Results 11 to 20 of about 106 (58)
Characteristics of groundwater circulation in typical karst trough areas：A case study of Longtan trough valley in Youyang, Chongqing [PDF]
Although the southwest karst valley region of China has an abundance of groundwater resources, little is known about the variations in the karst trough valley’s groundwater types and their cycle features. Using the Chongqing Youyang Longtan trough valley
Lian LI +4 more
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Shuitu Baochi Xuebao, 2023 草甘膦除草剂是农业生产中不可或缺的物资,过量使用会导致大量草甘膦及其衍生物在土壤中残留,对生态环境安全构成威胁。通过系统阐述草甘膦在环境中的迁移转化过程,以及草甘膦对土壤生物及环境质量的影响,着重分析了草甘膦对土壤蚯蚓、微生物群落的毒理效应,草甘膦与土壤其他污染物的协同效应和草甘膦驱动土壤碳氮磷生物地球循环变化。同时指出当前研究的不足,并提出下一步研究的重点:(1)加强草甘膦的降解机制和影响因素的研究,并筛选更高效降解能力的微生物菌株,提高草甘膦降解效率和修复草甘膦污染环境的能力;(2 ...
张友 +4 more
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Integrative Conservation, Volume 3, Issue 3, Page 230-243, September 2024.Tropical secondary forest at early sucessional stage had higher diamter growth rate and mortality rate, however, these forests also are more risked to droughts and high temperatures. Rising temperatures and more frequent droughts may decrease the carbon sink capacity of tropical forest ecosystems. Abstract Tropical forests are major carbon sinks on the
Sai Tun Tun Oo +11 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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Structure characteristics of microbial community in acid mine drainage in Shandi River Basin [PDF]
In order to reveal the structural characteristics of microbial communities in acid mine drainage(AMD) under different redox environmental conditions and the interaction between microbial communities and groundwater environment, Select the typical ...
Chunhong ZHAO +7 more
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Influencing Factors of Dissolved Organic Carbon Isotope Determination in Water Samples of a Karst Area by Wet Oxidation Method [PDF]
Due to the high content of HCO3 − , low content of DOC and complex composition in the karst water, the current wet oxidation method for the determination of δ13CDOC needs to be improved.
Gaoyong LAN +4 more
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Shuitu Baochi Xuebao, 2023 为探究贵州表层土壤有机质的空间变异特征及其主要影响因素,使用贵州省第二次土壤普查资料中193个土壤剖面数据,结合贵州省气象资料、土地利用类型图及土壤类型图等资料,运用地统计学和多元回归分析各因素对表层土壤有机质空间变异的解释能力。结果表明:(1)贵州省表层土壤有机质含量范围为0.05%~36.68%,平均含量为5.23%±4.96%,变异系数为94.90%;(2)表层土壤有机质在空间分布上表现出东北部高,西南部较低的格局;(3)半变异函数分析表明,贵州省土壤有机质主要受自然因素影响,海拔、CEC ...
文鑫 +4 more
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, 2017 生长和适应于喀斯特地貌环境的生态系统,即喀斯特生态系统,因人类活动干扰和石漠化进程影响,其结构和功能均发生退化,因此,定位、长期监测喀斯特生态系统的组成、结构、过程和功能,以及人类活动的影响和响应,对研究该类特殊生态系统的格局和动态变化具有重要意义。作为中国科学院生态系统观测网络(CERN)仅有的两个喀斯特台站之一,普定喀斯特生态系统观测研究站的生物监测总目标是开展喀斯特高原常绿落叶阔叶混交林的植被生态学(结构、过程、功能)监测与研究,及其退化植被的恢复生态学示范 ...
倪健 +24 more
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Shuitu Baochi Xuebao, 2002 对贵州喀斯特山区的土壤侵蚀所产生的环境变异作了论述。贵州喀斯特山区的土壤侵蚀不仅使土壤质量发生变异，而且对生态环境、农业生产环境都产生了十分严重的影响。自然植被减少、土地退化、石漠化已成为贵州喀斯特山区环境变异的重要特征。贵州喀斯特山区生态系统结构和功能的重建是治理贵州喀斯特环境变异的根本途径。
林昌虎 朱安国
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Shuitu Baochi Xuebao, 2018 日趋严重的西南喀斯特石漠化问题，已严重威胁该地区的生态环境安全、人民生活和社会经济发展。系统综述了喀斯特石漠化的研究进展，主要针对石漠化概念、石漠化类型界定标准、成因等进行了论述。同时，针对喀斯特地区水土流失的研究动态进行了总结，阐述了石漠化与水土流失的相互关系，重点揭示了当前喀斯特地区地下水土流失研究存在的问题与不足。进而根据当前研究热点和不足进行了展望，提出下阶段的研究重点，即：根据当前工作重心重新制定石漠化类型界定标准，从研究方法和技术上革新，推进喀斯特地下水土流失机理及量化研究 ...
戴全厚, 严友进
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