中文版 | English

在结果中检索

YIC-IR

浏览/检索结果: 共4条，第1-4条 帮助

限定条件        
已选(0)清除 条数/页：   排序方式：
渤海及牟平海洋牧场海域铂钯铑的地球化学特征 学位论文
理学博士, 北京: 中国科学院研究生院, 2018
作者:  刘凯
Adobe PDF(55975Kb)  |  收藏  |  浏览/下载：617/7  |  提交时间：2018/12/27
铂族元素  海水  有机质  颗粒物  地球化学行为  
降雨引起的干湿交替对土壤呼吸的影响:进展与展望 期刊论文
生态学杂志, 2018, 卷号: 38, 期号: 2, 页码: 567-575
作者:  李新鸽;  韩广轩;  朱连奇;  陈超男
Adobe PDF(1676Kb)  |  收藏  |  浏览/下载：476/215  |  提交时间：2020/07/08
土壤呼吸  土壤水分  降雨引起的干湿交替  土壤水分饱和或积水  soil respiration  soil moisture  drying-wetting cycle  soil water saturation  
外来入侵种互花米草防治研究进展 期刊论文
应用生态学报, 2018, 卷号: 29, 期号: 10, 页码: 3464-3476
作者:  谢宝华;  韩广轩
浏览  |  Adobe PDF(927Kb)  |  收藏  |  浏览/下载：1221/432  |  提交时间：2020/01/09
入侵  刈割  淹水  翻耕  除草剂  克隆苗  实生苗  Invasion  Mowing  Waterlogging  Plowing  Herbicide  Clonal Seedling  Seedling  
烟台夹河口外柱状沉积物还原性无机硫、活性铁的变化特征及其相互关系 期刊论文
海洋科学, 2018, 卷号: 42, 期号: 8, 页码: 90-97
作者:  姜明;  赵国强;  李兆冉;  盛彦清
浏览  |  Adobe PDF(1528Kb)  |  收藏  |  浏览/下载：525/230  |  提交时间：2020/07/08
还原性无机硫  活性铁  深层柱状沉积物  硫化度  矿化度  Reduced inorganic sulfur  Reactive iron  Deep core sediments  Degree of pyritization  Degree of sulfidity  The distribution characteristics and coupling mechanism of reduced inorganic sulfur (RIS)and reactive iron in marine core sediments are closely related to the evolution of environment quality.In this study,an improved cold diffusion method and hydrochloric acid extraction method were applied to the acid-volatile sulfur (AVS),pyrite sulfur (CRS),elemental sulfur (ES),and reactive iron [Fe (Ⅱ)and Fe (III)] analyses.The distribution characteristics and coupling mechanism of S and Fe were investigated based on a core sediment 4 meters deep collected in the northern sea area of the mouth of Jiahe River,Yantai.The results showed that the RIS in sediments was dominated by CRS,followed by AVS and ES.The content of AVS presented a narrow range with depth,whereas the CRS and ES were higher at the top and bottom layers than the middle layer  reactive iron was dominated by Fe (II),which increased with depth,while Fe (Ⅲ)gradually decreased with depth.Most of the Fe (III)was reduced to the disssolved Fe(II),which was combined with the soluble H_2S of the sulfate-reducing bacteria to produce CRS and ES in the deep layer,resulting in their accumulation at the bottom of core sediments.Furthermore,this study showed that reactive iron was not a limiting factor for the accumulation of RIS with lower degree of pyritization and degree of sulfidity.