八种杀虫剂防治枇杷瘤蛾的药效试验

本文报道了８种杀虫剂防治枇杷瘤蛾的试验结果。结果表明，吡虫啉、丁硫克百威、喹硫磷、灭幼脲、氟虫脲的防效均在９０％以上，氧乐果、敌敌畏的防效较差     

人工挖孔桩在某大型工程项目中的应用

结合某大型工程项目，对工程地质情况和桩基础设计情况做了介绍，对人工挖孔桩的施工工艺进行了分析，并对人工挖孔桩的桩身质量检测结果进行了分析，结果表明所有人工挖孔桩的质量满足规范和设计要求，整个施工过程的质量和安全控制是有效的。     

N+注入对甘草幼苗部分耐旱特征效应的研究

植物幼苗主根、侧根及下胚轴的生长和根冠比值的大小是幼苗耐旱的重要特征.对甘草干种子注入能量为25 kev、注量为600×2.6×1013-3600×2.6×1013/cm2的N+,其中1800×2.6×1013/cm2的N+注入量能有效提高甘草6 d幼苗的主根生长和30 d幼苗根冠比干重和鲜重,促进侧根发生;也能明显刺激6 d和30 d幼苗的下胚轴和主根、茎高的生长.该参数可以作为沙漠化地区建立甘草植被发挥离子束注入当代效应的N+辐照的能量、注量的参考参数.在实验注入N+的参数范围内甘草幼苗耐旱特征的应答也表现出"损伤-修复-损伤"效应.     

沧浪亭古树树体现状和症状及保护技术措施研究

调研了沦浪亭现存古树的生长现状与病状,得知沦浪亭现有古树14株,分别属于9科10属,树龄为120～260年.沦浪亭古树总体得到了较好的保护,长势良好的古树9株,占64.29%,分别为银杏、柏树、罗汉松、桃仁树、香樟、瓜子黄杨、紫藤;需重点保护的古树5株,占35.71%,分别为女贞、桂花、枫杨,具体病状表现为树干腐蚀中空和洞穴状.基于需重点保护的5株古树的病状,笔者提出女贞和桂花的保护措施为:①对主干上穴口进行封实处理,②清除主干表层已腐烂木质并消毒、涂抹防腐蚀保护剂,③填补树干洞穴;枫杨的保护措施为:①清理洞穴内部、内壁,②对树干进行防腐消毒处理,③涂抹防腐保护剂.     

The Stimulation Effects of N^＋ Influence on Ion Beam on Liquorice and Its Water Stress

We have developed a large number of exocrine glands on liquorice leaves and facilitated polysaccharide secretion. Liquorice polysaccharide possesses stronger bound water affinity to gaseous water compared with sucrose and glucose. Our results show that the bound water affinity of liquorice polysaccharide to gaseous water is 49.75% higher than glucose （p〈0.01）. With N^＋ implantation （total dosage of 4.68×10^16 ions/cm^2 and energy of 20 keV） into dry liquorice seeds, both the bound water affinity to gaseous water and the bound water content of dry liquorice leaf can be significantly increased 30.24% （p 〈 0.01） and 36.51% （p 〈 0.01） respectively compared with the sham-irradiated seeds. Meanwhile, with these parameters chosen for N^＋ implantation into dry liquorice seeds, the leaf polysaccharide content under water stress （ψw=-1.5 MPa） can increase significantly （p 〈 0.05） and the plant growth can also improve significantly （p 〈 0.05）.     

N+注入对甘草叶片腺体和腺体分泌多糖及叶片多糖的影响

甘草叶片上生长有能分泌多糖的腺体,腺体分泌的多糖液累积于腺体头部呈透明"球状",功能叶上所有的腺体均向腺体头部分泌多糖液,枯黄衰老叶上的腺体头部仍然具有完整的呈"球状"的多糖液.对甘草干种子注入总量为4.68×1016/cm2、能量为10-25keV的N 对甘草叶片腺体数、腺体分泌多糖、叶内多糖、叶片总多糖均有刺激效应.其中15 keV的N 注入叶片腺体分泌多糖比对照提高44.1%(P＜0.01);甘草叶面腺体数和腺体分泌多糖呈明显的正相关(r=0.4537,P＜0.1).20keV的N 注入甘草叶片总多糖含量比对照提高31.8%(P＜0.01).这些N 注入甘草干种子的能量、注量参数可供对甘草进行离子束育种时参考.     

Effect of Ar Ion Beam Implantation on Morphological and Physiological Characteristics of Liquorice （Glycyrrhiza uralensis Fisch） Under Short-Term Artificial Drought Conditions

Ar^＋ ion beam with low energy of 30 keV was implanted into liquorice （Glycyrrhiza uralensis Fisch） seeds at the doses of 0, 600, 900 and 1200 × （2.6 × 10^13） ions/cm^2, respectively. The seeds were sowed in pots and after one month the plants were subjected to different drought conditions for two months. Then the plants＇ morphological and physiological characteristics, antioxidation enzymes and levels of endogenous hormones were investigated. The results showed that ion implantation at a proper dose can greatly enhance the liquorice seedlings＇ resistance against drought stress.     

N+注入对甘草多糖及耐渗透胁迫的影响

为研究N 注入对植物耐旱性的影响,实验以甘草为试材,以15%聚乙二醇(Polyethylene glycol,PEG)为渗透胁迫培养条件,研究不同能量的低能N 注入对甘草耐渗透胁迫的影响.结果表明,对甘草干种子注入总剂量为4.68×1016/cm-2,在15%PEG的渗透胁迫下,20keV的N 注入与对照相比,甘草株高生长增加40.2%(p＜0.01),叶内多糖含量增加84.8%(p＜0.01);在渗透胁迫下,株高生长和叶内多糖含量呈极显著正相关(r=.7166,p＜0.01).这一N 的注入参数可供提高甘草耐旱性种植,发挥当代刺激效应,对甘草进行离子束注入时参考.