转基因水稻“竹转68”病害发生风险的初步研究

采用抗病性鉴定和田间隔离小区试验病害调查相结合的方法，研究了转抗真菌基因“RC24”的转基因水稻“竹转68”的抗病性和病害发生规律，对“竹转68”田间释放后病害发生的风险进行了初步预测。试验结果表明，“竹转68”对纹枯病具有较高的抗病性，对稻瘟病的抗病性也有显著提高且存在田间抗病性。进一步的田间隔离小区试验结果表明“竹转68”田间释放后，病害发生轻，表现较好的综合抗病能力。     

济南东部大辛河渗漏段地下水示踪试验与分析

2013年以来,济南市为正确处理好保泉和市民饮用优质地下水的关系,组织实施了地表水转换地下水补源系列工程,旨在补源保泉的前提下开采地下水。大辛河地表水转地下水工程是其中重要的组成部分,为了查明大辛河渗漏补源后地下水的补给方向、径流速度等,在大辛河主要渗漏段开展了地下水示踪试验。结果显示:地下水渗漏补源后沿渗漏段—龙奥大厦—济南东区供水奥体加压站—贤文小区一线大体自南向北径流,视径流速度约45m/d,越往两侧流速越缓慢,表明大辛河地表水转地下水工程主要对东郊水源地进行补给,对市区四大泉群补给较弱。示踪试验得出的结论,对大辛河地表水转地下水工程运行具有重要指导作用,对后期管理部门合理规划补源、开采布局具有重要的借鉴意义,促进济南保泉和供水的有机统一。     

江宁县"十五"期间矿产资源开发战略与对策

江宁县是江苏少数几个矿产资源大县之一." 九五"期间全县已发现的矿产达38种,已利用的为20种,矿业已成为全县经济的重要支柱. 总结了江宁县矿业开发的主要特点以及制约矿业发展的若干因素,其中资金、体制以及缺乏整体开发规划已成为阻碍江宁县矿业发展的主要原因.分析了"十五"期间矿产资源的利用前景,提出了建立3个工业基地、4个矿业小区的主要对策和措施以加速推进江宁县的矿业发展.     

在全省"规范宅基地管理、破解农民 建房难"工作现场会上的讲话

今天,我们在龙游县召开全省"规范宅基地管理、破解农民建房难"工作现场会,得到了衢州市委、市政府和龙游县委、县政府的高度重视和支持.上午,我们考察了龙游的晨东小区、翠竹小区、社里村、新槽村;刚才,我们观看了龙游县宅基地管理工作专题片,深感震撼;杜世源市长、刘根宏县长分别向我们介绍了衢州和龙游的宅基地管理工作,很受启发;德清县、义乌市、云和县分别从规划管控、模式创新、民主管理、制度改革等不同方面作了经验介绍,讲得都很好,值得各地学习借鉴.其中义乌是国家农村土地制度改革试点,其思路和经验对各地也有很好的启发性.希望大家认真学习借鉴这些好的经验和做法,进一步推进宅基地管理和农民建房工作.下面,讲三点意见.     

农民欢迎这样的"住宅革命"

"如果再给我一次选择的机会,我一定会选择‘套房’"!4月底,浙江台州市路桥区,一个村民这样表述了他眼中"立地房"与"套房"(公寓)的区别.路桥推行的"立改套"政策,群众态度从怀疑、反对,信任与支持的变化,在于这项政策,给了他们实实在在的好处.路桥区统一规划建设的农民套式安置小区,不仅彻底改变农村"室内现代化,室外脏乱差"现象,还由此实现了土地高效集约化利用,探索出了一条社会主义新农村建设的新路子.     

让"粮田"变"良田" ——邓州市推进耕地数量、质量、生态"三位一体"保护

春分前后,走进邓州市孟楼镇国家杂交小麦种植基地,绿油油的麦苗长势喜人,村民正在田间地头紧张地忙碌着. "邓州市有253万亩耕地,是我国永久基本农田保护建设示范区、粮食核心主产区,做好耕地保护工作尤为重要."邓州市自然资源和规划局相关负责人说.     

流动的“红马甲”

正"非常时期,为了大家的健康,请尽量减少外出;外出时要戴好口罩,不到人流密集区活动。"连日来,在河南省民权县第一公馆小区,来自该县自然资源局的志愿者身穿"红马甲",手持小喇叭,不间断地向小区居民宣讲着疫情防控事项。据了解,第一公馆小区居住有1700余户、近万名居民。疫情发生后,该局决定组织志愿者投入防控一线,在该小区门口设立志愿者服务站,宣传防     

甘蔗黄点病发病规律调查

调查了不同甘蔗品种、施肥水平、蔗田地势及气体条件下,甘蔗黄点病的发生情况,结果表明,甘蔗品种间对黄点病的抗（感）病性显著差异,Ｒｏｅ部分品种较感病,其中Ｒｏｃ１０最感病,７０／１７７,７１／２１０、９３／２９３及果蔗等品种（系）较抗病。氮中加重黄点病发生,钾肥可减轻黄点病发生,蔗田地势低洼、易积水、病害发生严重,温度适宜、天气长期阴雨、田间湿度大,有利于黄点病发生;在此条件下若遇台风垄击,黄点病可     

