云南迪庆金江木耳驯化栽培研究     

杨春燕  ;张朝宾  ;王兴红 《中国食用菌》2014,(5):14-16

云南省迪庆州香格里拉县金江镇打芝坝村仿野生黑木耳栽培技术极其原始,管理粗放,产量极低,但该种木耳口感细腻,品质极佳,价格高昂。为了提高产量,增加经济效益,研究组对该木耳进行了菌种分离（菌株YUCM510200）、鉴定,以及菌株的耐高温和栽培实验研究。研究结果显示,该木耳耐高温,出耳速度快,耳基致密,耳片为薄片型,菊花状,孕面呈灰黑色,背面有毛。产品外观、口味和仿野生栽培的木耳基本相同,只是在泡发时的香气较弱;生物学效率为每公斤干料产鲜木耳1300 g,以干品计为100 g。该品种由于耐高温能力强,在热带地区具有推广价值。  相似文献   

延边州水文站网布局分析与对策研究     

余凤  赵春子  朱卫红 《安徽农业科学》2014,(28):9891-9893,9999

结合吉林省水文水资源局延边分局1956～2010年径流数据和最新水文站网资料,对现有各类水文站网的分布情况和存在问题进行分析,结果表明：延边州在开山屯站和河东站、河东站和圈河站之间应补充相应的大河控制站,在空白区域内补充区域代表站,结合水资源分区特征增设雨量站,并依托现有水文站增加蒸发观测项目,由此满足流域内的防洪抗旱、水生态与环境保护等方面的需求.  相似文献   

Michigan State University Extension Portal Planning and Implementation     

《Journal Of Agricultural & Food Information》2013,14(4):53-61

ABSTRACT

Michigan State University Extension is launching a portal-based information system to help address information delivery, archiving, and cataloging, in addition to geographic dispersion and time and/or budget constraints. The system, expected for public launch during the first quarter of 2005, is described from the planning stages to current configuration. Library staff are cataloging and loading organizational content and helping to develop global content modules. Portal technology facilitates workgroup collaboration–a major design goal in addition to information management and delivery.  相似文献   

青海省玉树州高原暴雨型泥石流形成机制——以称多县拉隆沟泥石流为例     

高波  王佳运  张成航  冯卫 《水土保持通报》2016,36(2):28-31

[目的]对青海省玉树州高原暴雨型泥石流形成机制进行研究,旨在为此类泥石流灾害防治及风险减缓提供依据。[方法]以青海省玉树州称多县拉隆沟暴雨型泥石流为例,通过实地调查对其形成因素及形成机制进行研究。[结果]该泥石流主沟道长约3km,流域面积5.25km~2,纵坡比降212‰,高差约600m。物源区发育滑坡方量约为6.50×104 m~3,流域内冲出泥石流物质共约8.5×104 m~3,沟道内物源补给量2.0×104 m~3。[结论]青海省玉树州高原暴雨型泥石流的启动模式可总结为:滑坡—物源形成—固体物质起动—沟道侵蚀—泥石流形成。  相似文献   

A biologically-consistent stand growth model for loblolly pine in the Piedmont physiographic region, USA   总被引：1，自引：0，他引：1  

Oscar García  Harold E. BurkhartRalph L. Amateis 《Forest Ecology and Management》2011,262(11):2035-2041

A theory-influenced dynamical stand growth model formulation described well the behavior of thinned and unthinned loblolly pine plantations. A simplification containing few free parameters performed as well as a fully parametrized version. It seems particularly well suited to situations where available data is scarce. The stand model can be interfaced to additional climate, nutrition and carbon cycling modules for studying the effects of a changing environment.  相似文献   

Simulating Agricultural Conversion to Residential use in the Hudson River Valley: Scenario Analyses and Case Studies     

John?M.?PolimeniEmail author 《Agriculture and Human Values》2005,22(4):377-393

Land use changes threaten agricultural land. If agricultural land is going to be preserved, the social and economic causes of conversion must be understood. However, analyzing the causes of agricultural conversion is complex because trends need to be documented before analyzing the causes. One of the leading uses of agricultural land is for residential purposes. This paper projects residential development in a Hudson River Valley watershed within Dutchess County in New York State using an integrated modeling framework consisting of an econometric model, a geographic information system (GIS), and Monte Carlo simulation. The econometric model is used to project residential development, providing parcel-specific probabilities of residential development. The GIS is employed to extract socio-economic and county-level tax parcel data to be used in conjunction with bio-geophysical attributes, such as slope, soil, and location, to calculate and project growth trends on a residential level for undeveloped land parcels. Monte Carlo simulation is used to distribute these projections into the GIS to display outcomes of scenario analyses to provide policy-makers a demonstration of how policies would likely affect the agricultural landscape of the watershed. John M. Polimeni is an Assistant Professor of Economics in the Department of Humanities and Social Sciences at the Albany College of Pharmacy in Albany, New York. Dr. Polimeni received a PhD in Ecological Economics and a BS in Mathematics at Rensselaer Polytechnic Institute. His professional interests include: quantitative economics, spatial and regional economics, land use change, economic development, and graduate education in Ecological Economics. He is currently working on linking ecological economics with the laws of thermodynamics and neuroeconomics into one unified model.  相似文献   

美国·韩国及台湾农业现代化对我们的启示   总被引：2，自引：0，他引：2  

何丽双 《安徽农业科学》2007,35(6):1802-1804

发达国家和地区解决农业现代化问题的经验是一笔宝贵的世界遗产,值得仔细地发掘和整理,为我们所用。以美国、台湾和韩国为例分别进行了研究。  相似文献   

芦笋花的形态研究     

陈之欢 《北京农学院学报》1994,(1)

本文描述了芦笋两个品种花的形态，用体视显微镜观察了芦笋品种玛丽华盛顿的雄花、雌花、两性花和芦笋品种ＵＣ７２雄花、雌花、变异雌花。我们比较了这些花的主要特征，发现一些显著的差异，可能两性花是雄花与雌花的中间类型，单子叶植物与双子叶植物的区别不是绝对的。  相似文献   

城市景观环境的研究——兼论呼和浩特市景观环境的现状及对策   总被引：1，自引：0，他引：1  

段广德  张韬 《内蒙古林学院学报》1997,19(2):61-68

通过城市景观的分析，提出了呼和浩特市景观环境存在的问题和解决的办法。  相似文献   

黑龙江国营农场农机更新换代发展战略研究     

朱奎林  郭仁华 《黑龙江八一农垦大学学报》1991,(1):1-8

根据黑龙江垦区50亿公斤商品粮基地建设发展规划的要求,针对垦区农场目前农业机械严重老化超限的实际情况,通过调查,用予测分析法提出应采取“一稳两步”的战略方案实施农业机械的更新换代,即稳定超限量,第一步更新与换代相结合,第二步以换代为主的方案,分析了黑龙江垦区的基本环境和条件。  相似文献