蜂胶对NDV的灭活作用效果观察

本文通过鸡胚接种的方法就蜂胶乙醇浸出物对NDV的灭活作用进行了试验观察,结果表明常温下3分钟,含蜂胶乙醇浸出物0.1mg/ml的95%乙醇稀释液、含蜂胶乙醇浸出物10mg/ml的47.5%乙醇稀释液、含蜂胶乙醇浸出物10mg/ml的生理盐水稀释液;37℃3分钟,含蜂胶乙醇浸出物0.1mg/ml的95%乙醇稀释液、含蜂胶乙醇浸出物0.1mg/ml的47.5%乙醇稀释液、含蜂胶乙醇浸出物10mg/ml的生理盐水稀释液均对ND克隆-30具有完全灭活作用;常温下3分钟,1mg/ml的47.5%乙醇稀释液对ND克隆-30具有灭活作用。     

马铃薯的储藏要点

马铃薯富含维生素、蛋白质等营养物质,属无公害产品,是青海省重要的粮菜兼用作物和良好的饲料作物,又是重要的工业     

植物杀虫剂在储粮害虫防治中的应用概况和展望

介绍了近年来植物杀虫剂在储粮害虫防治中的应用概况,并对其未来研究开发方向问题进行了分析.     

An introduction to markers, quantitative trait loci (QTL) mapping and marker-assisted selection for crop improvement: The basic concepts

Recognizing the enormous potential of DNA markers in plant breeding, many agricultural research centers and plant breeding institutes have adopted the capacity for marker development and marker-assisted selection (MAS). However, due to rapid developments in marker technology, statistical methodology for identifying quantitative trait loci (QTLs) and the jargon used by molecular biologists, the utility of DNA markers in plant breeding may not be clearly understood by non-molecular biologists. This review provides an introduction to DNA markers and the concept of polymorphism, linkage analysis and map construction, the principles of QTL analysis and how markers may be applied in breeding programs using MAS. This review has been specifically written for readers who have only a basic knowledge of molecular biology and/or plant genetics. Its format is therefore ideal for conventional plant breeders, physiologists, pathologists, other plant scientists and students.     

农用地土壤污染风险管控标准延伸理解及其评价标准现状分析

在对中国现行土壤环境质量标准的制修订历程回顾基础上,本文对新颁布标准《土壤环境质量 农用地土壤污染风险管控标准（试行）》(GB 15618—2018)进行了研究,对其主要特征、标准值内涵及风险筛选值和管制值具体应用等进行了延伸阅读,对中国农用地土壤环境评价标准基本框架进行了分析,针对农用地土壤环境评价标准存在的主要问题提出了合理建议,以期为新颁布农用地标准宣贯、正确使用等提供资料,以服务于中国农用地土壤污染预防、风险筛选和污染农用地安全利用、修复和风险管控,为中国土壤污染防治科学研究与技术进步提供支撑。     

立筒仓局部环流熏蒸杀虫试验

利用粮堆局部处理机对立筒仓进行局部环流熏蒸试验，可有针对性地杀死局部害虫，节省用药量，降低能耗，减少储粮损失，提高经济效益。     

Homozygous transgenic rice lines expressing GNA with enhanced resistance to the rice sap-sucking pest Laodelphax striatellus

Homozygous transgenic rice lines expressing snowdrop lectin, Galanthus nivalis agglutinin (GNA), were investigated for resistance to the rice small brown planthopper (SBPH), Laodelphax striatellus, an important rice sap‐sucking pest causing yield losses and serving as vector for some important rice viruses. Insect bioassay results revealed that both the GNA‐expressing homozygous lines tested significantly inhibited SBPH by decreasing its survival, its overall fecundity and retarding development. This is the first report on homozygous transgenic rice lines expressing GNA conferring enhanced resistance to SBPH. This result suggests that transgenic rice expressing GNA will be useful in rice pest resistance breeding, as an alternative to conventional breeding for the control of SBPH, and potentially alleviating damage caused by the viruses it transmits.     

三管引射式污水曝气装置的研究

通过对现有曝气装置的分析比较,在双膜理论的基础上,设计了三管引射式曝气装置,研究了各因素对增氧性能的影响,建立了有关回归方程式。试验和回归结果显示,曝气装置的截面积比、进气量、曝气深度以及混合室和扩散器的型式等是影响曝气性能的几个主要因素,选择合适的截面积比可使曝气的动力效率达到某一最佳值,而增大进气量和曝气深度可明显提高动力效率,不同型式的混合室和扩散器对动力效率也有不同的影响。此外,还对该装置进行了污水处理试验,也取得了较好的结果。从而为污水处理提供了一种新型、高效的曝气装置。     

土壤盐渍化的监测和预报研究

本文采用田间观测和数值模拟相结合的方法，对改造后的重盐碱试验地的水盐动态连续三年进行了监测和预报研究。在田间，监测了地下水的水位和矿化度、土壤盐分和水分、降雨和农田蒸散量等参数，同时针对现场试验条件进行数值模拟。在土壤盐分输运模型中，考虑动水不动水概念和吸附作用，在解水分运动方程时采用了更合理的改进型Ｐｉｃａｒｄ迭代差分法。研究表明，在当前的自然因素和农耕活动中，试验地土壤中的盐分达到动态平衡，不