广昌县人工湿地污水处理模型

在环境和能源问题日益突出的时代背景下,将人工湿地应用于生活污水处理是当前十分推崇的新型污水处理方法,根据广昌独特的自然、社会、经济条件,设计相适应的人工湿地模型及植物配置,介绍人工湿地模型参数和运行过程中的技术问题及控制技术,为小城镇生活污水处理提供参考。     

杨树烂皮病的防治技术

本研究就杨树的烂皮病的发生时杨树的表现症状和规律进行了阐述,并提出防治技术,旨在降低杨树的发病率,达到降低经济损失的目的。     

菊花外植体分化诱导及植株再生研究初报

菊花是中国十大传统名花和世界四大切花之一,具有观赏、食用、药用等多种价值。笔者就菊花的再生途径、外植体选择、激素种类及配比进行了较为详尽的归纳和分析。结果表明,绝大多数研究者选择叶片或茎段作为外植体直接再生不定芽;常用激素浓度范围为：6-BA：0.5~3mg/L、NAA：0.1~1mg/L、2,4-D：0.5~1mg/L。最后,对目前存在的问题及今后的发展方向进行了探讨。     

西洋百合“卢浮宫”的组培技术研究

以鳞片为外植体、MS为基本培养基,以不同激素成分及不同质量浓度水平下诱导西洋百合"卢浮宫"的小鳞茎状突起,进行组培试验。结果表明:"卢浮宫"百合的诱导以取其完整的鳞片为外植体、并以鳞片背部突起处紧贴于MS+6-BA2.0mg·L-1+NAA0.2mg·L-1的培养基上诱导效果为最好。"卢浮宫"百合的诱导是由外植体(鳞片)产生小鳞茎状突起而分化成苗的,并不经愈伤组织分化产生。筛选出的最佳继代增殖培养基为MS+6-BA0.7mg·L-1+IBA0.3mg·L-1,生根培养基为1.2MS+6-BA0.3mg·L-1+IBA0 7mg·L-1。移植基质选择河泥和珍珠岩(体积比7∶3)混合,成活率达98%。     

处理主干和主枝对光皮树幼树早花早实的促进效果

对3年生光皮树幼树,采用环割倒贴皮、铁丝绞缢、绳索绞缢、环刻4种人工造伤方法分别对其主干和主枝进行处理.结果表明:4种处理方法对树干直径和冠幅生长的影响差异不显著;铁丝绞缢主枝法处理,其树高及开花株数和开花数量都与其他处理存在显著差异;铁丝绞缢主枝与铁丝绞缢主干法促进开花的效果差异不显著.     

遮光处理对天女木兰幼苗光合特性的影响

在生长季节,对天女木兰幼苗采取四个遮光率处理（A（CK）：0;B：30％;C：60％;D：90％）,采用Lcpro＋便携式光合测定仪测定天女木兰幼苗的净光合速率日变化,同时测定叶片叶绿素含量,结果表明：天女木兰净光合速率日变化规律在不同的遮光处理下均呈现双峰型曲线,有明显的光合“午休”现象,净光合速率日最大值为B＞A＞C＞D;在四种遮光处理中,叶绿素含量为D＞C＞B＞A.综合得出：苗期采取30％遮光处理是最适宜的遮光率,适度遮光可促进幼苗生长.本研究为天女木兰在吉林地区的育苗、绿化应用提供了技术支撑.     

建立密植高产桑园的桑压条苗甲醛处理法

为了改造低产桑园、建立密植高产桑园,研究建立了提高压条苗生产效率的压条苗甲醛处理法,研究结果表明压条苗甲醛处理的生根数比环割处理增加130%,比非环割增加190%;压条苗甲醛处理的新根的生长比环割处理高1.5倍,比非环割处理高1.3倍;成苗率也是压条苗甲醛处理最好。该方法是一种高效成苗的方法。     

浅谈木材加工厂火险防范及处理方法

结合苇河林业局木材加工的特点和现状,论述了木材加工厂可以引起火灾的因素和危险性,并阐明了针对木材加工厂火险的防范措施和处理方法。     

飞船搭载番茄种子SP1的生物学效应

研究了 4个番茄品种经飞船搭载后 ,番茄种子的发芽、植株生长、果实和抗病性的影响。结果表明 :搭载番茄种子的发芽率和发芽势有一定的变化 ,这种变化随品种而异。番茄种子经搭载处理后 ,其平均初花期推迟 0 7～ 5 4d ,且株间变异增加 ;植株有矮化的趋势。空间条件对番茄第一花序节位、花序间隔节位、小花数、座果率及果实大小有一定的影响。此外还发现在叶形、果色等有变异的植株     

Treatment response and long term follow up in nineteen dogs diagnosed with chronic enteropathy in Australia

Chronic enteropathy (CE) in dogs is common worldwide, but little data is available from Australia. The aim of this study was to describe treatment response and long‐term outcome in a cohort of dogs with CE. Dogs were prospectively enrolled at Murdoch University and the University of Melbourne. After diagnostic investigation to rule out diseases other than CE, dogs underwent sequential therapeutic trials until achieving a clinical response (diet then antibiotics, and finally immunosuppressants). Success was defined as 75% reduction of clinical severity for a minimum of five weeks. A total of 21 dogs were enrolled, and 19 completed the study. One dog was euthanised for lack of response to treatment and one excluded for lack of owner compliance. Most dogs responded to diet (n = 10), followed by antibiotics (n = 7) and immunosuppressants (n = 2). Long‐term remission (median 21.1 months, [3.0‐44.7]) was achieved in eight out of ten dietary responders without additional treatment. In contrast, only two dogs with antibiotic response remained in long‐term remission, of which one needed on‐going antibiotic treatment. Longer term remission was achieved in the two dogs treated with immunosuppressants with on‐going low dose therapy. This study concludes that most dogs referred for CE in Australia respond to dietary treatment (even after previous dietary interventions), and remission is long‐term compared to dogs treated with an antibiotic. Furthermore, the need for long‐term antibiotics in some dogs to maintain response may lead to antibiotic resistance. This study supports adequate dietary trials for CE in dogs, and a need for alternative second‐line treatments.