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경사밭 고랑 식생 및 PAM (Polyacrylamide) 멀칭에 따른 영농기 비점오염 저감효과 분석

Reduction Efficiency Analysis of Furrow Vegetation and PAM (Polyacrylamide) Mulching for Non-Point Source Pollution Load from Sloped Upland During Farming Season

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주제분류농학

초록

As a result of climate change, non-point source pollution (NPS) from farmland with the steep slope during the rainy season is expected to have asignificant impact on the water system. This study aimed to evaluate the effect of furrow mulching using alfalfa and PAM (Polyacrylamide) materialsfor each rainfall event, while considering the load characteristics of NPS. The study was conducted in Wanju-gun, Jeollabuk-do, in 2022, with a testbedthat had a slope of 13%, sandy loam soil, and maize crops. The testbed was composed of four plots: bare soil (Bare), No mulching (Cont.), Vegetationmulching (VM), and PAM mulching (PM). Runoff was collected from each rainfall event using a 1/40 sampler and the NPS load was calculated bymeasuring the concentrations of SS, T-N, T-P, and TOC. During farming season, the reduction efficiency of NPS load was 37.1∼59.5% for VM and38.2∼75.7% for PM. The analysis found that VM had a linear regression correlation (R2=0.28∼0.86, P-value=0.01∼0.1) with elapsed time ofapplication, while PM had a quadratic regression correlation (R2=0.35∼0.80, P-value=0.1). These results suggest that the selection of furrow mulchmaterials and the appropriate application method play a crucial role in reducing non-point pollution in farmland. Therefore, further studies on thetime-series reduction effect based on the application method are recommended to develop more effective preemptive reduction technologies.

Abstract

As a result of climate change, non-point source pollution (NPS) from farmland with the steep slope during the rainy season is expected to have asignificant impact on the water system. This study aimed to evaluate the effect of furrow mulching using alfalfa and PAM (Polyacrylamide) materialsfor each rainfall event, while considering the load characteristics of NPS. The study was conducted in Wanju-gun, Jeollabuk-do, in 2022, with a testbedthat had a slope of 13%, sandy loam soil, and maize crops. The testbed was composed of four plots: bare soil (Bare), No mulching (Cont.), Vegetationmulching (VM), and PAM mulching (PM). Runoff was collected from each rainfall event using a 1/40 sampler and the NPS load was calculated bymeasuring the concentrations of SS, T-N, T-P, and TOC. During farming season, the reduction efficiency of NPS load was 37.1∼59.5% for VM and38.2∼75.7% for PM. The analysis found that VM had a linear regression correlation (R2=0.28∼0.86, P-value=0.01∼0.1) with elapsed time ofapplication, while PM had a quadratic regression correlation (R2=0.35∼0.80, P-value=0.1). These results suggest that the selection of furrow mulchmaterials and the appropriate application method play a crucial role in reducing non-point pollution in farmland. Therefore, further studies on thetime-series reduction effect based on the application method are recommended to develop more effective preemptive reduction technologies.

참고문헌 (33)

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