北京西山春季侧柏游憩林内挥发物成分及其日变化规律

The research adopts open sampling method and TCT-GC/MS (Thermodesorption Cold Trap-Gas Chromatography/Mass Spectrometery) apparatus to collect and analyze the volatile organic compounds(VOCs) of Platycladus orientalis forest, with the intention of researching the compounds and diurnal variation of VOCs of P. orientalis forest in natural state in Beijing Western Hills in spring. The results are as follows: (1) There are 160 kinds (11 categories) of volatile organic compounds, containing Alkyl Hydrocarbon, Ketone, Alcohol, Acid, Aldehyde, Alkene, Ester, Aromatic hydrocarbon, Ether, Hydroxybenzene and Amide. The content of Alkyl Hydrocarbon, Ketone, Acid and Aldehyde occupy a greater percentage among all compounds. (2) The diurnal variation curve of total volatile organic compounds (TVOC) is characterized as "one peak at 11:00(36.44%) and one vale at 3:00(12.76%)". Generally, the concentration at daytime is higher than that of night, and higher in morning than in afternoon, with the maximum at noon. (3) The change of Alkyl Hydrocarbon concentration is greater in the morning and about midday, less in the afternoon and night. The diurnal variation curve of Ketone concentration appears as "three peaks and three vales". 1:00, 5:00—7:00 and 11:00 are peak time, 3:00, 9:00 and 17:00 are vale time. As to Acid, its concentration appears two obvious phases: the higher phase is from 9:00 to 17:00, with the maximum at 11:00, and the lower phase is from 19:00 to 7:00, with the minimum at 5:00. Concerning Aldehyde concentration, 17:00 and 19:00 are the higher phases and also has obvious difference with other time, while the lower phrase has no obvious difference with each other. (4) Alkene is the most important compound to human health. Its concentration appears as "one peak" at 15:00, which has obvious difference with other time. Totally, its content at daytime is higher than that at night, and higher in afternoon than in morning.     

富路“领头凤”

江苏省东海县石榴镇新庄村女青年李玲利创业发家不忘众乡亲，积极带领周围众姐妹共同致富，今年以采，她投资11万元．购置40多台机械，创办了毛衣加工厂．先后吸纳48名女工进厂做工，每人每月收入1000元以上。图为女工们在加工毛衣。     

广西河池核桃示范园区土壤养分状况对比与分析

以广西凤山县、巴马县的4个核桃示范园为研究对象,采用"S"形取样法采集土壤样品,测定土壤pH、有机质、氮、磷、钾、硼含量等指标,比较分析其土壤养分状况,以期为核桃合理施肥提供参考依据。结果表明:4个核桃核心示范区土壤pH为6.52～7.38,土壤偏中性;土壤有机质含量为39.50～48.90 g·kg^-1,含量均较丰富;全氮、碱解氮含量分别为2.06～3.74 g·kg^-1、209.29～381.00 mg·kg^-1,土壤中氮素很丰富;有效磷含量为4.90～111.70 mg·kg^-1,其中坡茶村示范园含量最高,陇碰村示范园次之,而巴优村与弄者村示范园含量极少;速效钾含量为73.00～259.00 mg·kg^-1,坡茶村和陇碰村示范园含量较高,均大于200 mg·kg^-1,而弄者村示范园含量较低,仅73.00 mg·kg^-1;土壤有效硼含量为0.07～1.40 mg·kg^-1,坡茶村示范园有效硼含量最大,为1.4...     

蔬菜经纪人赵永宽

江苏省东台市东台镇蟒河村村民种蔬菜开始于上世纪90年代前期，当时一家一户种植的蔬菜都是自己送市场，交通不便，路途又远，费工费力。遇到市场行情不好，只能眼睁睁地看着蔬菜烂在田里。菜农们为此很伤脑筋，这时赵永宽从外面打工回来，他在苏南打过工，见识广。脑子活，当起了蔬菜经纪人，他把村里一家一户种植的蔬菜收集起来，推向市场，取得了很好的经济效益。     

盆景断头桩速成造尖法

一件上乘盆景树桩必须具备舒根亮爪,盘根错节,桩头苍古伟岸、隽永雄奇,出枝做盘舒展而洒脱,收顶流畅自然,富于神韵。然而,不尽人意的断头树桩往往给盆景创作带来许许多多的麻烦……     

微生物饲料添加剂应用研究（七）——几种有益微生物在斜带石斑鱼健康养殖中的应用

向养殖水体中分别加入枯草芽孢杆菌、地衣芽孢杆菌、复合芽孢杆菌、硝化细菌和光合细菌进行斜带石斑鱼养殖试验.结果表明，有益微生物能降低养殖水体中的NH4^＋ -N、NO2^- -N浓度；稳定pH值；减少弧菌含量．且与对照组相比，试验组摄食旺盛．成活率高。     

番鸭"花肝病"的诊治

番鸭“花肝病”是一种临床上以软脚为主要病状,以肝、脾表面有多量灰白色坏死小点,肾脏肿大、出血、表面有黄色条斑为主要病变的一种新的急性烈性传染病。福建省先后在莆田、福清、福安、长乐等地发生,我市从2002年起也时有发生,2006年4月13日笔者又接诊1例,现将发病和诊治情况报告如下:1发病情况2006年4月1日本市专业户林某购进一批12日龄雏番鸭1200只,4月5日每只颈部皮下注射重组禽流感病毒灭活疫苗(H5N1亚型,R e-1株)0.5m L,5天后突然出现死亡,3天死亡46只之多。2临床症状患病番鸭表现精神沉郁、拥挤成堆、食欲下降、羽毛蓬松、无光泽,…     

Ⅰ型鸭肝炎病毒变异株的鉴定

鸭病毒性肝炎是雏鸭的一种高度致死性传染病,其特点是发病急、病程短、传播快、死亡率高,死亡鸭多呈角弓反张,其肝脏常有特征性的出血性病变.鸭肝炎病毒（duck hepatitis virus, DHV）是本病病原,目前归属于小RNA病毒科的未确定种,DHV分为Ⅰ型、Ⅱ型和Ⅲ型,其中Ⅰ型呈世界范围分布,Ⅱ型仅限于英国,Ⅲ型则限于美国.DHV还存在一类毒株,与Ⅰ型仅有部分血清学相关性,Sandhu等（1992）称之为Ⅰ型的变异株,命名为Ⅰa型。