 의한 잡초방제 (Weed Control by Herbicides and Fertilizers Applied Separately or Combined on Kentucky Bluegrass Lawn)

  • 다이엥리;컬크호와트
    • 아시안잔디학회지
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    • 제21권1호
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    • pp.69-79
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    • 2007
  • 잔디밭 관리 시 제초제와 비료의 혼합 처리는 시간 절약 및 답압 감소 등 여러 가지 장점이 있다. Weed & Feed는 제초제와 비료를 혼합 조제한 제품이다. 본 실험은 캔터키 블루그래스 잔디밭에서 비료 및 제초제를 단독으로 처리할 때와 Weed & Feed를 사용할 경우 그 효과를 비교하기 위해서 시작되었다. 실험에 사용한 Weed & Feed 28-3-3에는 세 가지 제초제 - 2,4-D 0.64%, MCPP 0.31% 및 dicamba 0.03%가 혼합 조제된 약제이다. 첫 번째 처리는 5월에 실시하였고, 두 번째 처리는 6월 또는 9월에 실시하였다. 단독으로 사용한 제초제는 2,4-D(LV-4, 4EC), MCPP(4EC) 및 dicamba(Clarity, 4EC)로 Weed & Feed의 50% 및 100% 수준으로 적용하였다. 실험기간 동안 우점 잡초는 민들레였으며, 제2 우점종은 2004년에는 엉컹키, 2005년에는 왕질경이로 나타났다. 실험결과 5월과 6월에 비료와 100% 수준의 제초제를 처리할 경우 수용할 수 있는 잔디밭 품질 유지기간은 각각 112.3일과 83.7일 정도로 나타났다. 하지만 Weed & Feed를 사용할 경우에는 각각 58.7일과 83.7일로 나타났다. Weed & Feed 효과는 사용 시기에 따라 차이는 있지만 비료와 100% 수준의 제초제를 처리한 것과 유사한 효과가 있는 것으로 나타났다. 잡초방제 시 Weed & Feed에 비해 비료와 100% 수준의 제초제를 직접 처리하는 것은 Weed & Feed를 사용하는 그 이상의 효과가 있는 것으로 나타났다.

논에서의 질소 및 인의 농도와 유출입 (The Concentration and Input/Output of Nitrogen and Phosphorus in Paddy Fields)

  • 신동석;권순국
    • 한국환경농학회지
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    • 제9권2호
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    • pp.133-141
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    • 1990
  • 호소(湖沼)의 수질관리 및 예측에 필요한 기초자료로서 농경지로부터의 오염부하량(汚染負荷量)을 제시할 목적으로 1989년 5월 8일부터 9월 30일까지 벼의 생육기간에 정남면 소재 29.3ha의 논에서 질소와 인을 조사 분석한 결과를 요약하면 다음과 같다, 1. 대상지구로 유입된 관개량은 715mm로서 강우량의 영향을 많이 받았다. 침투수량은 318mm로서 관개와 강우로 인한 담수유무(湛水有無)에 따라, 지표유출 수량은 1060mm로서 관개량과 강우량에 따라 월별로 큰 변화를 보였다. 2. 년간 살포된 비료의 양은 질소로서 180kg/ha, 인으로서 46kg/ha이었다. 조사기간동안 관개수에 의한 유입은 TKN이 15kg/ha, TP가 10kg/ha이었는데, 5, 6월에 특히 많은 유입을 보이는 것은 이 시기에 관개량이 많았고 저수지의 준설(浚渫)로인하여 관개수에 질소 및 인이 흡착된 토입자가 포함되어 그 농도가 높았기 때문으로 사료 된다. 3. 지표유출량은 조사기간 동안 TKN이 39kg/ha, TP가 9kg/ha로 나타났다. 침투유출량은 TKN이 7.5kg/ha, TP가 2kg/ha를 보였다. 두 값 모두 5, 6월에 큰 값을 보이는 이유는 관개수에 의한 유입과 시비로 인한 영향으로 판단된다. 4. 하천에서 유하거리(流下距離)에 따른 영양물질 변화는 WS1에서 TKN이 0.31mg/L/km(0.04g/km), TP가 0.01mg/L/km(0.004g/km)의 감소를 보였고 WS2는 TKN이 0.84mg/L/km(0.24g/km), TP가 0.11mg/L/km(0.10g/km)의 감소를 보였다. WS2가 WS1보다 유거연장(流距延長)이 짧지만 더 큰 감소를 나타낸 것은 사행이 더 심하고 하상기복이 커서 유속이 작기 때문인 것으로 사료된다. 5. 농경지로부터 하천이나 호수(湖沼)로 유입되는 오염물질(汚染物質)의 양(量)을 저감하기 위해서는 비료의 사용량을 제한하거나, 배수로(排水路)와 하천에 보 같은 구조물을 설치하여 유속을 줄이므로서 영양물질을 침전시키거나, 영양(營養)물질을 많이 소비하는 식물을 재배하여 자정작용의 기회를 확대시켜야 할 것으로 사료된다.

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