지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
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초록· 키워드
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The objective of this research was to investigate concentration and load of nutrients such as total nitrogen (TN), nitrate nitrogen (NO3-N) totalphosphorous (TP), and phosphate phosphorous (PO4-P) in a 23.4-ha paddy fields watershed with river water source. Water samples for irrigation water,drainage water, ponded water and groundwater were collected, and irrigation and drainage water were measured at 5∼10 day intervals during normal daysand at 2∼6 hours intervals during three storm events. The amount of irrigation water in the study area was over 2,000 mm, which is almost identical tothat in the area irrigated from a large reservoir but much more than that in the area irrigated from a pumping station. Mean flow-weighted concentrationsof TN and TP in irrigation water were 2.8 and 0.15 mg/L, respectively, higher than those in the area irrigated from a large reservoir or a pumping station.
The ratios of irrigation load to total inflow load for TN and TP were 88 %, and the ratios of surface outflow load to total outflow load for TN and TP wereover 90 %, indicating that total nutrient load may be greatly affected by water management. The nutrient loads per area in the study area were estimatedas TN 21.1 kg/ha and TP 1.1 kg/ha. Especially, the TP load per area in the study area was smaller than that in the area irrigated from a large reservoir ora pumping station. This may be because outflow load is not high likely due to sedimentation of particulate P and irrigation water load is high due to highTP concentration in irrigation water and high amount of irrigation water.
목차
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참고문헌 (16)
참고문헌 신청
Cassman, K. G. / 1980 / Nitrogen mineralization as affected by soil moisture, temperature and depth / Soil Science Society of America Journal 44 (6) : 1233 ~ 1237
Feng, Y. W. / 2004 / Characteristics and behavior of nutrients in a paddy field area equipped with a recycling irrigation system / Agricultural Water Management 68 (1) : 47 ~
Hama, T. / 2013 / Reducing the phosphorus effluent load from a paddy-field district through cyclic irrigation / Ecological Engineering 54 : 107 ~ 115
Kim, J. S. / 2001 / Characteristics of pollutants concentrations at paddy field areas during irrigation periods / J. of the Korean Society of Agricultural Engineers 43 (6) :
Kim, J. S. / 2006 / Nutrient runoff from a Korean rice paddy watershed during multip1e storm events in the growing season / Journal of Hydrology 327 : 128 ~ 139
Feng, Y. W. / 2004 / Characteristics and behavior of nutrients in a paddy field area equipped with a recycling irrigation system / Agricultural Water Management 68 (1) : 47 ~
Hama, T. / 2013 / Reducing the phosphorus effluent load from a paddy-field district through cyclic irrigation / Ecological Engineering 54 : 107 ~ 115
Kim, J. S. / 2001 / Characteristics of pollutants concentrations at paddy field areas during irrigation periods / J. of the Korean Society of Agricultural Engineers 43 (6) :
Kim, J. S. / 2006 / Nutrient runoff from a Korean rice paddy watershed during multip1e storm events in the growing season / Journal of Hydrology 327 : 128 ~ 139
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