福建省贮木场的发展出路

本文对福建省贮木场的发展历史进行扼要回顾,分析和评述了木材市场开放后福建省贮木场的现状,针对发展中存在的问题,并紧紧围绕经济发展的两个根本转变,对贮木场的发展出路提出看法。     

Spring Barley Responses to Row Spacing and Fungicide Triadimefon in Regions with a Short Crop-growing Season

Aspects of intensive management practices such as high-yielding cultivars, narrow-row spacings and fungicide treatments could potentially increase cereal yields in regions with a short crop-growing season and occasionally dry and hot weather. A field experiment was carried out at McGill University, Canada for three years (1987 to 1989) to test the effects of triadimefon (1-[4-chlorophenoxy]-3,3-dimethyl-1-[1H-1,2,4-triazol-1-yl]-2-butanone, or Bayleton, a trade name) fungicide (0 vs. 140 g a.i. ha⁻¹) and row spacing (10 vs. 20 cm) on the yield components, yield and other agronomic traits (spike emergence, days to maturity, leaf disease and plant height) of spring barley ( Hordeum vulgare L.) cv. Cadette, Laurier and Leger. A cultivar by row spacing interaction resulted in a 11 to 13.5 % increase in grain yield due to narrow rows for Laurier in two out of the three years and up to 16 % for Leger in one year. Over the three years grain yields were on average increased 6 to 12 % due to use of the narrower row spacing. Fungicide application to barley at the early heading stage effectively controlled leaf diseases without influence on yield components or grain yield. Our results indicate that some components of intensive management such as narrow row spacing can be applicable in regions with a short crop-growing season.     

现代集约化肉羊业主要关键技术研究与应用

专门化肉用种羊选定、引进后，通过适应性研究，在较大规模养羊业生产实践中。对现代集约化肉羊业的主要关键技术进行研究、完善和创新，组装集成并应用于生产。技术研究应用结果既为市场提供了大批专门化肉用种羊和优质安全的杂种肉羊，取得了高水平的研究成果及显著的经济效益和社会效益．又为我国目前正在迅速发展的集约化肉羊业提供了可靠的技术支持和理想的生产模式：从适宜的专门化肉羊品种到运用高效母羊快速扩繁技术．建立和完善有效的肉羊杂交利用体系，普遍应用种羊鲜、冻精生产大批肉用杂种羔羊，种植高产优质饲草及其科学加工调制和利用．建立严格兽医防疫制度．实行放牧 补饲或全舍饲的精细管理和集约化育肥，至生产优质、安全、标准肉羊，获得显著的经济效益和社会效益。     

长春市精明增长测评研究

“精明增长”是由西方国家针对城市蔓延提出的一种全新的城市发展理念,它倡导高效、集约、紧凑的城市发展模式,对于解决我国城市化进程中面临的诸多问题具有现实意义.该研究从城市增长的数量、强度、效益、循环和建设水平5个方面选取了8个指标建立城市精明增长现状测评体系,对长春市的精明增长现状进行测评.结果表明,长春市城市扩展速度较快,土地利用的集约度与强度均有待提高,但就城市经济发展、道路和公共交通现状来说,符合精明增长的发展方向.     

散叶堆积烘烤技术对烤烟综合效益的影响

为了进一步摸清散叶堆积烘烤技术对烤烟综合效益的影响,研究分析了2011年贵州正安县推广应用散叶堆积烘烤技术的相关数据.结果表明,散叶堆积烘烤相较常规挂竿烘烤,能省工节能、提质增效;其中,烤后烟均价、上等烟率和橘黄烟率分别提高0.33元/kg、5.78个百分点和3.52个百分点,杂色烟率降低0.97个百分点,烘烤环节用工成本降低0.53元/kg,能耗成本降低0.32元/kg,增加经济效益1.18元/kg.     

建设用地集约利用评价指标的权重确定方法研究

基于建设用地集约利用评价指标,应用文献统计法和综合分析法,阐述了中国建设用地及建设用地集约利用评价指标权重赋权方法的现状,着重研究了各种权重确定方法在建设用地集约评价中的实践应用,并对其进行总结和讨论,探讨了建设用地集约利用评价指标权重确定方法的发展趋势.     

密集烤房不同循环风机烘烤烟叶的色素降解及感官质量

采用三速和单速循环风机,研究密集烤房不同循环风机对烤烟色素及感官质量的影响.结果表明:采用三速循环风机烤后烟叶的叶绿素a、叶绿素b含量分别为5.10、167.74 μg/g,分别为单速循环风机的72.11％和93.30％;叶黄素、β-胡萝卜素、类胡萝卜素含量分别为0.84、155.56、156.40 μg/g,分别为单...     

不同能源类型密集烤房烘烤效果对比研究

[目的]探讨不同能源类型密集烤房的烘烤效果.[方法]2014年在云南大理进行了不同能源密集式烤房烘烤效果对比研究,通过试验分析了不同能源类型密集烤房在烘烤成本、经济效益及烤房温度控制等方面的烘烤效果.[结果]研究表明,最优处理为T2处理(25 kW内除湿热泵+20 kW电发热管辅助供热烤房),相比对照1 kg干烟可以减少烘烤成本1.28元,提高均价1.54元,中上等烟比例也有所提高,且烤房温度控制精准性好,其次是生物质燃烧机烤房和甲醇燃烧机烤房,但结合烤房的实际应用性,当前生物质燃烧机烤房最具推广价值.[结论]研究可为今后新能源烤房的开发与应用奠定基础.     

散叶烤房系列研究 2.装炕技术研究

为解决散叶烤房烟叶堆放问题，采用插板式装烟法和自然堆积法研究了散叶烤房的装炕技术，结果表明：散叶烤房装烟时以自然堆积法，稍稍用力推挤，单层密度保持在75~85kg/m3为宜，并提出了相应的采收和装炕技术要点，即下部叶适时早收，中部叶尚熟至适熟采收，上部叶充分成熟采收。装炕时烟束要叠放整齐，叶片背面靠向界墙方向，正面面向装烟者，保持叶片与装烟板水平面夹角70~80°，一层靠一层。     

Intensive hatchery performance of Pacific white shrimp in the biofloc system under three different fertilization levels

Bacterial inorganic nitrogen control using carbon:nitrogen ratio (C:N) manipulation is a tool for aquaculture systems. The present study assessed the hatchery performance of Litopenaeus vannamei between the mysis 1 and postlarvae 5 stages in a zero-exchange biofloc system under different C:N fertilization levels (10:1, 12.5:1 and 15:1) with dextrose. Water quality, performance parameters and water microbiology were compared among treatments. The mean values of the evaluated water quality parameters were appropriate for this production stage. Fertilization with dextrose efficiently controlled ammonia levels, which did not reach the average concentrations considered toxic for the species. In the 10:1 C:N ratio treatment, the levels of ammonia started to increase early and showed significantly higher levels from the third to the last experimental day. There was no difference among groups in means of survival (>76%) and dry weight (0.26 mg) of L. vannamei production parameters and water quality were maintained without water exchange using a biofloc system supplemented with dextrose. Therefore, the use of biofloc systems without water exchange with dextrose as a carbon source in C:N ratios of 10:1, 12.5:1 and 15:1 results in both adequate production indexes and water quality during the misis 1 to post-larvae 5 hatchery phases of L. vannamei. However, the ratios of 12.5:1 and 15:1 keep lower levels of ammonia.