检索结果-南通市图书馆

Fluxes,stocks and availability of nitrogen in evergreen broadleaf and fir forests:similarities and differences

Journal of Forestry Research 2021年第5期32卷 2059-2066页

作者： Panagiotis Michopoulos athanassios bourletsikas Kostas Kaoukis o.demeter-institute of mediterranean forest ecosystems terma alkmanos11528 athensgreece

In this study,nitrogen fluxes or flows in litterfall,nitrogen stocks and available nitrogen in soils of two plots representing evergreen broadleaf and Bulgarian fir forests were *** plots are in good quality sites and for this reason,the litterfall quantities and nitrogen fluxes were relatively *** woody litterfall flux of nitrogen was significantly higher in the fir forest than in the evergreen broadleaf *** total nitrogen stock was higher in the soil under the fir ***,the percentage of the available nitrogen(ammonium+nitrates)was significantly higher in the upper 20 cm soil layer of the evergreen broadleaf forest in spite of the higher average C/N ratios in the foliar litterfall of the broadleaf forest and insignificant difference of the C/N ratios in all soil layers of the two *** microclimatic conditions(higher soil temperatures in the evergreen broadleaf forest)is probable possible cause for this *** available nitrogen in the soils and its retranslocation from senescing leaves cover the nitrogen requirements of *** is hypothesized that trees may also take up nitrogen from deeper soil layers.

关键词： Maquis Fir Nitrogen Litterfall fluxes Soil

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Distribution and quantification of Pb in an evergreen broadleaved forest in three hydrological years

引用

Journal of Forestry Research 2020年第6期31卷 2225-2234页

作者： Panagiotis Michopoulos athanassios bourletsikas Kostas Kaoukis Marios Kostakis Nikolaos SThomaidis Ioannis IPassias Helen Kaberi Stelios Iliakis H.A.O.demeter-institute of mediterranean forest ecosystems terma alkmanos11528 athensgreece laboratory of analytical chemistry department of chemistrynational and kapodistrian university of athens15771 athensgreece institute of oceanography hellenic centre for marine research46.7 km athinon-souniou ave19013 anavyssosgreece

The distribution,quantification and fluxes of Pb were examined in an evergreen broadleaved forest in western Greece for three hydrological *** specifically,concentrations and annual fluxes of Pb were determined in bulk and throughfall deposition as well as *** Pb concentrations were also measured in forest floor and mineral soil up to 80 cm and the isotopic ratios of 206Pb/207Pb were determined in soil layers and the parent rock *** variability in the fluxes of the metal among the three hydrological years were found,evidence of the variability of Pb deposition in *** fractions with a large surface area,like holm oak flowers,had high Pb *** a steady state model and considering the Pb amounts in throughfall and litterfall as inputs on the forest floor,the mean residence time of Pb in the forest floor was 94 years with a coefficient of variation equal to 41%.More observations are needed to lower the variability of the mean residence *** isotopic ratio in the rock material was defined as the lithogenic *** statistical tests showed that the petrol derived Pb migrated to the depth of 20 cm and its percentages in the soil pedon was in the range of 62%in the L horizon to 11%in the 10–20cm *** higher depths(>40 cm)preindustrial anthropogenic Pb affected the isotopic *** the forest under consideration is remote from industrial activities,the results can serve as a baseline for future studies on Pb distribution and quantification.

关键词： Evergreen broadleaved forest Lead Throughfall Litterfall Forest floor Soil Isotopic ratios

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：