scholarly journals Magnetic Difference Between Deep and Surface Soil Within an Agricultural Area in Southern China: Implications for Magnetic Mineral Transformation During Pedogenic Process Under Subtropical Climate

2020 ◽  
Vol 7 (10) ◽  
Author(s):  
Tingping Ouyang ◽  
Mingkun Li ◽  
Yu Guo ◽  
Shasha Peng ◽  
Chenjian He ◽  
...  
Keyword(s):  
Surface Soil ◽  
Southern China ◽  
Agricultural Area ◽  
Magnetic Mineral ◽  
Subtropical Climate ◽  
Mineral Transformation ◽  
Pedogenic Process

Potential effects of exploiting the Yunfu pyrite mine (southern China) on soil: evidence from analyzing trace elements in surface soil

2019 ◽  
Vol 191 (6) ◽  
Author(s):  
Zhi-hua Tang ◽  
Ting-ping Ouyang ◽  
Ming-kun Li ◽  
Ning-sheng Huang ◽  
Yao-qiu Kuang ◽  
...  
Keyword(s):  
Trace Elements ◽  
Surface Soil ◽  
Southern China ◽  
Soil Evidence

scholarly journals Air Quality and Key Variables in High-Density Housing

2021 ◽  
Vol 13 (8) ◽  
pp. 4281
Author(s):  
Beisi Jia ◽  
Sibei Liu ◽  
Michelle Ng
Keyword(s):  
Air Quality ◽  
Urban Form ◽  
Southern China ◽  
Air Flow ◽  
High Density ◽  
Housing Development ◽  
Subtropical Climate ◽  
Key Variables ◽  
Housing Estates ◽  
High Density Housing

The high-rise and high-density housing development in nearby industry relocations is a general urban sprawl phenomenon in fast-growing cities in Southern China. Aside from the low price, the improved air quality in the suburban area is always a reason for home buyers, but the consistent monitoring of air quality and knowledge about how to plan housing estates are lacking. This paper investigates the relationship between the housing morphology and the air quality in three housing estates in Shenzhen. This research utilizes on-site monitoring equipment to examine negative air ions (NAIs) and fine particulate matter (PM2.5) and the Computational Fluid Dynamics (CFD) simulation to examine the air flow. This study reveals the effect of the urban form on the concentration of NAIs and PM2.5 in spatial variation. A correlation study between the configuration variables of the urban form and the CFD air flow pattern helps to identify the key variables influencing the air quality. This study concludes that in housing estates with good air quality of surroundings, the building density has no remarkable effect. However, the footprint of buildings, the layout of podiums, the roughness length of the building, the distance between buildings, the open space aspect ratio and the mean building height may have a remarkable impact on the air flow and quality. These findings may encourage high-density housing development and provide planning guidance for the configuration of housing forms in Southern China and subtropical climate regions around the world.

scholarly journals Assessment of Water Cloud Model based on SAR and optical satellite data for surface soil moisture retrievals over agricultural area

2021 ◽  
Vol 10 (3) ◽  
pp. 243-250
Author(s):  
Rida KHELLOUK ◽  
Ahmed BARAKAT ◽  
Aafaf EL JAZOULİ ◽  
Hayat LİONBOUİ ◽  
Tarik BENABDELOUAHAB
Keyword(s):  
Soil Moisture ◽  
Satellite Data ◽  
Surface Soil ◽  
Cloud Model ◽  
Agricultural Area ◽  
Surface Soil Moisture ◽  
Model Based ◽  
Water Cloud ◽  
Optical Satellite Data

Early Cretaceous vertebrates from the Xinlong Formation of Guangxi (southern China): a review

2015 ◽  
Vol 153 (1) ◽  
pp. 143-159 ◽  
Author(s):  
JINYOU MO ◽  
ERIC BUFFETAUT ◽  
HAIYAN TONG ◽  
ROMAIN AMIOT ◽  
LIONEL CAVIN ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Southern China ◽  
Northern China ◽  
Subtropical Climate ◽  
The South ◽  
Jehol Biota ◽  
Oxygen And Carbon Isotope ◽  
Se Asia ◽  
North Eastern ◽  
Vertebrate Assemblage

