Field Simulation the Effects of Global Warming on the Freeze-Thaw Process of the Freshwater Marsh in the Sanjiang Plain, Northeast China

2008 ◽  
Author(s):  
Xiao-Fei Yu ◽  
Guo-Ping Wang
Keyword(s):  
Global Warming ◽  
Northeast China ◽  
Sanjiang Plain ◽  
Freshwater Marsh ◽  
The Sanjiang Plain ◽  
Freeze Thaw ◽  
Field Simulation

Contribution to the Global Warming Mitigation of Marshlands Conversion to Croplands in the Sanjiang Plain, Northeast China

2012 ◽  
Vol 41 (4) ◽  
pp. 319-324 ◽  
Author(s):  
Xiao-Hui Liu ◽  
Gui-Hua Dong ◽  
Yuan Zhang ◽  
Xian-Guo Lu ◽  
Ming Jiang
Keyword(s):  
Global Warming ◽  
Northeast China ◽  
Sanjiang Plain ◽  
The Sanjiang Plain

scholarly journals Simulating Land-Use Changes and Predicting Maize Potential Yields in Northeast China for 2050

2021 ◽  
Vol 18 (3) ◽  
pp. 938
Author(s):  
Luoman Pu ◽  
Jiuchun Yang ◽  
Lingxue Yu ◽  
Changsheng Xiong ◽  
Fengqin Yan ◽  
...  
Keyword(s):  
Land Use ◽  
Food Security ◽  
Northeast China ◽  
Land Use Changes ◽  
Sanjiang Plain ◽  
Potential Production ◽  
Potential Yield ◽  
The Sanjiang Plain ◽  
Ecological Zones ◽  
The Future

Crop potential yields in cropland are the essential reflection of the utilization of cropland resources. The changes of the quantity, quality, and spatial distribution of cropland will directly affect the crop potential yields, so it is very crucial to simulate future cropland distribution and predict crop potential yields to ensure the future food security. In the present study, the Cellular Automata (CA)-Markov model was employed to simulate land-use changes in Northeast China during 2015–2050. Then, the Global Agro-ecological Zones (GAEZ) model was used to predict maize potential yields in Northeast China in 2050, and the spatio-temporal changes of maize potential yields during 2015–2050 were explored. The results were the following. (1) The woodland and grassland decreased by 5.13 million ha and 1.74 million ha respectively in Northeast China from 2015 to 2050, which were mainly converted into unused land. Most of the dryland was converted to paddy field and built-up land. (2) In 2050, the total maize potential production and average potential yield in Northeast China were 218.09 million tonnes and 6880.59 kg/ha. Thirteen prefecture-level cities had maize potential production of more than 7 million tonnes, and 11 cities had maize potential yields of more than 8000 kg/ha. (3) During 2015–2050, the total maize potential production and average yield decreased by around 23 million tonnes and 700 kg/ha in Northeast China, respectively. (4) The maize potential production increased in 15 cities located in the plain areas over the 35 years. The potential yields increased in only nine cities, which were mainly located in the Sanjiang Plain and the southeastern regions. The results highlight the importance of coping with the future land-use changes actively, maintaining the balance of farmland occupation and compensation, improving the cropland quality, and ensuring food security in Northeast China.

Ecosystem-atmosphere exchange of CO2 in a temperate herbaceous peatland in the Sanjiang Plain of northeast China

2015 ◽  
Vol 75 ◽  
pp. 16-23 ◽  
Author(s):  
Xiaoyan Zhu ◽  
Changchun Song ◽  
Christopher Martin Swarzenski ◽  
Yuedong Guo ◽  
Xinhou Zhang ◽  
...  
Keyword(s):  
Northeast China ◽  
Sanjiang Plain ◽  
The Sanjiang Plain

scholarly journals Effects of Carbon Addition on Dissimilatory Fe(III) Reduction in Freshwater Marsh and Meadow Wetlands

2018 ◽  
Vol 10 (11) ◽  
pp. 4309 ◽  
Author(s):  
Xiaoyan Zhu ◽  
Yuxiang Yuan ◽  
Ming Jiang
Keyword(s):  
Iron Reduction ◽  
Reduction Rate ◽  
Negative Relationship ◽  
Sanjiang Plain ◽  
Freshwater Marsh ◽  
Freshwater Wetlands ◽  
Natural Environments ◽  
Carbon Addition ◽  
Soil Slurry ◽  
The Sanjiang Plain

The progress of dissimilatory iron(III) reduction is widespread in natural environments, particularly in anoxic habitats; in fact, wetland ecosystems are considered as “hotspots” of dissimilatory Fe(III) reduction. In this study, we conducted soil slurry and microbial inoculation anaerobic incubation with glucose, pyruvate, and soluble quinone anthraquinone-2,6-disulphonate (AQDS) additions in freshwater marsh and meadow wetlands in the Sanjiang Plain, to evaluate the role of carbon addition in the rates and dynamics of iron reduction. Dissimilatory Fe(III) reduction in marsh wetlands responded more quickly and showed twice the potential for Fe(III) reduction as that in meadow wetland. Fe(III) reduction rate in marsh and meadow wetlands was 76% and 30%, respectively. Glucose had a higher capacity to enhance Fe(III) reduction than pyruvate, which provides valuable information for the further isolation of Fe reduction bacteria in pure culture. AQDS could dramatically increase potential Fe(III) reduction as an electron shuttle in both wetlands. pH exhibited a negative relationship with Fe(III) reduction. In view of the significance of freshwater wetlands in the global carbon and iron cycle, further profound research is now essential and should explore the enzymatic mechanisms underlying iron reduction in freshwater wetlands.

scholarly journals Mapping paddy rice distribution using multi-temporal Landsat imagery in the Sanjiang Plain, northeast China

2015 ◽  
Vol 10 (1) ◽  
pp. 49-62 ◽  
Author(s):  
Cui Jin ◽  
Xiangming Xiao ◽  
Jinwei Dong ◽  
Yuanwei Qin ◽  
Zongming Wang
Keyword(s):  
Northeast China ◽  
Landsat Imagery ◽  
Sanjiang Plain ◽  
Paddy Rice ◽  
The Sanjiang Plain ◽  
Rice Distribution ◽  
Multi Temporal
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