Carbon, nitrogen and phosphorus stoichiometry in Pinus tabulaeformis forest ecosystems in warm temperate Shanxi Province, north China

The red turpentine beetle, Dendroctonus valens LeConte (Coleoptera: Scolytidae), was found for the first time in China in Yangcheng and Xinshui counties, Shanxi province in 1998, and in Hebei province in 1999. The beetle mostly attacks the oil pine Pinus tabulaeformis Carriére. By 2003 the beetle was found in 85 counties of three provinces in north China and the area of infested pine forests covered more than 700,000 ha. The elevation above sea level of forests infested is more than 800 m. The beetles most frequently attack trees on hilltops and at the forest edge, fewer attacks occur in the centre of the stand. This correlates with the damage done to the trees by wind or man. Weak and dying trees are more vulnerable to attack than healthy ones. The most attractive breeding sites are fresh stumps. The population density of the beetles is higher in the forests on northern slopes than on southern slopes. Most of the bores in the trunk are less than 0.5 m above ground; the galleries are found also on roots.

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Association of exposure to ambient air pollution with ovarian reserve among women in Shanxi province of north China

Environmental Pollution ◽

10.1016/j.envpol.2021.116868 ◽

2021 ◽

Vol 278 ◽

pp. 116868

Author(s):

Xiaoqin Feng ◽

Jinhong Luo ◽

Xiaocheng Wang ◽

Wolong Xie ◽

Jiao Jiao ◽

...

Keyword(s):

Air Pollution ◽

Ovarian Reserve ◽

North China ◽

Ambient Air ◽

Ambient Air Pollution ◽

Shanxi Province

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Groundwater Quality and Potential Human Health Risk Assessment for Drinking and Irrigation Purposes: A Case Study in the Semiarid Region of North China

Water ◽

10.3390/w13060783 ◽

2021 ◽

Vol 13 (6) ◽

pp. 783

Author(s):

Feifei Chen ◽

Leihua Yao ◽

Gang Mei ◽

Yinsheng Shang ◽

Fansheng Xiong ◽

...

Keyword(s):

Groundwater Quality ◽

Human Health ◽

Health Risks ◽

North China ◽

Shanxi Province ◽

Hydrochemical Characteristics ◽

Human Health Risks ◽

Drinking And Irrigation ◽

Hydrochemical Types ◽

Potential Human Health

Groundwater is a valuable water source for drinking and irrigation purposes in semiarid regions. Groundwater pollution may affect human health if it is not pretreated and provided for human use. This study investigated the hydrochemical characteristics driving groundwater quality for drinking and irrigation purposes and potential human health risks in the Xinzhou Basin, Shanxi Province, North China. More specifically, we first investigated hydrochemical characteristics using a descriptive statistical analysis method. We then classified the hydrochemical types and analyzed the evolution mechanisms of groundwater using Piper and Gibbs diagrams. Finally, we appraised the groundwater quality for drinking and irrigation purposes using the entropy water quality index (EWQI). We assessed the associated human health risks for different age and sex groups through drinking intake and dermal contact pathways. Overall, we found that (1) Ca-HCO3 and Ca·Mg-HCO3 were the dominant hydrochemical types and were mainly governed by rock weathering and water–rock interactions. (2) Based on the EWQI classifications, 67.74% of the groundwater samples were classified as medium quality and acceptable for drinking purpose. According to the values of sodium adsorption ratio (SAR), residual sodium carbonate (RSC) and soluble sodium percentage (%Na), 90.32% of the samples were suitable for irrigation, while the remaining samples were unfit for irrigation because of the high salinity in the groundwater. (3) Some contaminants in the groundwater, such as NO3−, NO2− and F−, exceeded the standard limits and may cause potential risks to human health. Our work presented in this paper could establish reasonable management strategies for sustainable groundwater quality protection to protect public health.

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Interaction of Nitrogen and Phosphorus on Wheat Yield, N Use Efficiency and Soil Nitrate Nitrogen Distribution in the North China Plain

International Journal of Plant Production ◽

10.1007/s42106-020-00093-6 ◽

2020 ◽

Vol 14 (3) ◽

pp. 415-426

Author(s):

Yulu Chen ◽

Panpan Zhang ◽

Lifang Wang ◽

Geng Ma ◽

Zhuo Li ◽

...

Keyword(s):

North China Plain ◽

North China ◽

Nitrate Nitrogen ◽

Wheat Yield ◽

Soil Nitrate ◽

Nitrogen And Phosphorus ◽

The North ◽

The North China Plain ◽

Use Efficiency ◽

N Use

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Morphological and molecular characteristics of Bastiania sinensis sp. n., Tripyla aquatica Brzeski & Winiszewska-Ślipińska, 1993 and T. setifera Bütschli, 1873 (Nematoda: Triplonchida) from Shanxi Province, North China

Nematology ◽

10.1163/15685411-bja10090 ◽

2021 ◽

pp. 1-23

Author(s):

Mei Na Liu ◽

Yu Mei Xu ◽

Zeng Qi Zhao ◽

Jian Ming Wang

Keyword(s):

North China ◽

Large Subunit ◽

Small Subunit ◽

Rrna Genes ◽

Shanxi Province ◽

Molecular Characteristics ◽

Separate Species ◽

Using Data ◽

First Time ◽

Respective Species

Summary This paper describes a new species of Bastiania, presents a new record and redescribes a known species of Tripyla. These nematodes are all in the order Triplonchida and were collected from Shanxi Province, North China. Bastiania sinensis sp. n. is characterised by having the female with a relatively slender body 1049-1295 μm long, dorsally arcuate after heat relaxation, with outer labial setae and cephalic setae in a single circle, an oval amphid, 7-8 laterodorsal cervical setae scattered in the pharyngeal region, orthometamenes and pseudocoelomocytes present, tail conoid with a mucron 1-2 μm long, two pairs of caudal setae present, a = 58.1-75.5, b = 4.0-4.6, c = 12.7-19.7, c′ = 4.1-7.8 and V = 61.1-67.7. Males were not found. Tripyla aquatica is recorded for the first time from China, and is redescribed. Tripyla setifera has been reported from China but without a detailed description – now provided. In addition, phylogenetic relationships among the species were analysed using data from the near full length small subunit (SSU) and D2-D3 segments of large subunit (LSU) of rRNA genes. Bastiania sinensis sp. n. is monophyletic with the Bastiania sequences available in GenBank, but is on an independent branch supporting its status as a separate species; T. aquatica and T. setifera are monophyletically clustered with known Tripyla species and grouped together with sequences from their respective species.

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