Influence of puddling procedures on the quality of rice paddy drainage water

Somura, Hiroaki; Takeda, Ikuo; Mori, Yasushi

doi:10.1016/j.agwat.2008.12.005

Cited by 24 publications

(15 citation statements)

References 8 publications

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“…-1 ----------kg ha -1 ----- (Kang et al, 2010;Song et al, 2012;Yoon et al, 2003 (Kim et al, 2006;Lee et al, 2014;Somura et al, 2009). 이와 같이 농업에서 발생되는 오염원은 주변 하천이 나 호소에 비점오염원으로 작용할 수 있다 Kim et al, 2005a;Kim et al, 2005b;Song et al, 2013 Table 3.…”

Section: T-n T-p T-n T-p -----Kg Haunclassified

Response of Nutrient Dynamics with Topography during the Rice Cultivation in Paddy Field

Kim¹,

Choi²,

Kim³

et al. 2016

Korean Journal of Soil Science and Fertilizer

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This study aimed to evaluate the nutrient load balance from rice paddy fields with different topographies, alluvial plain and local valley. Continuous monitoring from May to September, 2013 was conducted for water quantification and qualification from alluvial plain in Yeoju region (32 ha) and local valley in Jincheon region (24 ha). The discharge rates of T-N from the alluvial plain were 57.2, 5.84, 22.7, and 5.20 kg ha -1 for irrigation, precipitation, drainage, and percolation, respectively. In case of local valley, T-N loads were 34.6, 4.73, 21.1, and 4.15 kg ha -1 for irrigation, precipitation, drainage, and percolation, respectively. In contrary, the T-P loads from the alluvial plain were 2.23, 2.22, 2.54, and 0.41 kg ha -1 for irrigation, precipitation, drainage, and percolation, respectively. In case of local valley, T-P loads were 1.44, 1.57, 1.82, and 0.34 kg ha -1 for irrigation, precipitation, drainage, and percolation, respectively. The nutrient contents in drainage water were influenced by the amount of waters, rainfall, and surface drainage water. The Pearson correlation analysis showed that rainfall was significantly correlated with nutrient loads from July to August due to the amount of runoff in local valley paddy field, and irrigation was related with nutrient loads of drainage from July to August. This study showed that paddy rice farming in alluvial plain and local valley might be beneficial to water quality protection.

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Section: T-n T-p T-n T-p -----Kg Haunclassified

Response of Nutrient Dynamics with Topography during the Rice Cultivation in Paddy Field

Kim¹,

Choi²,

Kim³

et al. 2016

Korean Journal of Soil Science and Fertilizer

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“…Soil puddling is accompanied by tillage of the paddy fields to soften the soil before rice seedlings are transplanted at the beginning of the irrigation period. Nutrient and suspended solids concentration in a paddy field is especially high during the soil puddling season (Kaneki, 2003;Somura et al, 2009). Figure 2 illustrates the components of water balance in the paddy field.…”

Section: Field Investigation Of the Paddy Fieldmentioning

confidence: 99%

Cyclic Irrigation for Reducing Nutrients and Suspended Solids Loadings from Paddy Fields in Japan

Hama¹

2012

Irrigation - Water Management, Pollution and Alternative Strategies

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“…Puddling is performed prior to transplanting as a part of field preparation, to break clods and to flatten the rice paddy for transplantation. Somura et al [32] reported that the discharge of pollutants (e.g., soil, nitrogen, and phosphorous) could significantly increase during (or shortly after) a puddling practice in Japan. APEX-Paddy was designed to simulate sediment resuspension with a puddling operation.…”

Section: Puddling Simulationmentioning

confidence: 99%

Simulating the Effects of Agricultural Management on Water Quality Dynamics in Rice Paddies for Sustainable Rice Production—Model Development and Validation

Choi

Jeong

Kim

2017

Water

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Abstract:The Agricultural Policy/Environmental eXtender (APEX) model is widely used for evaluating agricultural conservation efforts and their effects on soil and water. A key component of APEX application in Korea is simulating the water quality impacts of rice paddies because rice agriculture claims the largest cropland area in the country. In this study, a computational module called APEX-Paddy (National Academy of Agricultural Sciences, Wanju, Korea) is developed to simulate water quality with considering pertinent paddy management practices, such as puddling and flood irrigation management. Data collected at two experimental paddy sites in Korea were used to calibrate and validate the model. Results indicate that APEX-Paddy performs well in predicting runoff discharge rate and nitrogen yield while the original APEX highly overestimates runoff rates and nitrogen yields on large storm events. With APEX-Paddy, simulated and observed flow and mineral nitrogen yield (QN) are found to be highly correlated after calibration (Nash & Sutcliffe Efficiency (NSE) = 0.87 and Percent Bias (PBIAS) = −14.6% for flow; NSE = 0.68 and PBIAS = 2.1% for QN). Consequently, the APEX-Paddy showed a greater accuracy in flow and QN prediction than the original APEX modeling practice using the SCS-CN (Soil Conservation Service-Curve Number) method.

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Influence of puddling procedures on the quality of rice paddy drainage water

Cited by 24 publications

References 8 publications

Response of Nutrient Dynamics with Topography during the Rice Cultivation in Paddy Field

Response of Nutrient Dynamics with Topography during the Rice Cultivation in Paddy Field

Cyclic Irrigation for Reducing Nutrients and Suspended Solids Loadings from Paddy Fields in Japan

Simulating the Effects of Agricultural Management on Water Quality Dynamics in Rice Paddies for Sustainable Rice Production—Model Development and Validation

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