甘蔗黄点病发病规律调查

调查了不同甘蔗品种、施肥水平、蔗田地势及气候条件下,甘蔗黄点病的发生情况。结果表明,甘蔗品种间对黄点病的抗（感）病性存在显著差异,Ｒｏｃ部分品种较感病,其中Ｒｃｏ１０最感病;７９／１７７、７１／２１０、９３／２９３及果蔗等品种（系）较抗病．氮肥可加重黄点病发生,钾肥可减轻黄点病发生。蔗田地势低洼、易积水,病害发生严重．温度适宜、天气长期阴雨、田间湿度大,有利于黄点病发生;在此条件下,若遇台风袭击,黄点病可能大流行．     

趁"热"解纠纷

"丁零零、丁零零……"一阵急促的电话铃声 从宜阳县城关国土资源所办公室传了出来.所长王宏卿拿起电话,对方大声喊道:"喂,王所长吗?我是城关乡后庄村土地协管员老徐,我们村子发生了宅基地纠纷,你赶快过来处理一下吧!"还没等老徐把话说完,王所长急忙放下电话,带领执法人员赶往后庄村.     

C_(17)-fengycin B,produced by deep-sea-derived Bacillus subtilis,possessing a strong antifungal activity against Fusarium solani

Root rot disease caused by Fusarium solani is the most devastating disease of the tomato and legume crops in China.The metabolites of Bacillus species can inhibit many fungal diseases.In this study,the metabolites of deep-sea-derived bacterium Bacillus subtilis 2 H11 can significantly inhibit the growth of F.solani.The metabolite C_(17)-fengycin B,one of the cyclic lipopeptides,was identified by the combination of silica column chromatography,high-performance liquid chromatography(HPLC),high-energy collision induced dissociation mass spectrometry(HCD-MS) and tandem mass spectrometry(HCD-MS/MS).The results of scanning electron microscopy(SEM) and transmission electron microscopy(TEM) showed that C_(17)-fengycin B could destroy the structure of the hyphae and spores of F.solani.The antifungal activities of C_(17)-fengycin B against F.solani were tested at concentrations ranging from 0.05 mg/mL to 0.20 mg/mL.The results indicated that C_(17)-fengycin B inhibited the growth of F.solani with antifungal index of 89.80%at 0.20 mg/mL,and the antifungal activity of C_(17)-fengycin B was further verified by the pot experiment.In addition,the cytotoxicity experiment showed that C_(17)-fengycin B had good biocompatibility and was a potential candidate for the development of biocontrol pesticide in the future.     

The mycobiota of discoloured needles of the Swiss stone pine (<Emphasis Type="Italic">Pinus cembra</Emphasis> L.) in the Tatra Mountains (Poland)

The Swiss stone Pine (Pinus cembra L.) is an alpine species, fairly commonly occurring in the Alps and the Carpathians, close to the timberline. Natural sites of the Swiss stone pine in Poland are found exclusively in the Tatra Mountains, within the area of the Tatra National Park (TNP). In 2017, the health status of the needles of P. cembra was determined and their mycological analysis was carried out. As a result, 11 species of fungi were isolated from the needles showing disease symptoms, manifested by various shades of discoloration. The most frequently observed species was Fusarium oxysporum. It probably does not bring on disease symptoms, but may affect the development of other frequently isolated species (such as Sydowia polyspora, Lophodermium sp. and Lophodermium conigenum) that are pathogenic to Pinus spp.     

《海国图志》的地图学价值与现实意义

中国近代史上开眼看世界第一书《四洲志》的主编林则徐,亲自命名并委托魏源担任主编完成的《海国图志》,于1842-1852年连续3次出版,迅速传到日本并被争相购买,而在中国却被皇宫束之高阁。直至1978年中国实施改革开放,史地学界开始了研究《海国图志》的热潮,并高度评价其为“最完备的介绍世界历史地理的鸿篇巨著”、“中国近代第一本自编世界地图集”等。为了探索《海国图志》的成功秘诀,本文首先分析了《海国图志》100卷版内容构成,概括了《海国图志》发表后在中国与日本的不同反响;接着,重点探讨了《海图图志》的“设计思想、内容编排、编纂技术”等方面的地图学价值,以及”师夷长技以制夷”的编辑策略,着重于资料真伪分辨和发挥综合体裁协同效果等成功经验;最后,呼吁当今地图工作者努力吸取《海国图志》的宝贵经验,尽快编纂出版一本“内容真实、大型综合、服务民众”的综合性世界地图集。     

“三个代表”重要思想与党的改革精神

探讨“三个代表”重要思想与党的改革精神之内在联系 ,从“三个代表”的高度发扬改革精神 ,以改革精神落实“三个代表” ,对于推进党的建设和建设小康社会意义重大。中国特色社会主义事业是改革的事业 ,党的改革事业与党的改革精神密切联系 ,而“三个代表”重要思想使改革精神全面升华 ;发展先进生产力、发展先进文化和实现人民根本利益要求发扬改革精神 ,改革精神是“三个代表”重要思想的时代特质 ;“三个代表”重要思想与改革精神统一于党的事业发展 ,二者的根本要求是一致的。要围绕发展第一要务 ,发扬改革精神 ,落实“三个代表”。     

