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

Tae-Gu Lee; Myung-Sook Kim; Sang-Ho Jeon; Ha-il Jung; Jung-Hun Ok

doi:10.7745/KJSSF.2022.55.1.038

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2022 Vol.55, Issue 1 Preview Page Next Page

Original research article

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

28 February 2022. pp. 38-47

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Abstract

The early maturing rice is a species that can be cultivated at various times, such as early, normal season, and late cultivation, depending on the purpose. There are many studies on the characteristics of rice according to the transplanting time for these early maturing rice, but studies on the runoff of nutrients are insignificant. The surface 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 & late cultivation. In the case of phosphate, there were more nutrients runoff from late cultivation with large outflows than normal season cultivation. The underground runoff of NH₄⁺-N was the highest among the treatment at 0.147 g m^-2 (2020 year) in the SL & late cultivation, and the smallest treatment was the CL & normal season cultivation (0.007 g m^-2, 2019 year). The highest NO₃^--N underground runoff was 2.113 g m^-2 (2019 year) in the SL & normal season cultivation. In order to compare rice growth, the dry weight of leaves, shoots, and ears after rice harvest was compared. ear was a little larger in the normal season cultivation than in the late cultivation in 2019 (p < 0.05), but there was no difference in ear according to soil texture and the transplanting time in 2020. There may be differences in nutrient outflow and rice growth depending on the soil texture and transplanting time when cultivating early maturing rice, and the results of this study can be used as basic data on nutrient outflow in paddy when cultivating early maturing rice.

The amount of nutrients losses due to underground runoff during cultivation.

Year	Transplanting time	Soil texture	Water runoff (mm)	Nutrient runoff (g m^-2)
Year	Transplanting time	Soil texture	Water runoff (mm)	NH₄⁺-N	NO₃^--N	PO₄^3-
2019	Normal	CL^†	91.5	0.007	0.094	0.003
	Normal	SL	365.4	0.027	2.113	0.005
	Late	CL	56.7	0.011	0.035	0.003
	Late	SL	431.2	0.034	1.301	0.025
2020	Normal	CL	329.7	0.012	0.106	0.002
	Normal	SL	337.1	0.080	0.558	0.016
	Late	CL	27.5	0.019	0.020	0.001
	Late	SL	356.3	0.147	0.218	0.012

^†CL, clay loam; SL, sandy loam.

Keywords

Early maturing rice

Lysimeter

Nutrient runoff

Paddy

Soil texture

Transplanting time

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Information

Publisher :Korean Society of Soil Science and Fertilizer
Publisher(Ko) :한국토양비료학회
Journal Title :Korean Journal of Soil Science and Fertilizer
Journal Title(Ko) :한국토양비료학회 학회지
Volume : 55
No :1
Pages :38-47
Received Date : 2021-11-08
Revised Date : 2021-11-30
Accepted Date : 2021-12-01
DOI :https://doi.org/10.7745/KJSSF.2022.55.1.038

Korean Journal of Soil Science and Fertilizer ISSN:0367-6315(Print) 2288-2162(Online) 한국토양비료학회 학회지

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