中国佛手瓜资源调查初报   总被引：6，自引：0，他引：6  

叶淑静  杨寅桂 《江西农业大学学报》1995,17(4):471-476

佛手瓜是珍贵的蔬菜资源，国外称之为“超级蔬菜”。通过对我国佛手瓜资源的调查，初步查明了佛手瓜在我国的分布、来源及主要品种类型，观测了植物学性，探索了我国佛手瓜栽培技术关键。  相似文献   

棉仁(籽)饼—玉米型肉仔鸡饲粮的研究     

霍启光  林理真  邵榴  孙万岭 《北京农学院学报》1988,(3)

用LOHMANN品种肉仔鸡608只进行两次试验,研究了棉仁(籽)饼—玉米型饲粮的应用问题,单因子设计。第一次试验给饲八种试粮:(1)、棉仁饼(CSM)为0,游离棉酚(FG)为0;(2)、CSM为7.5%,FG为111ppm;(3)、(2)+亚铁离子(Fe~(++))111ppm;(4)、CSM为15.0%,FG222ppm;(5)、(4)+F~(++)222ppm;(6)CSM为30％,FG为444ppm;(7)、(6)+Fe(++)444ppm;(8)、(6)+L—赖氨酸(Lys)。第二次试验给饲4种试粮:(9).CSM:大豆饼(SBM)=20:80,粉料;(10).CSM:SBM=50:50,粉料;(11).CBM:SBM=100:0,粉料;(12)、(11),颗粒料。结果:(1)、CSM配比为0—7.5—15.0—30.0%,FG为0—111—222—444ppm时,不经任何脱毒处理,各组49日龄增重(分别为1779.3—1853.8—1861.3—1819.0克)、累积耗料(分别为3978—4217—4208—4158克)、耗料比(分别为2.24—2.27—2.26—2.29)等均未随FG水平提高而产生有规律的明显差异;鸡肝脏残留FG均在安全水平以下;氰化高铁血红蛋白(CNMHb)在正常生理范围以内。(2)、日粮FG为111—222—444ppm时,分别添加111—222—444ppm的Fe~(++)后,对试粮各项生产指标、能量代谢率、蛋白质表现存留率、鸡肝脏残留FG水平、血液CNMHb量均未发生明显影响。(3)、当CSM:SBM分别为20:80、50:50、100:0,构成等蛋白质(%),不等能量浓度(不以饲料脂肪调整)的试粮,试鸡各项生产指标差异均不显著(P>0.05)。(4)、CSM配比为30%时,添加L—Lys,将Lys:精氨酸(Arg.)由1:1.6～1.7调整为1:1.2。结果,Lys:Arg.平衡组(为1:1.2时)试鸡49日龄体重明显较高,但累积耗料量、耗料比,试粮能量代谢率、蛋白质表观存留率差异均不显著(P>0.05)。(5)、用棉仁饼100%地取代豆饼的低能量浓度试粮,经颗粒加工后,其饲料进食量,增重量明显提高。  相似文献   

南瓜品种比较及其栽培技术的研究   总被引：4，自引：0，他引：4  

张建华  陈火英等 《上海交通大学学报(农业科学版)》2001,19(1):66-68

本研究选用上海效区和江浙一带露地主要栽培的南瓜品种6个，环棚主要栽培的品种4个，经过随机排列，3次重复的田间试验设计，进行严格的品种比较试验，试验结果表明，从产量性状看，露地栽培条件下，久藏青，人头南瓜和枕头南瓜极显著高于黄囊南瓜和浙引93－2，山西无蔓产量最低；环棚栽培条件下，东升南瓜级显著高于南瓜，栗晶南瓜和锦栗南瓜，从品质看，露地栽培条件下，黄囊南瓜和浙引93－2优于其它露地参加试验的4个品种；环棚栽培条件下，东升南瓜和栗晶南瓜优于其他2个品种，可见黄囊南瓜和东升南瓜为上海市郊南瓜种植的首选品种。  相似文献   

前或后期限食对猪生长及体成分的影响     

霍贵成 《东北农业大学学报》1991,(3)

本试验用长×(杜×哈)杂种猪12头,随机分为3组。在总采食量相等的前提下,每组接受一种处理:日采食量均等分配直线增加(一组);前50天1组的70%给食,后50天均等增加至总量(2组);3组与2组正相反。试验由活重40kg开始至处理100天结束,并全部屠宰测定。a.生长期轻度限食,日增重降低,但后期表现出明显的补偿作用。最终体重大,全期日增重高。b.育肥期限食可得到较瘦的胴体,背膘较薄。c.后期限食使肝、肾和消化道总鲜重降低。  相似文献   

Consumption strategies in Mexican rural households: pursuing food security with quality     

Kirsten Appendini  Ma. Guadalupe Quijada 《Agriculture and Human Values》2016,33(2):439-454

Food quality is an important issue on the global agenda, particularly in high- and middle-income economies, but of little concern in designing Mexico’s food policy. Food policy has focused on quantity and in the case of maize, on satisfying domestic demand by supporting large commercial agriculture and importing from abroad. However, and as argued in this paper, obtaining a food staple (maize-tortilla) of quality is also an important issue for rural households and contributes to motivating continued smallholder production. Based on case studies in the rural district of Atlacomulco, in the state of Mexico, as well as in two regions of the state of Chiapas, this paper analyzes the production and consumption strategies of rural households. We focus on goals of food security and quality and note differential trends among households of varying characteristics and local contexts. We find that the motivation of small-scale producers to grow maize should be supported by Mexico’s food policy.  相似文献   

