检索结果-南通市图书馆

net primary production in three bioenergy crop systems following land conversion

Journal of Plant Ecology 2014年第5期7卷 451-460页

作者： Michael W.Deal Jianye Xu Ranjeet John Terenzio Zenone Jiquan Chen Housen Chu Poonam Jasrotia Kevin Kahmark Jonathan Bossenbroek Christine Mayer Department of Environmental Sciences University of Toledo2801 West Bancroft StreetMail Stop 604ToledoOH 43606USA Great Lakes Bioenergy Research Center Michigan State University164 Food Safety and Toxicology BuildingEast LansingMI 48824USA W.K.Kellogg Biological Station Michigan State University3700 East Gull Lake DriveHickory CornersMI 49060USA

Aims Identifying the amount of production and the partitioning to above-and belowground biomass is generally the first step toward select-ing bioenergy *** are very few existing studies on the dynamics of production following land *** objectives of this study were to(i)determine the differences in aboveground net primary production(ANPP),belowground net primary produc-tion(BNPP),shoot-to-root ratio(S:R)and leaf area index in three bioenergy crop systems and(ii)evaluate the production of these three systems in two different land use *** This investigation included biometric analysis of NPP on three agri-cultural sites converted from conservation reserve program(CRP)management to bioenergy crop production(corn,switchgrass and prairie mix)and three sites converted from traditional agriculture production to bioenergy crop *** findings The site converted from conventional agriculture produced smaller ANPP in corn(19.03±1.90 standard error[SE]Mg ha^(−1) year^(−1))than the site converted from CRP to corn(24.54±1.43 SE Mg ha^(−1) year^(−1)).The two land conversions were similar in terms of ANPP for switchgrass(4.88±0.43 SE for CRP and 2.04±0.23 SE Mg ha^(−1) year^(−1) for agriculture)and ANPP for prairie mix(4.70±0.50 SE for CRP and 3.38±0.33 SE Mg ha^(−1) year^(−1) for agriculture).The BNPP at the end of the growing season in all the bioenergy crop systems was not significantly different(P=0.75,N=8).

关键词： bioenergy crops land use change net primary production aboveground net primary production belowground net primary production

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

A test of two mechanisms proposed to optimize grassland aboveground primary productivity in response to grazing

引用

Journal of Plant Ecology 2012年第4期5卷 357-365页

作者： A.K.Knapp D.L.Hoover J.M.Blair G.Buis D.E.Burkepile A.Chamberlain S.L.Collins R.W.S.Fynn K.P.Kirkman M.D.Smith D.Blake N.Govender P.O'Neal T.Schreck A.Zinn Graduate Degree Program in Ecology and Department of Biology Colorado State UniversityFort CollinsCO 80526USA Division of Biology Kansas State UniversityManhattanKS 66506USA Department of Biological Sciences Florida International UniversityNorth MiamiFL 33181USA Department of Biology MSC03-2020University of New MexicoAlbuquerqueNM 87131USA Okavango Research Institute University of BotswanaPrivate Bag 285MaunBotswana School of Biological and Conservation Science University of KwaZulu-NatalPrivate Bag X01Scottsville 3209PietermaritzburgSouth Africa Department of Ecology and Evolutionary Biology Yale UniversityNew HavenCT 06520USA Scientific Services Kruger National ParkPrivate Bag X402Skukuza1350South Africa Department of Ecology and Evolutionary Biology University of CaliforniaIrvineCA 92697USA

Aims Mesic grasslands have a long evolutionary history of grazing by large herbivores and as a consequence,grassland species have numerous adaptations allowing them to respond favourably to *** empirical evidence has been equivocal,theory predicts that such adaptations combined with alterations in resources can lead to grazing-induced overcompensation in aboveground net primary production(ANPP;grazed ANPP>ungrazed ANPP)under certain *** tested two specific predictions from ***,overcompensation is more likely to occur in annually burned grasslands because limiting nutrients that would be lost with frequent fires are recycled through grazers and stimulate ***,overcompensation of biomass lost to grazers is more likely to occur in unburned sites where grazing has the greatest effect on increasing light availability through alterations in canopy *** We tested these nutrient versus light-based predictions in grazed grasslands that had been annually burned or protected from fire for>20 *** assessed responses in ANPP to grazing by large ungulates using both permanent and moveable grazing exclosures(252 exclosures from which biomass was harvested from 3192 quadrats)in a 2-year *** sites were located at the Konza Prairie Biological Station(KPBS)in North America and at Kruger National Park(KNP)in South *** KPBS,sites were grazed by North American bison whereas in KNP sites were grazed either by a diverse suite of herbivores(*** wildebeest,Burchell’s zebra,African buffalo)or by a single large ungulate(African buffalo).Important Findings We found no evidence for overcompensation in either burned or unburned sites,regardless of grazer ***,there was no support for either mechanism leading to ***,complete compensation of total biomass lost to grazers was the most common response characterizing grazing–ANPP relationships with,in some cases,undercompensation of grass ANPP being of

关键词： aboveground net primary production fire forbs herbivores savanna

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

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：