检索结果-南通市图书馆

第三世界生态高峰会

作者： M.J.Helmers H.Asbiomsen r.kolka M.Tomer Iowa State University Ames IA Iowa State University Ames IA USDA Forest Service.Grand rapids.MN ArS National Soil Tilth Lab Ames.IA

Over a century of agricultural expansion and intensification in the Midwest region of the United States has transformed landscapes that were historically dominated by prairies,woodlands,savanna,and wetlands into landscapes that are dominated by annual crops of primarily corn and *** research assesses the potential to achieve significant improvements in water quality and flow regulation through strategic integration of small amounts of perennial vegetation embedded in agriculturally dominated *** ecohydrological functioning of annual(corn,soybeans)and perennial(prairie,savanna,

关键词： Water cycling under contrasting annual-perennial plant systems in agricultural landscapes in the Midwestern U.S

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

regeneration responses in Partially-Harvested riparian Management Zones in Northern Minnesota

引用

Journal of Water resource and Protection 2014年第6期6卷 556-564页

作者： Douglas N. Kastendick Brian J. Palik Eric K. Zenner randy K. kolka Charles r. Blinn Joshua J. Kragthorpe Penn State University University Park USA University of Minnesota St. Paul USA USDA Forest Service Northern Research Station Grand Rapids USA

Trees serve important functions in riparian areas. Guidelines often suggest how riparian forests should be managed to sustain functions, including tree retention and increasing the component of conifers and later-successional species. While regeneration of early successional species is not discouraged, there is uncertainty about the ability to regenerate the latter along with more desirable species. We investigated the regeneration of species differing in successional status and growth forms under different amounts of residual basal area. The study was conducted in riparian sites in northern Minnesota USA. At each site, one portion of the riparian area was uncut, while a downstream area was harvested to 16 or 8 m2·ha-1. Woody vegetation was sampled before and five-years after harvesting and summarized as early, mid-, and late successional hardwoods, as well as conifers and shrubs. After five years, the density of early successional trees was lower at 16 m2·ha-1 compared to 8 m2·ha-1;densities in both treatments were lower than in clearcuts. Densities of mid- and late successional hardwoods and conifers did not increase in either treatment. The higher basal area treatment resulted in a lower density of shrubs, which might be important for establishing more desirable tree species, although this may require additional activities to promote establishment.

关键词： riparian Management Overstory retention regeneration rMZ riparian Forest

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

生活方式干预对脂肪储存库动员的影响

引用

中华高血压杂志 2017年第12期25卷 1199-1199页

作者： Gepner Y Shelef I Schwarzfuchs D Zelicha H Tene L Yas-kolka Meir A Tsaban G Cohen N Bril N rein M Serfaty D Kenigsbuch S Komy O Wolak A Chassidim Y Golan r Avni-Hassid H Bilitzky A Sarusi B Goshen E Shemesh E Henkin Y Stumvoll M Blüher M Thiery J Ceglarek U ru-dich A Stampfer MJ Shai I 黄洁叶鹏

该研究的目的是评估不同的生活方式干预能否对身体的脂质储存部位产生不同的影响。方法：研究者在278名腹型肥胖（209名，占75％）或脂质代谢紊乱的成年人中进行了一项为期18个月的随机对照研究，提供午餐并对用餐情况进行监督。

关键词：生活方式干预储存脂质代谢紊乱脂肪随机对照研究腹型肥胖成年人

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

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

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：