Influence of water management and fertilizer application on 137Cs and 133Cs uptake in paddy rice fields

2016 ◽  
Vol 157 ◽  
pp. 102-112 ◽  
Author(s):  
Shokichi Wakabayashi ◽  
Sumio Itoh ◽  
Nobuharu Kihou ◽  
Hisaya Matsunami ◽  
Mayumi Hachinohe ◽  
...  
Keyword(s):  
Water Management ◽  
Fertilizer Application ◽  
Paddy Rice ◽  
Rice Fields ◽  
Influence Of Water

scholarly journals Minimizing Nutrient Loading from SCB Treated Paddy Rice Fields through Water Management

2012 ◽  
Vol 45 (5) ◽  
pp. 671-675 ◽  
Author(s):  
Min-Kyeong Kim ◽  
Soon-Ik Kwon ◽  
Seong-Soo Kang ◽  
Goo-Bok Jung ◽  
Seung-Chang Hong ◽  
...  
Keyword(s):  
Water Management ◽  
Nutrient Loading ◽  
Paddy Rice ◽  
Rice Fields

scholarly journals ASSESSMENT OF THE INFLUENCE OF CONTINUOUS AND INTERMITTENT IRRIGATION ON GREENHOUSE GAS EMISSIONS FROM PADDY RICE

2016 ◽  
Vol 78 (1-2) ◽  
Author(s):  
Akinbile C. O. ◽  
Semowo O. R. ◽  
Babalola T. E. ◽  
Hasfalina C. M.
Keyword(s):  
Water Management ◽  
Paddy Rice ◽  
Rice Fields ◽  
Standard Laboratory ◽  
Gas Chromatograph ◽  
Gas Sampling ◽  
Intermittent Irrigation ◽  
Laboratory Procedures ◽  
The Common ◽  
The Impact

The impact of two water management practises on Greenhouse Gases (GHGs) emissions from paddy rice fields was investigated. New Rice for Africa (NERICA 2) lowland variety was planted under intermittent irrigation (II) and continuous flooding (CF) water management practises. Two closed gas chambers (GCs) were developed and used for gas sampling from paddy fields and measurement was done conventionally in all the four growing stages of rice. Gas Chromatograph (GH200-9) was used analysing GHGs such as Methane (CH4), Nitrous oxide (N2O), Hydrogen Sulphide (H2S) and Oxygen (O2). Soil analyses were carried out to determine the presence of the following parameters viz: nitrogen (N), phosphorus (P), potassium (K), magnesium (Mg), Manganese (Mn) and calcium (Ca). Others are Organic Carbon (OC), Moisture Content (MC), Iron (Fe), Chloride (Cl) and Electrical conductivity (EC) using standard laboratory procedures and ascertain effects of their availability on GHGs concentration levels. From the study, no appreciable CH4 emissions was detected during the four growing stages and under the two water management practises but other GHGs emitted were higher in CF compared with II. Soil nutrients such as N, OC, K and P also contributed considerably to emissions recorded on the two rice fields. The detection of H2S was also an indication that other gases apart from the common GHGs were present in rice fields. Although, CH4 was not detected, other GHGs emitted were more in CF when compared with II which suggested that II be encouraged as a mitigation strategy for reducing impacts of its emissions.

Emergence of Weeds in Paddy Rice Fields

1975 ◽  
Vol 20 (3) ◽  
pp. 109-113 ◽  
Author(s):  
Mitsuyoshi SUZUKI ◽  
Takahisa SUTO
Keyword(s):  
Paddy Rice ◽  
Rice Fields

scholarly journals Cloud Cover throughout All the Paddy Rice Fields in Guangdong, China: Impacts on Sentinel 2 MSI and Landsat 8 OLI Optical Observations

2021 ◽  
Vol 13 (15) ◽  
pp. 2961
Author(s):  
Rui Jiang ◽  
Arturo Sanchez-Azofeifa ◽  
Kati Laakso ◽  
Yan Xu ◽  
Zhiyan Zhou ◽  
...  
Keyword(s):  
Cloud Cover ◽  
Southern China ◽  
Vegetation Indices ◽  
Paddy Rice ◽  
Rice Fields ◽  
Optical Observations ◽  
Landsat 8 ◽  
Monthly Basis ◽  
Satellite Sensors ◽  
Sentinel 2

