开拓创新锐意进取办好省级农业科技期刊——《广西农业科学》办刊实践

为了适应农业科研和生产发展的需要，《广西农业科学》编辑部在近年的办刊实践中积极探索，开拓创新，通过调整刊物定位向学术性期刊转变，增加版面和改进编辑流程缩短文章出版时滞，拓宽报道范围扩大影响力，加强与同行的交流学习，提升办刊理念，实行文稿校核质量控制体系，保证刊物质量，强化编辑队伍建设提高编辑人员业务素质，加强期刊经营增强期刊社经济实力等措施，使期刊的内外质量不断提高，社会效益和经济效益显著增强，期刊进入良性发展阶段。     

农业信息：传统与现代的耦合

近年来，国家投资建设大量信息基础设施，以保证农业信息能更好的被农户采用。而现实中，农户并不通过网络、电视和报刊等现代信息手段获得农业信息，相反，基于地缘和血缘的熟人网络和以盈利为目的的商人成了农业信息传播的主要媒介。在这种传播方式下，农户的利益常遭侵害，农业科技难以广泛有效的传播，甚至一些假信息让农户失去了对“科技”的信赖。针对目前存在的种种问题，笔者兼顾现实与未来，提出了相关对策。     

甲苯侧链催化氯化产物分布的研究

研究了催化氯化的产物分布，试验了有关条件对产物分布的影响。结果表明：氯化程度是产物分布的主要影响因素；温度的提高，有利于苄叉二氯和苄川三氯的生成；铁离子、低温及水会导致环上的氯化；水引起水解的发生。     

Influence of Low Light Irradiance on Grain Filling in Rice (Oryza saliva L.) cultivars

Time course of grain filling pattern in two rice (Oryza sativa L.) cultivars, grown under normal and low light intensities, was studied. The number of spikelets, partially filled grains and high density grains were monitored at a 5 day interval during grain filling period from uniform panicles tagged at anthesis. The low light tolerant cultivar Swarnaprabha had more high density grains and less partially filled grains throughout the grain filling period and at harvest compared to cultivar Ratna under both normal and low light intensities. Further, the opening of spikelets in two flushes in Swarnaprabha seemed to result in a more efficient resource allocation and hence better yield as compared to Ratna, in which the opening of spikelets was in a single flush on day 10.     

免征农业税对农用土地的影响

为了明确免征农业税与农用地利用的关系,采用文献资料法和归纳分析法研究免征农业税对农用土地的影响———改变土地税收结构和农用土地收益分配结构。免征农业税将打开农用土地利用的新局面,对于农用土地使用权流转、资源优化配置、农用土地经营规模、保护耕地等都将产生积极的作用。     

宿根花卉的特点及其在园林中的配置

根据宿根花卉种类繁多、色彩丰富、生长稳定、抗逆性强的特点,其在园林中的配置,宜于建花坛、花境,也可群植,与背景树相结合,还可作地被植物代替草坪,也可建单类花卉园.     

Reproductive roles predict sexual dimorphism in internal and external morphology of lake whitefish,Coregonus clupeaformis

Abstract – The different reproductive roles of the sexes can predict the direction and magnitude of sexual dimorphism of external and internal morphology. Males should have enlarged structures that enhance the acquisition of mating opportunities, whereas females are predicted to have enlarged organs that are associated with the production of eggs. We tested these predictions in male and female lake whitefish, a species in which both sexes have similar overall body size and shape. After controlling for body size, male lake whitefish had significantly longer jaws and pectoral and pelvic fins, larger hearts, and more muscle than females. Sexual dimorphism in relative muscle mass may be one of the most fundamental morphological differences between males and females. Females had relatively heavier livers than males. Because the liver is important for the breakdown of fats and vitellogenesis, selection should favour an enlarged liver in females for the processing of energy and the production of large numbers of eggs.     

呼伦贝尔市农业结构调整最优方案

根据不同区域气候特点和产量水平,运用系统工程理论中的线性规划方法对该市的作物种植结构进行了调整,在种植面积基本不变的情况下,净产值增加了15.3%和17.3%;并在不同的气候区域设计了不同作物种植的最佳组合方案。这对增加农业种植效益和农民收入,有效改善生态环境,保持农业的可持续发展等方面都具有显著的经济、社会和生态效益。     

农业土地规模经营的理论探讨

实现农业土地规模经营,有利于生产力有效运转并取得最佳的规模效益。其适度性受各种因素的影响,具有区域性和动态性。规模经营与劳动生产率有着密切的关系,应该在确保提高土地生产率的基础上来提高劳动生产和土地规模经营的效益。土地适当集中、土地经营主体的总人数尽量精简和劳动组合的优化是优化土地经营规模的三个相互制约的因素。要采取积极的措施逐步实现土地的规模经营。对现有土地经营形式要做具体分析,其调整应从有利于生产力发展出发,在尊重群众意愿的基础上稳步进行。     

城市园林绿化现存问题、对策及其绿化植物配置原则

随着国民经济的不断发展，城市园林绿化已成为现代建设的重要内容。在归结上前城市园林绿化所存共性问题的基础上，针对城市园林绿化普遍存在的4方面问题，提出5点对策。