本溪市大气降尘及其组分变化规律的研究

对本溪市１９９１～１９９５年５年间降尘监测结果进行分析，找出其变化规律和分布情况，提出了改善大气环境质量的建议．     

废旧塑料及其再资源化

１、前言废旧塑料的处理问题，是九十年代全球性保护环境和节省资源对塑料工业的严峻挑战。这个问题的完善解决，也预示着世界塑料生产与应用技术上的突破性进展。随着我国塑料工业的日益迅速发展，我们也同样面临着废旧塑料的处理问题。若不采取积极措施解决，不仅会导致严重的环境污染，而且也会造成巨大的资源浪费。笔者从事此项工作已有十年，主要内容是如何使废旧塑料再资源化，现将一些认识与同仁交流。２、我国废旧塑料的产量及价值塑料制品因其用途不同而使用寿命长短不一，例如一次性使用的包装材料、农地膜、渔网等使用寿命为１～…     

《千年生态系统评估》

揭示生态系统变化对人类福祉的影响警醒决策者与公众做出积极反应。[编者按]     

Spatial variations in daily average CO2 concentrations above wetland surface of Xianghai National Nature Reserve, China

Horizontal and vertical variations of daily average CO2 concentration above the wetland surface were studied in Xianghai National Nature Reserve of China in August, 2000. The primary purpose was to study spatial distribution characteristics of CO2 concentration on the four levels of height(0.1 m, 0.6 m, 1.2 m and 2 m) and compare the differences of CO2 concentration under different land covers. Results showed that daily average CO2 concentration above wetland surface in Xianghai National Natural Reserve was lower than that above other wetlands in northeast China as well as the worldwide average, suggesting that Xianghai wetland absorbed CO2 in August and acted as“sink” of CO2. The horizontal variations on the four levels of height along the latitude were distinct, and had the changing tendency of“decreasing after increasing” with the increase of height. The areas with obvious variations were consistent on different levels of height,and those with the highest variations appeared above surface of shore, sloping field, Typha wetland and Phragmites wetland; the vertical variations were greatly different, with the higher variations in Phragmites wetland and Typha wetland, and the lands near the shore and the sloping field with the lower variations. Spatial variations of daily average CO2 concentrations above wet!and surface were affected by surface qualities and land covers.     

不同农业灌溉用水对土壤理化性质影响的研究

编者按 土壤管理和土壤利用方式影响着土壤的发育方向和土壤的性质(如土壤质地、土壤环境、土壤生态等).农业生产中对土地的不同管理措施或方式直接影响着农业土壤的发展方向和土壤环境变化.城市污水往往有较高的肥力,利用其灌溉农业,即能利用水源又能利用其中的肥源,有利于农业生产.     

新疆农用地变化的环境效应

土地生态环境问题一直都是专家、学者研究的热点话题,土地利用的生态环境效应更是人们日益关注的问题,以新疆1996-2004年农用地详查数据为依据,在分析研究土地利用的变化特点的基础上,阐述了农用地变化产生的环境效应.尽管农用地数量在整体上是增加的,但是土地沙化、退化,水土流失、生物多样性减少等一系列生态环境恶化现象仍在继续.因此,新疆农用地要在水资源的承载范围内适度增加.目前,新疆农用地变化给整体环境带来负面的效应,仅使局部生态环境改善,整体环境变坏.因此,新疆在土地利用中,要以此为鉴,加强生态环境建设,注重各种功能用地的结合.     

近地面总悬浮微粒（TSP）的季节变化规律与气象条件的关系

作者对郓城县一年来的TSP监测结果进行汇总分析，论述了TSP四季变化规律与某些气象条件的关系。     

高强铝合金超塑挤压成形

主要介绍了工业牌号高强铝合金在供应态或经简单预处理后在通用油压机上超塑成形的实例,并分析探讨了非理想组织材料超塑成形中微观组织的变化。