Heavy metal pollution in rural soil and ecological risk in Wanzhou District, Chongqing [PDF]
ObjectiveTo analyze and assess the pollution levels of lead (Pb), cadmium (Cd), and chromium (Cr) in rural soils of Wanzhou District, Chongqing Municipality, and to provide data support for proposing relevant measures and suggestions.MethodsBased on the ...
CHENG Longfeng +6 more
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厌氧条件在不同Fe( II) 浓度测定方法中必要性的比较研究 [PDF]
, 2016 厌氧是目前Fe(II)测定方法中常选择的处理方式,但是不可避免会给实验操作带来不便。为了方便、准确地测定铁还原体系中的Fe(II)浓度,对比研究了厌氧条件对草酸—草酸铵和盐酸两种典型浸提方法测定Fe(II)浓度的影响。结果表明:对于草酸—草酸铵浸提法,厌氧条件是必须的,以防止提取液中的Fe(II)被氧化,而且样品浸提1 h 便可用于Fe(II)的测定;然而对于盐酸浸提法,厌氧条件却并不是必须的,对Fe(II)浓度测定基本不产生影响。因此,为简化实验操作或在没有厌氧条件的情况 ...
刘芳华 +1 more
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Relationship between Available State and Forms of Selenium and Zinc in Farmland Soil of Luoyang City and Its Influencing Factors [PDF]
The form and available state of elements are important indexes to evaluate the activity of elements. Research on the relationship between the available state and form of selenium (Se) and zinc (Zn) in farmland soil is an important basis for accurate land
Jianchuan ZHOU +5 more
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Survey of viral diversity in the sediments of South China Sea [PDF]
, 2016 病毒是海洋生态系统中丰度最大，多样性最为丰富的微生物颗粒。海洋沉积物中的病毒丰度相比较海水中，要高1~2个数量级，并且其形态和基因型也更加多样。目前，人们对海洋沉积物中的病毒相关研究还比较少。为了增强对海洋沉积物中病毒的了解，本论文利用荧光显微镜法获得了珠江口沉积物以及南海北部和西部沉积物中病毒的丰度数据，并且通过病毒标记基因（g23&psbA）PCR扩增、克隆文库测序等分子技术获得了沉积物中T4类噬菌体和噬藻体类群的多样性信息。主要的研究结果： （1）荧光显微镜检测结果显示珠江口沉积物中病毒（4.49×
何茂求
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The health risk assessment of heavy metal pollution of marine food in Xiamen market [PDF]
, 2015 海产品味道鲜美、低脂、低胆固醇，是不可多得的健康食品，因此成为厦门居民餐桌上的常客。厦门地处东南沿海，海洋资源丰富，海产品的产量、居民的海产品消费量均位居全国前列。然而近年来包括厦门在内的我国近岸海域重金属污染情况的日益严峻将海产品的食用安全性推到了风口浪尖。鉴于此现状，本研究对厦门市售的4类12种海产品的典型重金属污染物铅（Pb）、镉（Cd）、铬（Cr）、总砷（As）进行监测和评价，同时对食用海产品的738名厦门市居民进行海产品膳食结构调查，利用美国环保署（EPA）推荐的健康风险评价模型 ...
闫双双
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Soil Preferential Flow Characteristics in Coal Mine Subsidence Area under Different Rainfall Duration [PDF]
[Objective] Research on the preferential flow characteristics triggered by cracks in coal mining subsidence areas can provide support for scientific and rational development of water resource management and ecological management practice in the mining ...
DAI Bin +4 more
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Distribution Pattern of Cadmium in the Profile of Shallow Fissure Soil and Its Influencing Factors in Karst Areas with High Geological Background [PDF]
[Objective] To study the vertical distribution pattern of cadmium (Cd) in shallow karst fissure soil, analyze the impacts of various factors on the distribution of Cd in fissures, and provide a scientific basis for future research on the distribution ...
CAI Huayin +6 more
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Research Progress of Nitrogen Leaching in Farmland Soil [PDF]
, 2014 对农田土壤氮素淋失的相关研究进行综述和总结是研究农业面源氮素污染的一个至关重要的前提。本文从土壤氮素渗漏淋失形态和迁移机理、氮素渗漏淋失的研究方法和影响土壤氮素渗漏淋失的因素三方面进行了详细的分析介绍,概述了近年来国内外农田氮素渗漏淋失的研究进展和研究成果,并在此基础上展望了未来氮素淋失研究工作的重点。研究结论对农田土壤的水肥管理措施及浅层地下水硝氮污染的减缓有一定的理论和借鉴意义Reviewing and summarizing the related research of farmland ...
朱木兰, 李青松, 王吉苹
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Spatiotemporal evolution and driving forces of the externality value in rice production: a study of 30 provinces in China from 2000—2021 [PDF]
Research on the indirect value of rice production has primarily focused on ecosystem service functions, with less emphasis on externalities. This article conducts an innovative evaluation of the externality value of rice production and its significant ...
Luo, Lizhuang, Wu, Sibin, Zhou, Rongji
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Phosphorus adsorption and desorption characteristics and its response to soil properties of black soil under long-term different fertilization [PDF]
, 2019 editorial reviewedObjective: Fertilizer is generally added to agricultural soil to meet the needs of crop production, but long-term over fertilization changes soil phosphorus (P) pool and soil properties.
Gao, HongJun +7 more
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