农作物病害流行程度划分标准的方法探讨

农作物病害流行程度划分标准是确定病害流行轻重的主要依据.在研究分析当前病害流行程度划分标准存在问题的基础上,提出病害流行程度划分标准应该由多项指标改为一项指标,分别以相应行政区域的加权病情指数或虫口密度来表示,并给出了其测算方法.同时提出行政区域范围的大小不同,病害流行程度分级标准的指标不同.行政区域小,分级指标值大;行政区域大,分级指标值小.从而解决了目前实际工作中病害流行程度分级标准不规范的问题.     

Growth standards for nine North American fish species

Abstract  Standard methods for comparing population characteristics within and among fish populations greatly enhance communications among fisheries scientists, improve the efficiency of data analysis, and provide insight that helps guide management actions. Although standard methods are available for comparing some fish population characteristics (e.g. length structure, body condition), similar methods are lacking for comparing growth. The purpose of this study was to provide standards (i.e. percentiles and a standard growth model) for nine ecologically and recreationally important fish species. Percentile distributions of mean back-calculated length at age were estimated using data obtained from the published literature and from data solicited from state and federal agencies throughout North America. Percentiles of growth were estimated for bluegill, Lepomis macrochirus Rafinesque, common carp, Cyprinus carpio Linnaeus, flathead catfish, Pylodictis olivaris (Rafinesque), largemouth bass, Micropterus salmoides (Lacepède), sauger, Sander canadensis (Griffith & Smith), smallmouth bass, Micropterus dolomieu Lacepède, white bass, Morone chrysops (Rafinesque) and yellow perch, Perca flavescens (Mitchill). Standard growth models (i.e. von Bertalanffy models) were developed for these species and for channel catfish, Ictalurus punctatus (Rafinesque). These results provide tools that will help scientists compare growth of fishes across North America.     

黑龙江八五七农场信息化研究

从硬件，软件和队伍建设3个方面介绍并分析了黑龙江八五七农场的信息化建设，并对未来的进一步发展提出了建议。     

Quality Control in Soil Testing using the Internal Standards: Temporal Variability in Organic Carbon and Extractable Nutrient Elements

Internal soil standards are used in an analytical laboratory as one of the tools for providing feedback on the quality of soil-testing service provided. The objective of this study is to provide results on the temporal variability in soil-test values of the internal soil standards used for soil organic carbon and extractable phosphorus (P), potassium, sulfur, boron, and zinc determination in our analytical service laboratory. The range, mean, standard deviation, and coefficient of variation values for the internal standards for various fertility parameters varied according to the parameter and were generally of acceptable quality, except for the extractable P (Olsen P) in the lower range of extractable P. Our results show that the use of internal soil standards in an analytical service laboratory is a simple, inexpensive, and effective tool for providing feedback on the quality of soil-testing service.     

车辆保险理赔纠纷产生的成因及对策

文章通过对车险理赔纠纷产生原因的深入剖析,探讨了事故车辆修理费用和理赔金额之间产生差异的各种可能的原因,为正确处理车主与保险公司之间的关系,正确解决事故发生后的赔偿问题提供了方法上的指导。     

国内外储罐事故案例及储罐标准修改建议

系统阐述了国内外典型的储罐事故案例,包括英国邦斯菲尔德油库火灾爆炸事故、美国宾夕法尼亚州储罐开裂事故.英国政府针对邦斯菲尔德油库火灾爆炸事故的做法值得借鉴,如公开发布调查报告、设立网站共享经验教训以及限期完成整改措施等.深入研究了国内外典型储罐事故的经验教训,包括设备故障、制造缺陷、雷击、静电、明火、违规操作施工和电气火花短路等.针对我国储罐设计建设、运行管理和安全消防领域的技术标准,提出了改进建议.(参18)     

改进的原型进化法在建立县级森林资源管理信息系统中的应用

运用改进的原型进化法设计和开发通用的县级森林资源管理信息系统(general forest resource management information system for forest bureau on county-level,简称GFRMIS),并将该系统应用到广西壮族自治区武鸣县.GFRMIS具有通用性、标准规范性、地方兼容性、继承性和系统功能易于扩展维护等特点.改进的原型进化法不但能够延长软件的使用周期,而且可提高系统的实用性和扩展性,是一种较好的软件开发模式.     

巴西蜂业管理和蜂业标准

介绍了巴西养蜂业的管理、政府在蜂业发展规划方面所做的工作以及巴西蜂业标准,为读者更好地了解巴西蜂业提供参考。巴西蜂业由农牧与供应部管理,从业需要进行注册,产品经过认证后才能销售和出口。政府制定的“国家整合路线计划”包括了“蜂蜜路线”,投入资金予以支持。巴西蜂业标准共17个,分为生产标准和产品标准。     

OIE对食品安全关注与我国动物源性食品安全监管

本文详细讲述了近期OIE对动物源性食品安全的关注及采取的行动,并对我国动物产品安全监管提出了各项切实可行的措施.