北方农牧交错区奶牛场环境中微生物数量季节性变化的研究

本试验分别在春、夏、秋、冬四季对内蒙古西部农牧交错区一座奶牛场舍内外空气环境以及运动场土壤和饮水中微生物数量进行了监测。结果表明,奶牛场舍内空气及土壤和水中的总需氧菌数和大肠杆菌数均以冬季最低。     

城镇化进程分析及预测方法的研究——以甘肃省白银市城镇化发展为例

以甘肃省白银市城镇化发展为例，采用灰色关联度、人口状态递推模型及结构转化分析的方法，就城镇化发展的主要影响因素、总人口预测以及城镇化发展的趋势提出了一套系统的定量分析方法，对于我国城镇化进程的分析和预测具有一定的借鉴作用。     

空调制冷行业与环保的关系

本文就大气保护制冷行业的关系并从保护臭氧层、大气变暖的角度，论述了空调制冷行业与环保的关系。     

稻谷玻璃化转变温度的测定方法及影响因素研究进展

对可测量稻谷玻璃化转变的方法进行了比较分析。简述了稻谷在干燥缓苏过程中影响玻璃化转变的主要因素:温度梯度和水分梯度。在不同的水分梯度稻谷各部位发生玻璃化转变的情况不同,稻谷表面含水量较低,易发生玻璃化转变;而稻谷内部则处于橡胶态,从而产生不同的内应力使稻谷产生裂纹,降低整精米率(HRY)。     

Multifunctionality and agrarian transition in alternative agro‐food production in the global South: The case of organic shrimp certification in the Mekong Delta,Vietnam

Processes of globalisation in the conventional food provision system have had widespread negative impacts on small‐scale farmers. Yet, alternative food networks, which are characterised by more sustainable production/consumption practices and fairer trade relations, have increasingly been ‘going global’ and, in the process, have been integrating small‐scale farms in the South. One such high‐value export‐led commodity is certified organic shrimp. International third‐party certification schemes are becoming popular as a tool to verify the intangible attributes of such commodities. Using concepts of multifunctionality and agrarian change, this paper examines the implications of introducing an international environmental certification programme to a site where the ‘peasantry’ has been preserved and has limited integration in the global agro‐food system. Drawing on a case study that examines the first certified organic shrimp production project in Vietnam, this paper concludes that the current movement towards post‐productivism in the global North has potential to keep local farming practices in the global South by justifying the value of peasant‐like production methods through international certification. As a result, the development path of agrarian transition might be reshaped into a form not necessarily pursuing industrialisation. This leads to the new interpretation of pre‐ and post‐productivism beyond the North and South divide.     

从“资源互补”迈向“高端融合”

27年来基于资源互补的闽台农业合作已取得较好的成效,但在新的发展形势下也面临着合作战略的转型。文章运用理论分析与实证研究相结合的方法,通过对闽台两地农业发展现状的分析,指出高科技现代农业已成为闽台农业发展的共同方向,为适应闽台农业现代化发展的时代要求,促进闽台农业更好发展,需要进行合作发展战略调整,由“资源互补”迈向“高端融合”,以实现更高层次的合作双赢目标。     

姑婆山国家森林公园景观格局变化分析

根据姑婆山国家森林公园1999年和2009年森林调查资料,在ArcGIS和Fragstas 3.3的支持下对姑婆山国家森林公园景观格局动态变化进行研究。结果表明：研究期间,研究区主要景观类型没有变化,阔叶树、灌木林、杉木林3种主要景观类型面积占总面积的比例由80.44%提高到94.51%;景观基质均为阔叶林,占总面积比例由63.63%提高到75.82%;总斑块数量由301块下降到174块;平均形状指数呈下降趋势;多样指数由1.233下降到0.862;优势度指数则由0.846升高至1.217。总体表现为针叶林向针阔混交林,进而向阔叶林演替,景观趋向连续和稳定。     

The tyranny of taste: the case of organic rice in Cambodia

Fair-trade and organic products are often sold at price premiums justified by smaller production volumes that are associated with greater social and environmental responsibility. The consumption of these products confers on the consumer a greater sense of morality – and usually a claim to better taste. This paper tells the story of attempts to promote organic/fair-trade rice production by de facto organic Cambodian farmers for export to North American and European markets in order to assist poor farmers to trade their way out of poverty. It demonstrates that instead of promoting sustainable agriculture and fair trade between developed and developing markets, organic/fair-trade projects may impose First World consumer ideals and tastes that are out of step with the larger realities of agrarian transition in Cambodia and the wider region of developing Southeast Asia.     

温度势差驱动玉米去水试验研究

从能势转换的角度探讨谷物节能干燥工艺,即利用自然界自身存在的温度势差驱动谷物水分气化、迁移和扩散,达到去除高水分玉米水分和提高粮温的目的,并通过试验验证了该方法的可行性,为烘干机高效节能设计提供基础数据。     

Determination of fiber length and juvenile and mature wood zones in Acer velutinum Boiss. trees grown in Iran

In our investigation we studied fiber lengths and the transition age from juvenile to mature wood in Acer velutinum Boiss. For this purpose, samples from three normal maple trees at a Noshahr site in northern Iran were selected. Disks were cut at breast height. Test samples were taken along a radial direction from the pith to the bark, accounting for every ring during a 48-year period. We used the Franklin method to distinguish between fibers of juvenile and mature wood. The results show that the fiber length increased along the radial direction from the pith to the bark. The transition age between juvenile and mature wood was determined at the 14th annual ring from the pith.