Nutrients Runoff and Rice Growth by Soil Texture and Transplanting Time during Early Maturing Rice Cultivating

다국어 초록 (Multilingual Abstract)

The early maturing rice is a species that can be cultivated at various times, such as early, normal season, andlate cultivation, depending on the purpose. There are many studies on the characteristics of rice according tothe transplanting time for these early maturing rice, but studies on the runoff of nutrients are insignificant. Thesurface runoff of NH4+-N was the highest among the treatment at 1.337 g m-2 (2020 year) in the Clay Loam(CL) & late cultivation, and the smallest treatment was the Sandy Loam (SL) & normal season cultivation(0.005 g m-2, 2019 year). The highest NO3--N surface runoff was 0.137 g m-2 (2020 year) in the CL & latecultivation. In the case of phosphate, there were more nutrients runoff from late cultivation with large outflowsthan normal season cultivation. The underground runoff of NH4+-N was the highest among the treatment at0.147 g m-2 (2020 year) in the SL & late cultivation, and the smallest treatment was the CL & normal seasoncultivation (0.007 g m-2, 2019 year). The highest NO3--N underground runoff was 2.113 g m-2 (2019 year) inthe SL & normal season cultivation. In order to compare rice growth, the dry weight of leaves, shoots, and earsafter rice harvest was compared. ear was a little larger in the normal season cultivation than in the latecultivation in 2019 (p < 0.05), but there was no difference in ear according to soil texture and the transplantingtime in 2020. There may be differences in nutrient outflow and rice growth depending on the soil texture andtransplanting time when cultivating early maturing rice, and the results of this study can be used as basic dataon nutrient outflow in paddy when cultivating early maturing rice.

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