• 한국환경복원기술학회지
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• 제2권2호
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• pp.43-52
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• 1999

This study was carried out to verify results of the nursery seedbeds. From November of 1997 to September of 1998, the artificial banking slopes in the greenhouse of the College of Agriculture and Life Sciences, Seoul National University were seeded with the mixtures of those species. Most of exotic species showed relatively poor development of root as short as 30cm. Also the green weight of root biomass of the native species was more than two times than that of the exotic species. On the other hand, it was found that the exotic species have relatively well-developed fine roots. Thus, it was concluded that the seed-mixture of the native species with long and thick roots and the exotic species with fine roots be the most effective method for topsoil erosion control on banking-slopes. The artificial rainfall system treatment(30mm/hr, 60mm/hr, 100mm/hr) on $30^{\circ}$ banking-slopes did not cause any significant change in the amount of soil loss by erosion. The root system was best developed in the plot of 1,000 seedlings per square meter and it performed well for soil erosion control. Consequently, in the case of seeding of single herbaceous species without mixing any woody seeds, the expected seedlings were 1,000 to 2,000 per square meter.

• 한국농공학회논문집
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• 제59권2호
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• pp.91-99
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• 2017

The objective of this research was to investigate runoff characteristics of suspended solid (SS) and chemical oxygen demand (COD) from a paddy field watershed during storm events in the growing and non-growing seasons. Average of event mean concentration (EMC) of pollutants were 56.9 mg/L for SS and 23.9 mg/L for COD in the non-growing season and 50.3 mg/L for SS and 11.9 mg/L for COD in the growing season. The average EMC of SS in the study area was much lower than that in the uplands irrespective of cultivation, suggesting that paddy fields control soil erosion. This may be because flooding and wet soil in the growing season, and rice straw residue and stubble on the topsoil in the non-growing season reduce soil erosion. The changing tillage practice from fall tillage to spring tillage avoids soil erosion due to shortening of the tilled fallow period. However, the average EMC of COD in the non-growing season was about twice as much that in the growing season likely due to the runoff of organics like rice straw residues. The relationship between SS and COD loads and stormwater runoff volume was expressed by power function. The exponent for SS was higher than that for COD, suggesting that SS load increased with stormflow runoff more than COD load did. The mean SS and COD loads per storm during the non-growing season were much lower than those in the growing season, and therefore non-point source pollution in the growing season should be managed well.

• 한국토양비료학회지
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• 제45권5호
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• pp.725-732
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• 2012

고랭지의 밭은 대부분 산지를 개간하여 조성한 경사 밭으로 작물이 재배되는 여름철 집중강우에 의해 많은 양의 토양이 유실된다. 특히 이 지역의 콩 재배에서는 경사 밭 전면경운에 의한 토양 교란과 생육초기 노출된 표토 때문에 토양유실 위험이 가중되고 있다. 본 연구는 고랭지의 콩 재배에서 토양유실 경감을 위한 피복방법을 개발하기 위해 수행하였다. 토양피복 방법으로 호밀 예취피복, 호밀 초생피복, 흑색비닐멀칭 등 8처리를 두었으며, 경사 17%내외 무저라이시메타에서 유거수 및 토양유출 특성과 콩 생육특성을 평가하였다. 시험결과 호밀예취피복을 포함한 토양피복처리는 유거수 유출량이 ha당 $177{\sim}2,375m^3$로 관행 $5,274m^3$의 3.4~45% 수준으로 감소하였다. 토양유실량 또한 관행 처리구가 ha당 40.72톤인 반면, 호밀예취피복을 포함한 피복처리구는 0.02~1.94톤으로 관행 대비 95%이상의 경감 효과가 있었다. 콩 수확기 수량 구성요소인 종실중은 관행의 경우 ha당 2.0톤 수준을 보였는데, 호밀 초생피복은 0.3톤, 곰취 초생 피복 1.3톤, 고사리 초생피복 1.4톤, 벌개미취 초생피복은 0.7톤, 레드클로버 초생피복은 0.2톤 수준으로 낮은 경향을 보였다. 반면, 호밀 예취피복은 3.8톤, 흑색비닐멀칭은 3.1톤으로 관행보다 증수되었다. 결과적으로 호밀 예취피복은 콩 수량에는 영향을 미치지 않으면서 토양유실 경감효과가 매우 높아 콩재배 경사밭 토양보전기술로 유용하게 적용 되리라 판단된다.