基于组态的规模化鸭场粪污处理综合应用技术(英文)

[目的]探讨规模化鸭场粪污处理技术,以期为有效控制养殖场的环境问题提供指导方法。[方法]应用组态技术,结合物理畜牧技术、检测技术、生物消化技术以及EM菌技术,探讨对集约化鸭场粪污的无害化及资源化处理问题。[结果]基于组态的规模化鸭场粪污处理技术工艺简便,费用低廉。在整个养殖周期中可实现不使用任何抗生素,还能获得优质有机肥和高蛋白饲料,且不与其他动物争饲料,不产生二次废物,不会形成二次环境污染。经蚯蚓生物处理后的畜禽粪便氨气产量明显降低,不仅能显著减少空气污染,所生产的生物腐殖质,也为农业提供优质有机肥,而且能使贫瘠化的农业土壤得以复苏,可用于其他集约化养殖场。[结论]该研究为其他相关行业提供了一种以多技术集成的处理思路。     

海珠湖水生植物配置和应用研究．

通过对海珠湖水生植物的配置和在不同水体环境中的造景应用进行研究,总结了主要水生植物的景观特点和主要配置方式。     

浅析园林植物配置

基于对园林绿化植物配置的现状研究，指出目前园林绿化中存在的一些问题，并提出相应合理的植物配置原则及解决方法。     

催化转化器流场的数值模拟及对结构设计影响分析

通过采用计算流体力学数学模型对催化转化器内流场的数值模拟,并与实验结果进行比较,验证了模型的准确性。分析了不同的扩张管结构对流场的影响,从而得出入口扩张管形状对流动均匀性的影响。     

Variation in wolf spider (Araneae: Lycosidae) distribution and abundance in response to the size and shape of woodland fragments

The wolf spider (Lycosidae) community of open paddocks and five different configurations of woodland habitat in the wheatbelt of New South Wales, Australia, was sampled by nocturnal spotlighting. A total of 16 species was detected amongst the 2769 individuals that were sufficiently mature to allow identification, and 80% of these individuals were accounted for by just three species. There were no significant differences in the spider community among any of the woodland configurations, but the community of all five configurations differed significantly from that of open paddocks. However, only three species differed significantly in abundance between paddocks and the woodland configurations. Two species, Venator spenceri and Sp. C appeared to be less common in paddocks than in the woodland habitats, while Sp. A was more abundant in the paddocks. The percentage cover of thistles, medium grass and high grass, as well as the total abundance of Callitris glaucophylla were the habitat variables that best explained variation in the wolf spider community between woodland sites. Of these, thistle cover had the strongest correlation suggesting that disturbance, rather than cover per se, might be an important determinant of wolf spider communities. This study indicates that habitat fragmentation, at the spatial scale associated with current agricultural practices, may not be presenting a threat to generalist ground predators such as wolf spiders.     

Effect of laminate configuration on the modulus of elasticity of glulam evaluated using a strain gauge method

The purpose of this study was to measure the strain of glulam laminae by affixing a strain gauge at the central axis of the lateral face in order to determine the effect of the configuration of the glulam. Japanese cedar and southern pine were used in the study. The strain and stress of the laminae during the bending test were recorded, and the modulus of elasticity (MOE) was calculated. The influence of the MOE of the adhesive layers was also considered. Results showed that the MOE of the laminated elements increased as its specific gravity increased, although the specific gravity was not the only factor evaluated. The MOE of glulam (E _bsg) measured by the strain gauge method was very close to the observed MOE of glulam (E _b) and a significant linear relationship was identified. The MOE (e) of laminae measured by the strain gauge method was very close to that determined (E) under the “free condition” before bonding. The difference between the modified MOE (E _bsa) and E _bsg was not significant. The MOE of glulams made of heterogeneously graded lumbers were about 23% and 31% larger than the average MOE of their laminae for Japanese cedar and southern pine, respectively. The actual neutral axis was just below the longitudinal center line. It shifted slightly within the proportional limit range and moved downward when the load increased.     

小型木材除湿干燥设备的合理配置及应用

提出了小型木材除湿干燥机的结构及合理配置措施，降低操作技术难度的解决办法，以及适合小型木材加工企业应用的干燥工艺。分析表明，该设备具有性能稳定、性价比高等特点，在小型木材加工企业中有广阔的应用前景。     

湿地植物对去除重金属污染的研究

通过对人工湿地去污技术的研究,将多种常用湿地植物对各种污染因子的去除率进 行科属统计,统计具体到种的湿地植物对其对应污染因子的富集能力大小对比,使人们能正确的在功能上和景观上进行人工湿地的植物配置,得到有针对性、景观效果好的人工湿地.     

广西来宾市北之江流域水源涵养林优化配置策略

江河沿岸水源涵养林的优化配置是在对配置区域充分调查基础上依据现实资源情况及生态环境需要,特别是区域综合生态发展的要求上进行的,优化配置之关键在于对原来涵养资源的保护并采取技术措施加以资源优化。文章通过对广西来宾市北之江流域水源林的调查,以可持续发展理论按区域自然及经济条件对水源涵养林进行资源优化,以此来发挥北之江沿岸森林的涵养优势。     

虹鳟鱼卵形态观察初步研究

2001年8、9、10、11、12月和2002年12月进行了不同时间虹蹲鱼卵卵径的变化和不同颜色虹蹲鱼卵的吸水前后变化、采卵数、受精率的观察研究。结果表明：经方差分析体长、体重与卵径无相关性，而卵径与时间、水温有一定的相关性(r＝0．8354，r=—0．7634)；橘红色、淡黄色卵在吸水前后变化、采卵数、受精率等差异不大，橘红色卵的质量略高于淡黄色卵。