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167 results on '"Zhang, Zaiwang"'

32. Accumulation of Co, Ni, Cu, Zn and Cd in Aboveground Organs of Chinese Winter Jujube from the Yellow River Delta, China

Author

Zhang, Zaiwang, primary, Zhang, Qiong, additional, Liu, Guoli, additional, Zhao, Jian, additional, Xie, Wenjun, additional, Shang, Shuai, additional, Luo, Jie, additional, Liu, Juanjuan, additional, Huang, Wenwen, additional, Li, Jialiang, additional, Zhang, Yanpeng, additional, Xu, Jikun, additional, and Zhang, Jiqiang, additional

Published
2022
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41. Effect of Parthenium hysterophorus L. Invasion on Soil Microbial Communities in the Yellow River Delta, China.

Author

Shang, Shuai, Zhang, Zaiwang, Zhao, Liping, Liu, Longxiang, Shi, Dongli, Xu, Hui, Zhang, Hanjie, Xie, Wenjun, Zhao, Fengjuan, Zhou, Zhihao, Xu, Jikun, and Wang, Jun

Subjects
MICROBIAL invasiveness, PARTHENIUM hysterophorus, MICROBIAL communities, BACTERIAL communities, SOIL microbiology, PLANT invasions, RHIZOBACTERIA, RHIZOSPHERE, WETLANDS
Abstract

Parthenium hysterophorus L., as an invasive plant, has negatively impacted the ecosystem functioning and stability of the terrestrial ecosystem in China. However, little information was available for its effects on microorganisms in the Yellow River Delta (YRD), the biggest newly-formed wetland in China. In the present study, high-throughput sequencing technology was used to obtain the bacterial community in soils and roots of different plant species, including P. hysterophorus and some native ones in the YRD. Our results showed that the Proteobacteria, Acidobacteriota, Gemmatimonadota, and Actinobacteriota were dominant in the rhizosphere soils of P. hysterophorus (84.2%) and Setaria viridis (86.47%), and the bulk soils (80.7%). The Proteobacteria and Actinobacteriota were dominant within the root of P. hysterophorus. A total of 2468 bacterial OTUs were obtained from different groups among which 140 were observed in all the groups; 1019 OTUs were shared by P. hysterophorus non-rhizosphere soil bacteria (YNR) P. hysterophorus rhizosphere soil bacteria (YRR) groups. The indexes of the ACE (823.1), Chao1 (823.19), Simpson (0.9971), and Shannon (9.068) were the highest in the YRR groups, showing the greatest bacterial community diversity. Random forest analysis showed that the Methylomirabilota and Dadabacteria (at the phylum level) and the Sphingomonas, and Woeseia (at the genus level) were identified as the main predictors among different groups. The LEfSe results also showed the essential role of the Acidobacteriota in the YRR group. The SourceTracker analysis of the bacterial community of the YRR group was mainly from GBS groups (average 53.14%) and a small part was from YNR groups (average 6.56%), indicating that the P. hysterophorus invasion had a more significant effect on native plants' rhizosphere microorganisms than soil microorganisms. Our observations could provide valuable information for understanding the bacterial diversity and structure of the soil to the invasion of P. hysterophorus. [ABSTRACT FROM AUTHOR]

Published
2023
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49. Contents of Heavy Metals in Typical Aquatic Products from a Market in Binzhou

Author

ZHANG Xuekang, ZHANG Zaiwang, REN Zhuang, ZHAO Linlin, YU Hui, and ZHAI Shenqiang

Subjects
Heavy metal, Aquatic product, Binzhou, Ingestion risk, Agribusiness
Abstract

To evaluate the levels of heavy metal pollution and risks in consumption of aquatic products from a market in Binzhou, the contents of Cu, Zn, Cd, Cr and Pb in the edible part of eight aquatic species such as Ctenopharyngodon idellus were determined by inductively coupled plasma mass spectrometry. The results show that the levels of the five elements differed among different species of aquatic products. The ability of bivalves to accumulate heavy metals was significantly higher than that of fish. Compared with relevant food hygiene standards, there was a certain excess of Cr in Ruditapes philippinarum and Penaeus vannamei. The results of human exposure risk assessment show that the THQ values of the heavy metals in the eight aquatic species were all less than 1, indicating that the consumption of these aquatic products had no potential non-carcinogenic risks.

Published
2019
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50. Spatial Distribution of Heavy Metals in Sediments of Tamarix chinensis Wetland on the South Bank of Bohai Bay

Author

ZHENG Huanqiang, ZHANG Zaiwang, and MA Junlu

Subjects
Bohai Bay, Tamarix chinensis wetland, Sediment, Heavy metal, Spatial distribution, Agribusiness
Abstract

In order to understand the spatial distribution of heavy metals in coastal wetlands, Tamarix chinensis wetlands on the south bank of Bohai Bay were selected as the research object. The content of Cr, Mn, Ni, Zn and Cu in soil was determined by sampling method in April 2018. The spatial distribution characteristics of heavy metals and causes were studied. The results showed that except for Cr, Ni and Zn, the content of other heavy metals in this area did not exceed the background value of soil environment in Shandong Province. The study area was slightly polluted by these three heavy metals. In the vertical direction, the content of Cr, Mn, Cu and Ni followed the law of surface layer>middle layer>bottom layer, while the content of Zn was higher in the bottom layer, which needed to be further studied. In the horizontal direction, the content of the five heavy metals was not significantly different according to the distance from the coastline. There was no significant difference in the content of heavy metals between rhizosphere soil and non-rhizosphere soil. There was a significant correlation between the content of heavy metal elements, except Mn, the content of heavy metals was significantly correlated with the content of soil organic matter. The content of some heavy metals was significantly correlated with the content of available phosphorus and ammonium nitrogen.

Published
2019
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