芝麻资源核心收集品的建立

通过对预选出的８８４ 份芝麻资源核心收集品农艺性状的进一步鉴定核查和修正之后,采用离差平方和法分组进行系统聚类分析,依据决选核心收集品数量为预选核心品的５０％ 的原则、并考虑组间遗传多样性差异,随机挑选出４５３ 份核心资源,建立了中国芝麻资源核心收集品。对４５３ 份核心收集品代表性分析结果表明：核心资源的株型、花色等１０ 个非数值型性状共３５ 种表现型各占比例与预选核心品基本一致,含油量、千粒重等４ 个数量性状的均值,标准差等６ 个特征值与预选品相近     

加强宁夏农业技术推广服务体系建设与管理的探讨

农业技术推广对促进农业科技成果转化和技术进步,发展农业生产和农村经济具有十分重要的作用。文章针对宁夏回族自治区农业技术推广服务体系的发展现状作了全面客观的分析,特别对现行体系中不利于农业技术推广工作的问题进行了调查,剖析,在此基础上提出了加强本地区农业技术推广服务体系建设与管理办法,以引起各方面的重视,从而保证和推动宁夏农业技术推广服务体系的健康发展。     

天津盐碱土壤建植草坪的研究

随着人类环境与生态的要求,国内目前对草坪的需求与日俱增,天津市现有的人均绿地面积要经过长期不懈努力,才能达到发达国家城市建设的水平,如何在天津盐碱土壤上建植草坪生产基地,以优质的草坪草卷为最终商品加速绿地建设,使白天更快、更好地绿起来,是面临必须解决的重大研究课题。天津市地处渤海之滨,大部土壤盐渍化,园林绿化小面积建植草坪自可选择较优质的耕地,但在大面积的盐碱土壤上规模生产现代化草坪草卷,过去尚无成熟经验可供借鉴,我们依托天津红港绿茵公司５ ａ 中（１９９４～１９９９）在６６．７ ｈｍ ２盐碱土壤上建植草坪的实践,总结出在北方滨海地区盐碱土壤现代化草坪生产的经验及配套技术。     

冷季型草坪种子建植技术

冷季型草坪已成为现代园林绿化的重要组成部分。播种建坪因其具有省时省力．成坪速度快,均匀度好,适应性广,竞争力强,观赏效果好而被普遍采用。本文根据冷季型草种的生态习性,对其种子直播建坪的技术进行了探讨。     

仁用杏SSR反应体系的建立与优化

采用正交设计结合单因素分析,建立并优化了仁用杏SSR反应体系。结果表明:20μL反应体系中,Mg2+、Taq DNA聚合酶、dNTPs和引物的浓度分别为1.5 mmol/L1、.5 U、0.2mmol/L、0.25μmol/L,引物退火温度为52℃。应用该体系对24份仁用杏资源进行SSR分析,DNA谱带多态性丰富,将为仁用杏资源的SSR分析提供技术支持。     

Bioclimatic Matching Analysis for Epiblema strenuana (Lepidoptera:Tortricidae) in China

The phytophagous insect, Epiblema strenuana, is an effective biocontrol agent against Am-brosia and Parthenium, and was introduced to China in 1990 to control Ambrosia artemisiifolia. After asmall scale release in Hunan Province, E. strenuana established and begun to spread. Host specificity andfeeding studies in Hunan have indicated that there are four host plants in China, A. artemisiifolia, A. trifi-da, Xanthium sibiricum and Parthenium hysterophorus. These plants are all weeds that need to be con-trolled. However, there are still some different views among scientists about the merits of this release becauseof potential effects on non-target species such as Helianthus annuus, and uncertainty about climatic suitabili-ty. To address these concerns, the CLIMEX system was used to predict the possibility of establishment of E.strenuana with A. artemisii f olia , A. tri fida , and P. hysterophorus at 85 meteorological locations. Also,the probability of E. strenuana co-establishing with A. artemisiifolia, A. trifida or P. hysterophorus wasevaluated quantitatively by bioclimatic risk index (BCRI) transferred from ecoclimate index (EI). Moreover,the hypothetical adaptation of E. strenuana to H. annuus as a host, were evaluated by bioclimate matching.These results help to predict the potential spread of A. artemisiifolia, A. trifida, P. hysterophorus and e-valuate the merits of further releases of E. strenuana in China.     

The establishment rate of a sheep nematode: revisiting classics using a meta-analysis of 87 experiments

Strongyle nematode establishment rate in their host is a highly variable life history trait, which makes it difficult to estimate. A meta-analysis was applied to the nematode Teladorsagia circumcincta of sheep in order to acquire a general framework of the factors modulating this life trait. A linear model was built with individual data on 540 infected lambs extracted from 13 articles. Lambs breed and age, time lag between last infection and the interaction between infection mode, infective dose and the number of repeated infective doses were significantly related with the establishment rate. The influence of infection mode on nematode establishment rate was also evaluated by comparing nematode establishment rate distributions within lamb populations infected under different conditions. Natural and repeated experimental infections lead to similar distribution of establishment rate. Conversely, these infection conditions resulted in different parasite establishment rates in average (12.7 and 23.4%, respectively). Three hypotheses are discussed to explain this result: immune protective response, host avoidance behaviour and parasite virulence.     

双流县农牧110的建立与实践

为创新服务机制,强化服务职能,提高服务水平,体贴农民,关心农民,帮助农民,切实为农民办实事,在双流县委、县政府的关心支持下,成立了“双流县农牧110”。经过一段时间的宣传和运行,已得到了农民群众的认可,取得了初步的成效。本文从农牧110的建立、农牧110的运行、几点体会、努力方向等方面入手,介绍了农牧110从成立到现在的运行情况,具体做法和取得的主要成效。提出了农牧110今后的努力方向,要把农牧110建成为农民群众服务的民心工程,要以农牧110建设为契机,加快构建和完善农村服务体系,助推社会主义新农村建设。     

农产品质量安全“安丘模式”的创立与发展

农产品质量安全"安丘模式"是在出口农产品管理体系建设的基础上不断实践探索发展形成的。县域范围内,政府是农产品质量安全管理的承担者,方式方法要与市场经济相适应,需创新完善农业化学品供应、农产品检测、质量信息、技术标准、运行管理五个体系。提出了农产品质量安全"县长负责制"的发展方向。     

The establishment of standardization laboratory in formula fertiliTation by soil test

创建测土配方施肥标准化验室工作,对于提高化验室土壤肥料检测能力和管理水平具有重要意义。文章以灵川县土壤肥料工作站利用测土配方施肥项目支持,大力推进化验室建设,检测能力得到大幅度提升,获得省级计量认证和农业部标准化验室称号为例,探讨创建测土配方施肥标准化验室工作的思路和方法。