Influences of Seasonal Freezing and Thawing on Soil Water-stable Aggregates in Orchard in High Cold Region, Northeast China

2021 ◽  
Vol 31 (2) ◽  
pp. 234-247
Author(s):  
Yunjiang Liang ◽  
Xu Deng ◽  
Tao Song ◽  
Guoshuang Chen ◽  
Yuemei Wang ◽  
...  
Keyword(s):  
Soil Water ◽  
Northeast China ◽  
Cold Region ◽  
Freezing And Thawing ◽  
Seasonal Freezing ◽  
Water Stable Aggregates

scholarly journals Phosphorus distribution and availability within soil water-stable aggregates as affected by long-term fertilisation

2020 ◽  
Vol 66 (No. 11) ◽  
pp. 552-558
Author(s):  
Xiuzhi Zhang ◽  
Ping Zhu ◽  
Chang Peng ◽  
Hongjun Gao ◽  
Qiang Li ◽  
...  
Keyword(s):  
Soil Water ◽  
Northeast China ◽  
Phosphorus Content ◽  
Soil Phosphorus ◽  
Pig Manure ◽  
Size Classes ◽  
Water Stable Aggregates ◽  
Positive Correlations ◽  
Vital Factor

A field experiment lasting 37 years was conducted to evaluate the applications of different rates of pig manure and mineral fertilisers alone or in combination impacts on total phosphorus (P<sub>total</sub>) and Olsen phosphorus (P<sub>Olsen</sub>) contents and phosphorus activity coefficient (PAC, percentage of P<sub>Olsen</sub> to P<sub>total</sub>) within soil water-stable aggregates (WSA) in a Mollisol of Northeast China. The contents of P<sub>total</sub> and P<sub>Olsen</sub> associated with different size classes of WSA significantly (P &lt; 0.05) increased with an increasing rate of applied P. The application of manure alone or combined with mineral fertilisers significantly increased PAC value associated with different size classes of WSA. There were positive correlations between P<sub>total</sub> and P<sub>Olsen</sub> contents with soil organic carbon (SOC) content within soil WSA. As SOC content increased 1 g/kg, P<sub>total</sub> and P<sub>Olsen</sub> contents increased 0.06–0.10 g/kg and 7.69–22.2 mg/kg, respectively, and the increase was larger in smaller size classes of WSA. The results suggested that a high manure rate combined with mineral fertilisers is more beneficial for increasing soil phosphorus content and availability. SOC is a vital factor controlling phosphorus content and availability within soil WSA.  

Geothermal distribution characteristics and sedimentary basin geothermal system in the severe cold region of Northeast China

2020 ◽  
Vol 17 (3) ◽  
pp. 321-337
Author(s):  
Zhen-Yu Fan ◽  
Sheng-Qing Xiong ◽  
Chang-Chun Yu ◽  
Gui-Bin Zhang ◽  
Xin-Yong Zhang ◽  
...  
Keyword(s):  
Northeast China ◽  
Sedimentary Basin ◽  
Geothermal System ◽  
Distribution Characteristics ◽  
Cold Region

scholarly journals A Dual‐Permeability Approach for Modeling Soil Water Flow and Heat Transport during Freezing and Thawing

2019 ◽  
Vol 18 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Mats Larsbo ◽  
Roger Holten ◽  
Marianne Stenrød ◽  
Ole Martin Eklo ◽  
Nicholas Jarvis
Keyword(s):  
Soil Water ◽  
Heat Transport ◽  
Water Flow ◽  
Freezing And Thawing ◽  
Soil Water Flow

Field measurement of air temperature in a cold region tunnel in northeast China

2020 ◽  
Vol 171 ◽  
pp. 102957 ◽  
Author(s):  
Pengyu Zhao ◽  
Jianxun Chen ◽  
Yanbin Luo ◽  
Yao Li ◽  
Lijun Chen ◽  
...  
Keyword(s):  
Air Temperature ◽  
Field Measurement ◽  
Northeast China ◽  
Cold Region

Silica-Scaled Chrysophytes of Cold Region: A Case Study Zhenbao Island Wetland Preserve, Northeast China

2012 ◽  
Vol 178-181 ◽  
pp. 922-925
Author(s):  
Cheng Xue Ma ◽  
Jing Zhang ◽  
Hong Xian Yu ◽  
Yin Xin Wei ◽  
Xiu Ping Yuan
Keyword(s):  
Northeast China ◽  
New Records ◽  
Wide Distribution ◽  
Distribution Range ◽  
Dispersal Ability ◽  
Cold Region ◽  
Scaled Chrysophytes ◽  
First Report

This first survey in 2009 and 2010 on silica-scaled Chrysophytes in Zhenbao Island Wetland Preserve, Northeast China, recorded 32 taxa (5 in Chrysophyceae and 27 in Synurophyceae), of which 29 were previously found in other parts of China, three species, Spiniferomonas serrata, Mallomonas transsylvanica and Synura punctulosa are new records to China. In terms of biogeography, 1 taxon is endemic, 2 bipolar, 1 northern temperate, 9 cosmopolitan, and 18 of wide distribution. The endemism of Synura punctulosa, appears due to its poor dispersal ability; lack of sampling data may also contribute its known distribution range. Spiniferomonas serrata and Mallomonas transsylvanica, two bipolar taxa, are the first report in China. More research efforts are needed for adequately understanding the distributions of this group of algae.

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