“四全”服务模式下江苏省不动产登记服务网点的可达性

"全流程优化审批、全区域便民服务、全业务网上办理、全节点效能监管"的"四全"服务模式是江苏省国土资源系统落实国家简政放权、放管结合、优化服务要求的一项重要举措。其中"全区域便民服务"是打破原有行政界线,方便服务对象就近办理国土资源行政审批事项,为社会提供更为高效、便捷、优质的服务。本文在对江苏省不动产登记服务网点建设现状特征分析的基础上,结合全省道路网络和居民点数据,采用成本距离栅格分析方法,以出行时间距离代替空间距离,计算和分析了"四全"服务前后江苏省不动产登记服务网点的可达性。结果显示:江苏省不动产登记服务网点在地区分布上差异较大,但居民点到达服务网点的时间距离大部分集中在30 min以内,"四全"服务前江苏省不动产登记服务网点的平均可达性值为32.5 min,"四全"服务后平均可达性值缩短至29.0 min(提升10.8%)。"四全"服务的实施加剧了江苏省城市之间可达性的差异(扩大5.0%),即高可达性城市得到进一步巩固,而低可达性的城市提升幅度相对较小。     

基坑围护设计与实测分析比较

通过不同围护软件分析计算并与实测结果进行比较 ,指出土层水平抗力系数“m”取值的关键性 ,基坑开挖是一个动态而复杂的过程 ,理论计算会有一定的差距     

生态批评视野中的“一堆木柴”——罗伯特·弗罗斯特诗歌《一堆木柴》核心意象分析

实现人和自然和谐相处、共生同荣的美好理想,是弗罗斯特诗歌中重要的母题之一。从生态批评的角度,对弗罗斯特名诗《一堆木柴》进行细致分析,揭示了这堆木柴是一个生生不息、循环往复的生态体系,既是生态失衡、断裂的象征,又是生态再生、和谐的缩影。     

Field experiment of rainfall infiltration on a soil slope and simulations based on a water-air two-phase flow model

Rainfall infiltration on a soil slope is usually an unsaturated seepage process that can be described by a water-air two-phase flow model. The effect of pore air pressure on rainfall infiltration has been widely recognized and validated by means of numerical simulations and laboratory experiments. However, whether a slope can actually seal pore air continues to be debated by researchers. In this study, a water-air two-phase flow model is used to simulate the rainfall infiltration process on a soil slope, and a field experiment is conducted to realistically test the sealing conditions of a slope. According to the numerical simulation, the areas of water and air flow in and out on the slope surface are relatively stable and can be classified as the "inhalation zone" and "overflow zone", respectively. Intermittent rainfall on the soil slope has an amplifying effect on pore air pressure because rainfall intensity is usually at the millimeter level, and it causes pore air pressure to reach the cm level. A field experiment was performed to determine whether a slope can realistically seal pore air and subsequently verify the regularity of rainfall infiltration. Air pressure sensors were buried in the slope to monitor the pore air pressures during the rainfall process. The monitoring results show that the pore air pressure in the slope changed, which indicates that the slope can seal air. Moreover, the amplification effects of intermittent rainfall on pore air pressure were observed for natural rainfall, which agrees well with the numerical simulation results.     

Identification and categorization of climate change risks

The scientific evidence that climate is changing due to greenhouse gas emission is now incontestable, which may put many social, biological, and geophysical systems in the world at risk. In this paper, we first identified main risks induced from or aggravated by climate change. Then we categorized them applying a new risk categorization system brought forward by Renn in a framework of International Risk Governance Council. We proposed that ＂uncertainty＂ could be treated as the classification criteria. Based on this, we established a quantitative method with fuzzy set theory, in which ＂confidence＂ and ＂likelihood＂, the main quantitative terms for expressing uncertainties in IPCC, were used as the feature parameters to construct the fuzzy membership functions of four risk types. According to the maximum principle, most climate change risks identified were classified into the appropriate risk types. In the mean time, given that not all the quantitative terms are available, a qualitative approach was also adopted as a complementary classification method. Finally, we get the preliminary results of climate change risk categorization, which might iay the foundation for the future integrated risk management of climate change.     

“数字城市”及其关键技术

“数字地球”是一个可以嵌入海量地理数据的、多分辨率的、真实地球的三维表示。自美国前副总统戈尔提出“数字地球”概念以来 ,世界上许多国家都在探讨如何实施本国的“数字地球”战略 ,力争在当今科技制高点上占据一席之地。在实施“数字地球”战略时 ,作为地球表面人口、资源、环境、信息最密集的地区 ,城市必然成为主要切入点之一。“数字城市”研究是当前地理信息科学研究的一个热点。与“数字地球”不同 ,“数字城市”是在城市数字化基础上建立的一个能够实现城市综合管理与决策支持的、虚拟的、具有开放性的城市模型。