牡丹种间花粉粒形态差异性比较

利用扫描电子显微镜对三种牡丹不同品种的花粉形态进行了观察研究,报道了花粉形态特征和种闻差异,探讨了花粉形态特征在种间演化的分类学意义。结果表明,牡丹属牡丹组成熟花粉粒形态大小和外壁纹饰存在着种间差异。     

洋葱黄矮病防治技术

洋葱(葱头)是乌兰察布市主要露地蔬菜之一。其产品具有个形均匀、肉质细嫩、组织紧密、营养丰富、风味浓郁、耐贮耐运等特点，深受消费者欢迎，在国内外市场享有盛誉。但近年洋葱黄矮病呈现较重发生的态势，严重地影响到葱头品质和产量。因此，加强对该病的防治，是葱头生产急需解决的问题之一。为此，特介绍洋葱黄矮病的有关防治技术，供基层农技工作者和农民朋友参考。     

贵州矮杨梅资源考察

文章详细阐述了以下内容:1.矮杨梅在贵州的分布区。2.贵州矮杨梅集中连片分布地区的面积、密度、年产果量及雌雄株比。3.矮杨梅的生态环境。4.矮杨梅分布与煤矿分布的相关性。5.矮杨梅优尊单株简介。6.对资源的保护与利用的意见。     

四棱豆的良种选育研究

以常规栽培种K0014为对照，对选出的4个四棱豆良种进行了主要生物学特性记载和产量分析。结果表明：该4个良种均适合南充地区栽培，其中K009和K0010具高产，抗病特性；96-13具早熟，高产，抗病特性；96-14-1具矮生直立，抗病特性。     

On the Causes and Prevention Measures of Rice Black- streaked Dwarf Disease

当前,由灰飞虱传播的水稻黑条矮缩病呈加重趋势,严重威胁了水稻安全生产,必须加强防治.文章主要介绍了水稻黑条矮缩病的症状,对其传播途径和发病原因进行分析,重点从农业、药剂方面提出防治措施,对控制病害流行危害、保障水稻高产稳产具有重要意义.     

Molecular phylogenetic status of Siberian roe deer （Capreolus pygargus） based on mitochondrial cytochrome b from Jeju Island in Korea

In order to elucidate the genetic diversity and taxonomic status of Siberian roe deer （Capreolus pygar- gus） from the Korean peninsula, partial sequences of the mitochondrial cytochrome b gene were analyzed. We col- lected 57 roe deer samples from Mainland and Jeju Island between July 2004 and June 2009. A total of 50 sequences （1,070 bp） were obtained, and seven haplotypes were defined. Five haplotypes were found from Mainland, and two were discovered from Jeju Island. The genetic diver- sity was lower in the Jeju Island population than in the Mainland population. In addition, both the consensus neighbor-joining tree and maximum parsimony tree showed an identical topology between the Mainland and Jeju Island clades. Based on the results, two subspecies of the Korean roe deer were confirmed. Siberian roe deer in Jeju Island showed a distinct difference in the cytochrome b gene compared with other Siberian roe deer, being aunique native species inhabiting only Jeju Island in Korea. Because Siberian roe deer in Jeju Island can be classified at subspecies level, the new subspecies in Jeju was named Capreolus pygargus jejuensis in this study. For this new subspecies, reasonable conservation and management effort is needed in the future.     

南京市临江路跨城南河桥主桥型比选

本文对南京市临江路跨城南和桥梁上部结构进行了分析比选,旨在为工程建设与城市景观、经济指标之间选取最优方案。     

矮紫苞鸢尾分类地位的研究

本文通过对紫苞鸢尾和矮紫苞鸢尾的形态特征、分布范围、核型特点等进行比较研究,提出矮紫苞鸢尾应为一个独立种。