Cloud cover hinders the effective use of vegetation indices from optical satellite-acquired imagery in cloudy agricultural production areas, such as Guangdong, a subtropical province in southern China which supports two-season rice production. The number of cloud-free observations for the earth-orbiting optical satellite sensors must be determined to verify how much their observations are affected by clouds. This study determines the quantified wide-ranging impact of clouds on optical satellite observations by mapping the annual total observations (ATOs), annual cloud-free observations (ACFOs), monthly cloud-free observations (MCFOs) maps, and acquisition probability (AP) of ACFOs for the Sentinel 2 (2017–2019) and Landsat 8 (2014–2019) for all the paddy rice fields in Guangdong province (APRFG), China. The ATOs of Landsat 8 showed relatively stable observations compared to the Sentinel 2, and the per-field ACFOs of Sentinel 2 and Landsat 8 were unevenly distributed. The MCFOs varied on a monthly basis, but in general, the MCFOs were greater between August and December than between January and July. Additionally, the AP of usable ACFOs with 52.1% (Landsat 8) and 47.7% (Sentinel 2) indicated that these two satellite sensors provided markedly restricted observation capability for rice in the study area. Our findings are particularly important and useful in the tropics and subtropics, and the analysis has described cloud cover frequency and pervasiveness throughout different portions of the rice growing season, providing insight into how rice monitoring activities by using Sentinel 2 and Landsat 8 imagery in Guangdong would be impacted by cloud cover.

The risks of sulfur addition on cadmium accumulation in paddy rice under different water-management conditions

2022 ◽  
Vol 118 ◽  
pp. 101-111
Author(s):  
Zhe Liu ◽  
Qi-qi Wang ◽  
Si-yu Huang ◽  
Ling-xuan Kong ◽  
Zhong Zhuang ◽  
...  
Keyword(s):  
Water Management ◽  
Cadmium Accumulation ◽  
Paddy Rice ◽  
Sulfur Addition

scholarly journals Influence of water management, photoperiod and aeration on growth, survival, and early spat settlement of the hatchery-reared green mussel, Perna viridis

2019 ◽  
Vol 11 (2) ◽  
pp. 159-172 ◽  
Author(s):  
Fedelia Flor C. Mero ◽  
Fiona. L. Pedroso ◽  
Mary Jane S. Apines-Amar ◽  
Josel F. Cadangin ◽  
Donna C. Rendaje ◽  
...  
Keyword(s):  
Water Management ◽  
Perna Viridis ◽  
Green Mussel ◽  
Influence Of Water ◽  
Spat Settlement

scholarly journals Application of a Self-Organizing Map of Isotopic and Chemical Data for the Identification of Groundwater Recharge Sources in Nasunogahara Alluvial Fan, Japan

Water ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 278 ◽  
Author(s):  
Takeo Tsuchihara ◽  
Katsushi Shirahata ◽  
Satoshi Ishida ◽  
Shuhei Yoshimoto
Keyword(s):  
Groundwater Recharge ◽  
Groundwater Resources ◽  
Paddy Rice ◽  
Alluvial Fan ◽  
Rice Fields ◽  
Isotopic Ratios ◽  
Self Organizing Map ◽  
Recharge Sources ◽  
Different Origins ◽  
Self Organizing

Paddy rice fields on an alluvial fan not only use groundwater for irrigation but also play an important role as groundwater recharge sources. In this study, we investigated the spatial distribution of isotopic and hydrochemical compositions of groundwater in the Nasunogahara alluvial fan in Japan and applied a self-organizing map (SOM) to characterize the groundwater. The SOM assisted with the hydrochemical and isotopic interpretation of the groundwater in the fan, and clearly classified the groundwater into four groups reflecting the different origins. Two groundwater groups with lower isotopic ratios of water than the mean precipitation values in the fan were influenced by the infiltration of river water flowing from higher areas in the catchments and were differentiated from each other by their Na+ and Cl− concentrations. A groundwater group with higher isotopic ratios was influenced by the infiltration of paddy irrigation water that had experienced evaporative isotopic enrichment. Groundwater in the fourth group, which was distributed in the upstream area of the fan where dairy farms dominated, showed little influence of recharge waters from paddy rice fields. The findings of this study will contribute to proper management of the groundwater resources in the fan.

Spatial variability of soil available Zn and Cu in paddy rice fields of China

2007 ◽  
Vol 55 (7) ◽  
pp. 1569-1576 ◽  
Author(s):  
Xingmei Liu ◽  
Jianming Xu ◽  
Minghua Zhang ◽  
Bingcheng Si ◽  
Keli Zhao
Keyword(s):  
Spatial Variability ◽  
Paddy Rice ◽  
Rice Fields ◽  
Zn And Cu In
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