AbstractThe vertebrate assemblage from the Early Cretaceous non-marine Xinlong Formation of the Napai Basin, in the south-western part of Guangxi Zhuang Autonomous Region (southern China), is reviewed. The assemblage includes chondrichthyans (at least six species of hybodont sharks includingHybodus, Thaiodus, HeteroptychodusandAcrorhizodus), actinopterygians (Halecomorphi and Ginglymodi), turtles (the adocidShachemysand the carettochelyidKizylkumemys), crocodilians (cf.Theriosuchus) and dinosaurs (the sauropodsFusuisaurusandLiubangosaurus, carcharodontosaurid and spinosaurid theropods, iguanodontians and a possible psittacosaurid). This assemblage shows many similarities to those from non-marine formations of the Khorat Group of north-eastern Thailand. It seems to be particularly close to that from the Khok Kruat Formation, considered as Aptian in age, as shown especially by sharks and turtles and by the presence of iguanodontians. An Aptian age is therefore proposed for the Xinlong Formation. A study of the stable oxygen and carbon isotope compositions of reptile apatite suggests that this part of South China experienced subtropical arid conditions during the deposition of the Xinlong Formation. In its composition, the vertebrate fauna from the Xinlong Formation seems to be more similar to coeval faunas from SE Asia than to assemblages from northern China (including the Jehol Biota). Although this may partly reflect different depositional and taphonomic environments (fluvial for the Xinlong Formation versus lacustrine for the Jehol Biota) it seems likely that, during Early Cretaceous time, southern China and SE Asia were part of a distinct zoogeographical province, different from that corresponding to northern China. This may be the result of both climatic differences (with relatively cool climates in northern China versus a subtropical climate in the south) and geographical barriers such as mountain chains.

Analysis of the Factors Affecting Boar culling in commercial Boar Studs in Southern China

2017 ◽  
Author(s):  
Zhili Li ◽  
Yunxiang K. Zhao ◽  
Jiedan Liao ◽  
Shujian Huang
Keyword(s):  
Decision Making ◽  
Southern China ◽  
Descriptive Statistics ◽  
Reproductive Efficiency ◽  
Subtropical Climate ◽  
Genital System ◽  
Reproductive Disorders ◽  
Factors Affecting ◽  
Breed Differences ◽  
Decision Making Processes

The objectives of this study were to measure culling frequency and analysis of reasons for boar culling in commercial boar studs. Data were obtained from nine commercial boar studs included 2342 culled boars in Southern China during July 2013 to June 2016. Descriptive statistics of reasons for boar culling revealed that the frequency of unplanned cull boar accounted for a large proportion (88.04%), reproductive disorders (40.61%) and lameness (27.2%) were the most frequently cited reasons. Sperm-related problems accounted for the largest proportion (668, 70.24%) due to reproductive disorders, followed by the abnormal genital system (169, 17.78%). The highest frequency of reproductive disorders was arisen in May (17.98%), and the relatively high culling frequency lasted for 16 weeks until August (10.00%), especially for the Yorkshire boar that owned highest culling risk (47.09%) with the culled number reached peak in May (60, 21.82%), followed by July (33, 12.00%). In additionÿthe highest frequency of boar culling due to lameness appeared in May (90, 14.13%), followed by January (68, 10.68%) and December (66, 10.36%) with cold and wet. It was speculated that extreme weather was more likely to cause lameness. Our research suggested farmers under subtropical climate should take effective measures to reduce heat and humidity stress at the earliest, preferably from late spring to August to improve reproductive efficiency on boar studs, and also take breed differences into their decision-making processes to ensure adequate boar power and customer satisfaction.

Biochar applied to consolidated land increased the quality of an acid surface soil and tobacco crop in Southern China

2019 ◽  
Vol 20 (8) ◽  
pp. 3091-3102 ◽  
Author(s):  
Jiuquan Zhang ◽  
Yilan Huang ◽  
Jianqi Lin ◽  
Xue Chen ◽  
Caibin Li ◽  
...  
Keyword(s):  
Surface Soil ◽  
Southern China

Early rhinocerotids (Mammalia: Perissodactyla) from South Asia and a review of the Holarctic Paleogene rhinocerotid record

2003 ◽  
Vol 40 (3) ◽  
pp. 365-374 ◽  
Author(s):  
Pierre-Olivier Antoine ◽  
Stéphane Ducrocq ◽  
Laurent Marivaux ◽  
Yaowalak Chaimanee ◽  
Jean-Yves Crochet ◽  
...  
Keyword(s):  
South Asia ◽  
Southern China ◽  
Indian Subcontinent ◽  
Late Eocene ◽  
Middle Part ◽  
Tibet Plateau ◽  
Subtropical Climate ◽  
Large Mammals ◽  
Early Oligocene ◽  
Faunal Similarity

The earliest rhinocerotids from South Asia are identified on the basis of few dental remains originating from the Late Eocene of Thailand (Wai Lek mine, Krabi Basin) and the Early Oligocene of Pakistan (Paali nala C2, Bugti Hills). Once synthesized, the Holarctic Paleogene rhinocerotid record points out a westward diachronism of rhinocerotid First Appearance Data, from North America to Europe via Asia, throughout mid-Cenozoic times. The faunal similarity among mammal localities from the Late Eocene and Early Oligocene of peninsular Thailand, southern China, and Pakistan suggests the existence of a single South Asian paleoprovince during this interval and the persistence of a tropical–subtropical climate. Substantial faunal changes recorded in eastern Balochistan reveal a significant climatic deterioration from the middle part of the Oligocene. Neither provinciality nor endemism is noticeable for rhinocerotoid taxa recognized in the Oligocene of the Indian subcontinent: neither the Himalayas nor the Tibet Plateau was a paleogeographic barrier for large mammals during this interval.

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