对《企业会计准则第5号——生物资产》的理解与思考

从新旧准则的区别以及与国际准则的趋同存异方面阐述了新的生物资产准则,并初步探讨了新准则对农业类上市公司的影响。     

基于脆弱性理论东北地区典型煤炭城市社会系统研究

从社会系统脆弱性理论入手，找出了灾害框架下和煤炭城市框架下社会脆弱性共性和个性。借助危险、灾害和脆弱性的关系，做出典型煤炭城市危险机制图。选定指标以后，利用层次分析法确定权重，进行胁迫现状评估和危险评估，最后做综舍分析。     

西北地区退耕还林还草后续产业发展对策研究

随着退耕还林还草工程在西北地区的进一步推进,该区生态环境得到了有效改善,当前退耕区农民所面临的新问题就是如何提高其经济收入,为了解决退耕区的长远发展问题,必须大力发展后续产业。在分析研究西北地区退耕现状及后续产业发展的基础上,针对当前西北地区后续产业发展缓慢及人们对后续产业发展缺乏认识等问题,指出该区后续产业发展必须立足于地域资源优势的发挥、依靠科技,大力发展生态农业及生态旅游,通过产业链延长,增加农民收入。     

厚层基材喷播技术在北方半干旱区岩石边坡植被恢复中的应用——以京承高速公路(三期)植被恢复工程为例

以京承高速公路(三期)岩石边坡植被恢复工程为例,研究厚层基材喷播技术的施工工艺及植被恢复效果,从抗旱乡土植物的筛选与配置、技术适宜性评价以及养护措施效果方面,综合分析归纳出厚层基材喷播技术,在北方半干旱地区岩石边坡植被恢复中的应用效果及关键技术,对于完善我国裸露边坡植被恢复理论体系,指导裸露坡面工程绿化,都具有非常重要价值。     

提高北方寒地冬小麦越冬率机制初探

在黑龙江省北纬Ｎ４６～４８°区域试种冬小麦，五年试验表明，以高越冬率为指标，分蘖节处于可溶性糖等光合产物峰值区的分蘖盛期，为抗寒的最佳状态，分蘖盛期分蘖节可溶性糖含量的高低，亦可为品种抗寒性选择的评价尺度。由于根前区对低温比分蘖节更为敏感，使冬小麦根前区位于温度和对稳定的３０ｃｍ地层以下，应是采取适当栽培的调控措施的目的。     

Spatial-temporal Patterns of Land-use Change in Typical Transect Area Along China National Highway 106 During 1996-2008

Based on land-use database updated with the survey of 1996, 2000, 2004 and 2008, this paper analyzed the land-use changes in the typical transect area along National Highway 106 with the aid of GIS technology and quantitative models. The results showed that arable land had been continuously decreased from 1996 to 2008, with a loss of 65.85× 10^3 hm2 and an average decrement of 5.49×10^3 hm^2 per year, and the loss in northern areas was larger; garden land and woodland were gradually centralized to the predominance area with an increment of 25.73×10^3 hm2 and 22.37×10^3 hm2, respectively; residential and industrial land increased year after year, and the transportation land showed the equalized developing spatial pattern; the increment of construction land and encroachment on arable land in the area were deeply influenced by the national macroscopic land-use policies, the rapid advance of urbanization and the development level of the regional economy. Through this case study, it is suggested that differential land- use policies should be adopted to create good environmental conditions to guarantee food security and to promote the economic development.     

Assesment of the Ecological Vulnerability on Sandy Desertification in the West of Northeast China

利用生态脆弱度的灰色评判法建立了沙质荒漠化的干扰－应变关系，进而求算了不同荒漠化程度样地的生态脆弱度，结合气候、地貌、植被、土壤等特征指标对东北西部沙质荒漠化地区土地荒漠化作出评价：该区的土地沙质荒漠化可分为强度沙漠化、中度沙漠化、轻度沙漠化、微度沙漠化、潜在沙漠化五个级别，各等级及其相应的生态脆弱性、植被群落多样性、群落稳定性等指标可用于中小尺度的荒漠化土地评价图的绘制，其可作为土地荒漠化防治的重要理论依据．     

中国甘肃东北部地区东方蜜蜂(Apis cerana)形态学研究

本研究采集甘肃东北部地区泾川蜂场、庄浪蜂场和平凉蜂场的东方蜜蜂Apis cerana43群,采样点地貌包括山地、丘陵和平原。运用蜜蜂形态学研究方法对东方蜜蜂40个形态特征指标进行测量分析。运用SPSS13.0对蜜蜂形态数据进行方差分析、主成分分析、聚类分析及环境因子相关性分析。研究结果表明:甘肃东北部地区不同采样点东方蜜蜂形态特征指标存在显著差异,而且与环境因素显著相关。     

Rapid Economic Change,the Nutrition Transition and Its Effects on the Structure of Consumption: The Nutrition Transition in China

SUMMARY

Economic, demographic, and technological changes have led to a marked shift in the diet structure and the distribution of body composition in many regions of the world. Such changes include rapid reduction in fertility and aging of the population, urbanization, epidemiological transition, and the uneven distribution of the effect of economic reform. Research presented for China shows that it is undergoing a marked shift in its diet, activity, and nutritional status patterns. This paper presents data on the shifts in the structure of food decision-making and the associated body composition shifts.