scholarly journals Herbicide discharge from rice paddy fields by surface runoff and percolation flow: A case study in paddy fields in the Lake Biwa basin, Japan

2018 ◽  
Vol 43 (1) ◽  
pp. 24-32 ◽  
Author(s):  
Miki Sudo ◽  
Yuko Goto ◽  
Kenji Iwama ◽  
Yoshifumi Hida
Keyword(s):  
Surface Runoff ◽  
Lake Biwa ◽  
Rice Paddy ◽  
Paddy Fields ◽  
Rice Paddy Fields

Importance of subsurface fluxes of water, nitrogen and phosphorus from rice paddy fields relative to surface runoff

2019 ◽  
Vol 213 ◽  
pp. 627-635 ◽  
Author(s):  
Jin Fu ◽  
Yali Wu ◽  
Qihui Wang ◽  
Kelin Hu ◽  
Shiqin Wang ◽  
...  
Keyword(s):  
Surface Runoff ◽  
Rice Paddy ◽  
Paddy Fields ◽  
Nitrogen And Phosphorus ◽  
Rice Paddy Fields

A study on pollutant loads from the forest and rice paddy fields

1996 ◽  
Vol 33 (4-5) ◽  
pp. 159-165 ◽  
Author(s):  
Osami Kawara ◽  
Katsuya Hirayma ◽  
Takao Kunimatsu
Keyword(s):  
Water Quality ◽  
Lake Biwa ◽  
Rice Paddy ◽  
River Basins ◽  
Point Sources ◽  
Paddy Fields ◽  
Pollutant Loads ◽  
Rice Paddy Fields ◽  
Load Generation

The eutrophication of Lake Biwa, which is the largest lake in Japan and one of the most important fresh water resources, has been warned since 1960s. In order to improve the water quality of the lake, it is inevitable to reduce the pollutant loads from the river basins. The Hino river and the Soma river basins are considered in the present study and models which predict the influence of pollutant load generation on the discharged pollutant loads through the rivers. These basins mainly consist of forests and rice paddy fields. The identified models reproduce the observed water quality relatively well. Evaluation of loads from point-sources and non-point sources indicates that the loads from non-point sources occupy the most of pollutant loads from the basins. Especially, the loads from rice paddy fields occupy most of the pollutant loads from the basisn. Therefore, controlling non-point source pollutant loads in the Hino and Soma river basins is an important step in checking the eutrophication of Lake Biwa.

Evaluation of methane and nitrous oxide emissions in a three-year case study on single rice and ratoon rice paddy fields

2021 ◽  
Vol 297 ◽  
pp. 126650
Author(s):  
Kaifu Song ◽  
Guangbin Zhang ◽  
Haiyang Yu ◽  
Qiong Huang ◽  
Xiaoli Zhu ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Rice Paddy ◽  
Paddy Fields ◽  
Nitrous Oxide Emissions ◽  
Single Rice ◽  
Rice Paddy Fields

scholarly journals Dry matter accumulation and plant type of the high yielding soybean grown under converted rice paddy fields.

1984 ◽  
Vol 53 (4) ◽  
pp. 510-518 ◽  
Author(s):  
Kimio NAKASEKO ◽  
Humio NOMURA ◽  
Kanji GOTOH ◽  
Takeshi OHNUMA ◽  
Yoshikatsu ABE ◽  
...  
Keyword(s):  
Dry Matter ◽  
Rice Paddy ◽  
Paddy Fields ◽  
Dry Matter Accumulation ◽  
Plant Type ◽  
Rice Paddy Fields
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