基于3D Max的数字蟹分类与描述系统

通过研究蟹族及科属,反复对比蟹类结构和区别,采用3D Studio Max和多媒体手段建立数字化可视蟹分类和描述系统,实现对螃蟹的分类检索和3D描述。     

蟹苗培育环境控制参数的选择研究

对河蟹蟹苗室内人工培育的实际工作过程进行深入调研,在试验分析的基础上得出蟹苗培育水质环境的控制参数及其最优范围为:pH值8.2～8.6;溶解氧Z1—Z2阶段大于5mg/L,Z3—Z5阶段大于6mg/L,Z5第4日—M阶段大于7mg/L;水温15～25℃;氨氮小于1.0mg/L。该结果可为蟹苗培育环境自动控制系统的设计提供依据。     

不同清林和抚育方式对马尾松幼林生长的影响初报

以往的造林清林方式和抚育方式对原有植被破坏严重,导致水土流失,同时费时费工。针对这些问题,采用双因素裂区试验进行了不同清林方式和抚育方式试验。头两年试验结果表明:定植穴清林方式与带状清林、全面清林不炼山及全面清林并炼山三种方式均差异显著;1年刀抚一次的与刀抚二次、刀锄并用一次、刀锄并用两次之间差异显著。以砍3米留1米的清林方式和一年刀锄并用抚育二次,对马尾松生长效果最佳。     

杉木幼林施肥效果试验研究

１９９２年开始实施的杉木幼林施肥实验表明：杉木幼林施肥效果显著，理想的施肥处理是氮、磷配合处理和氮、磷、钾全肥处理，即每ｈｍ２施氮１００ｋｇ、施磷５０ｋｇ，在缺钾地区配合钾肥施用效果更佳     

用木瓜蛋白酶水解蟹肉最佳工艺条件的选择

采用MFHX数据优化软件,经随机试验和质心计算,得出了木瓜蛋白酶水解蟹肉的最佳工艺条件为：酶底比3450U／g,固液比1：2．5,温度64．8℃,pH5,水解3h,水解率可达到89％左右,所得水解液中含有16种游离氨基酸,含量为1931．3mg／L。水解液有着浓郁的蟹香风味,与蟹的天然风味接近。     

杂种马褂木幼林生产潜力初步分析

对幼林杂种马褂木人工林进行了调查、分析,结果表明,杂种马褂木在福建省生产潜力较大。试验林生长较迅速,树高年平均生长量达0.79m,胸径达1.4cm;5年生时平均树高达3.92m,胸径达4.7cm。杂种马褂木适应性强,5年生时保存率高达99.00%以上,且生长稳定。杂种马褂木对立地条件要求不高,但对水分反应敏感,生长期内降水不足将明显影响其生长,应选择降水充足的林地造林。     

沱湖螃蟹地理标志知识产权保护的思考

介绍了我国河蟹地理标志资源,重点分析了沱湖螃蟹地理标志知识产权保护的现状,探讨了其发展对策,并提出几点针对性建议。     

超细蟹粉对污染水体重金属的吸附作用研究

[目的]研究超细蟹粉对污染水体重金属的吸附作用,使重金属回收再利用,解决水体重金属污染问题。[方法]将废弃蟹壳通过超细技术处理,以超细蟹粉为吸附剂,对水体中Pb2＋、Ni2＋、Cu2＋的去除进行静态吸附试验,研究蟹粉的细度、超细蟹粉用量、溶液初始pH、吸附时间、吸附温度等对吸附作用的影响,并确定最佳的吸附条件,以测定工业废水中Pb2＋、Ni2＋、Cu2＋的吸附率。[结果]超细蟹粉对Pb2＋、Ni2＋、Cu2＋吸附作用的最佳吸附条件为：在常温（25℃）,pH为6.0时,0.8 g超细蟹粉对Ni2＋和Cu2＋的吸附时间为120 min,而Pb2＋的吸附时间为150 min,可使吸附达到最佳状态。[结论]超细蟹粉对Pb2＋、Ni2＋、Cu2＋有很强的吸附能力,是一种有效的生物吸附剂。     

Changes in shorebird behaviour and distribution associated with an intertidal crab fishery

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Improved hatchery‐rearing techniques for juvenile production of blue swimming crab,Portunus pelagicus (Linnaeus, 1758)

The effects of tank colour, larval stocking density, antibiotic administration and water exchange on survival and moulting of blue swimming crab, Portunus pelagicus, were determined. Circular 4‐m³ experimental larval‐rearing tanks were used in triplicate for all treatments. White, dark grey, blue and brown were tested as tank background colours. The stocking densities tested were 10, 20, 40, 60, 80 and 100 larvae L^?1. The effect of oxytetracycline was estimated by comparing a treatment with oxytetracycline to a treatment without oxytetracycline administration. The daily water exchange rates tested were 0%, 25%, 50% and 100% of the tank volume. In all treatments, the larvae were fed with Artemia nauplii, rotifers and encapsulated Spirulina. The highest percentage survival was observed in the dark‐grey tanks when the stocking density of larvae was 20 larvae L^?1. No larva reached the juvenile crab size in white tanks. No significant difference in survival was found between treated and non‐treated larvae with oxytetracycline when the daily water exchange rate was more than 50%.