Action research on alternative land tenure arrangements in Wenchi,Ghana: learning from ambiguous social dynamics and self-organized institutional innovation     

Samuel Adjei-Nsiah  Cees Leeuwis  Ken E. Giller  Thom W. Kuyper 《Agriculture and Human Values》2008,25(3):389-403

This study reports on action research efforts that were aimed at developing institutional arrangements beneficial for soil fertility improvement. Three stages of action research are described and analyzed. We initially began by bringing stakeholders together in a platform to engage in a collaborative design of new arrangements. However, this effort was stymied mainly because conditions conducive for learning and negotiation were lacking. We then proceeded to support experimentation with alternative arrangements initiated by individual landowners and migrant farmers. The implementation of these arrangements too ran into difficulties due to intra-family dynamics and ambiguities regarding land tenure. Further investigations to find out how ambiguities could be tackled revealed that the local actors themselves had taken initiatives towards developing institutional innovations to reduce ambiguities. However, there is still considerable scope for further development of these self-organized innovations. The article ends with a reflection on inter-disciplinary action research, where it is argued that making “mistakes” is an inherent and necessary characteristic in action research that aims to address complex social issues.

Samuel Adjei-NsiahEmail:

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“<Emphasis Type="Italic">Chasms</Emphasis>” in agrifood systems: rethinking how we can contribute     

William H. Friedland 《Agriculture and Human Values》2008,25(2):197-201

The reaction to conventional agriculture and food systems has generated a host of alternative social movements in the past several decades. Many progressive agrifood researchers have researched these movements, exploring their strengths, weaknesses, and failures. Most such research is abstracted from the movements themselves. This paper proposes a new way of self-organization that, while fulfilling traditional university demands on researchers, will provide research support for progressive agrifood movements by transcending the boundaries of disciplines and individual universities.

William H. FriedlandEmail:

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William H. Friedland   is Professor Emeritus at the University of California, Santa Cruz where his research continues on commodity systems, wine and grapes, the globalization of agriculture and food, and exploring ways to strengthen alternative social movements to subvert the dominant paradigm.  相似文献   

Management Zones Classified With Respect to Drought and Waterlogging     

Sofia Delin  Kerstin Berglund 《Precision Agriculture》2005,6(4):321-340

Within-field variations in potential grain yield may be due to variations in plant available soil water. Different water holding capacities affect yield differently in different years depending on weather. By estimating plant-water availability in different weathers, scenarios could be created of how yield potential and thereby fertilizer demand may vary within fields. To test this, measured cereal grain yields from a dry, a wet and an intermediate year were compared with different soil moisture related variables in a Swedish arable field consisting of clayey and sandy areas. Soil water budget calculations based on weather data and maximum plant available water (PAW), estimated from soil type and rooting data, were used to assess drought. A reasonable correlation between estimated and measured soil moisture was achieved. In the dry year, drought days explained differences in yield between the clayey and the sandy soil, but yield was better explained directly by maximum PAW, elevation, clay content and soil electrical conductivity (SEC). Yield correlated significantly with SEC and elevation within the sandy soil in the dry year and within the clayey soil in the wet year, probably due to water and nitrogen limitation respectively. Dense SEC, elevation and yield data were therefore used to divide the field into management zones representing different risk levels for drought and waterlogging. These could be used as a decision support tool for site-specific N fertilization, since both drought and waterlogging affect N fertilization demand.  相似文献   

Against the neoliberal steamroller? The Biosafety Protocol and the social regulation of agricultural biotechnologies   总被引：1，自引：0，他引：1  

Daniel Lee Kleinman  Abby J. Kinchy 《Agriculture and Human Values》2007,24(2):195-206

Through a discursive and organizational analysis we seek to understand the Biosafety Protocol and the place of socioeconomic regulation of agricultural biotechnology in it. The literature on the Protocol has been fairly extensive, but little of it has explored debates over socioeconomic regulation during the negotiation process or the regulatory requirements specified in the final document. This case is especially important at a time when the spread of neoliberalism is increasingly associated with deregulation, because it sheds light on the conditions under which circumvention of the market is deemed legitimate and socio-economic regulation of agricultural technology is possible. Daniel Lee Kleinman is a professor in the Department of Rural Sociology at the University of Wisconsin, Madison, where he is also affiliated with the Holtz Center for Science and Technology Studies and the Integrated Liberal Studies Program. He is the author and editor of a number of books, including Impure Cultures: University Biology and the World of Commerce (2003). Abby J. Kinchy is a PhD candidate in the Departments of Sociology and Rural Sociology at the University of Wisconsin, Madison. Her current research examines the controversies surrounding the genetic “contamination” of Mexican maize and Canadian canola.  相似文献   

转Bt基因棉的检测和抗虫性鉴定研究进展   总被引：2，自引：0，他引：2  

李长福  吴振廷  沈基长  张玉翠  林华峰 《安徽农业科学》2002,30(3):346-349

综述了转Bt基因棉的检测和抗虫性鉴定的研究概况,分别从外源Bt基因的检测、Bt毒蛋白的检测、标记基因的检测和抗虫性的鉴定4个方面进行了探讨,并提出了一些有待于研究的问题.  相似文献