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논문 기본 정보

자료유형
학술저널
저자정보
조희래 (국립농업과학원) 하상건 (국립농업과학원) 현승훈 (고려대학교) 허승오 (국립농업과학원) 한경화 (국립농업과학원) 홍석영 (국립농업과학원) 전상호 (국립농업과학원) 김은진 (충남대학교) 이동성 (충남대학교)
저널정보
한국토양비료학회 한국토양비료학회지 한국토양비료학회지 제43권 제3호
발행연도
2010.6
수록면
260 - 267 (8page)

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초록· 키워드

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As sloped farmland is subject to runoff and soil erosion and consequently require appropriate vegetative coverage to conserve soil and water, a field study was carried out to evaluate the impact of crop canopy coverage on soil loss and runoff from the experimental plot with three different textural types (clay loam, loam, and sandy loam). The runoff and soil loss were examined at lysimeters with 15% slope, 5 m in length, and 2 m in width for five months from May to September 2009 in Suwon (37° 16" 42.67" N, 126° 59" 0.11" E). Red pepper (Capsicum annum L. cv. Daechon) seedlings were transplanted on three different dates, May 4 (RP1), 15 (RP2), and 25 (RP3) to check vegetation coverage. During the experimental period, the vegetation coverage and plant height were measured at 7 day-intervals and then the "canopy cover subfactor" (an inverse of vegetation cover) was subsequently calculated. After each rainfall ceased, the amounts of soil loss and runoff were measured from each plot. Under rainfall events >100 mm, both soil loss and runoff ratio increased with increasing canopy cover subfactor (R²=0.35, p<0.01, R²=0.09, p<0.1), indicating that as vegetation cover increases, the amount of soil loss and runoff reduces. However, the soil loss and runoff were depending on the soil texture and rainfall intensity (i. e., EI30). The red pepper canopy cover subfactor was more highly correlated with soil loss in clay loam (R²=0.83, p<0.001) than in sandy loam (R²=0.48, p<0.05) and loam (R²=0.43, p<0.1) plots. However, the runoff ratio was effectively mitigated by the canopy coverage under the rainfall only with EI<SUB>30</SUB><1000 MJ mm ha<SUP>-1</SUP> hr<SUP>-1</SUP> (R²=0.34, p<0.05). Therefore, this result suggested that soil loss from the red pepper field could be reduced by adjusting seedling transplanting dates, but it was also affected by the various soil textures and EI<SUB>30</SUB>.

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UCI(KEPA) : I410-ECN-0101-2014-521-000842632