甘蔗不同熟期品种合理搭配与提高蔗糖分的关系

根据甘蔗不同熟期品种蔗糖分积累变化和高糖期出现迟早存在差异的特点，应用其积累动态模拟模型，探讨不同品种塔配形式与提高蔗糖分的关系，从理论上阐明早、中、晚熟品种合理搭配对延长高糖期和提高蔗糖分的作用，并给出品种搭配的求算原则和方法。为糖厂确定不同熟期品种的种植比例，提高经济效率提供指导依据。     

新疆枸杞与气象服务

枸杞(LyciumL.)在植物学分类学上属被子植物门,双子叶植物纲,茄科、茄族、枸杞亚族,枸杞属多年落叶灌木。枸杞始载于《神农本草经》,在《本草纲目》中,以枸杞名列为本经上品。枸杞的成分丰富,果、果柄和叶都含有多种有机物质和营养成分,它既是名贵的中药材,又是很好的滋补品。枸杞果实是补益治虚良药,在《本草备要》中指出,枸杞有“润肺、清肝、滋肾、益气、生精、助阳、补虚劳、强筋骨、祛风、明目”等作用。枸杞根皮,气味苦寒,有“能泻肝肾虚热,能凉血而补正气,治五内邪热,吐血尿血,咳嗽消渴,外治肌热虚汗,上除头风痛,中平胸肋痛,下利大…     

整顿规范地图市场秩序、促进地图市场健康发展

改革开放以来,我省地图市场发展十分迅速,社会各方面对地图的需求越来越来大,每年公开版地图品种近百种,印数近200万张(册),地图产品已由纸质地图向电子地图、数字地图、多媒体地图、网上地图等多种载体形式发展,附有地图图形的文化用品、工艺品、纪念品、玩具等产品大量涌现,各种报刊、影视、广告、标牌、展览使用地图图形的频率也越来越高。地图以其庄重、直观、易读的特点,在经济和社会各个方面发挥着重要作用。但是,随着地图市场的繁荣和发展,各种问题也不断产生,有的甚至相当严重,一些损害我国领土主权、民族尊严和版图完整、带有严重…     

农气观测的几种方法

农业气象观测质量的高低 ,决定着气象服务的效果。要提高农气观测内在质量必须注意以下几个方面。1　观测地段与作物品种的选定　　 ( 1 )观测地段必须有代表性。能代表当地地形、地势、气候、土壤和产量水平及主要耕作制度。( 2 )地段应距林缘、建筑物、道路和水塘 2 0ｍ以上     

CAD平台软件正版化之详析

对目前我国CAD平台软件正版化的现状及发展进行了较为详细的分析及探讨,对软件正版化的认识进行了阶段划分,并提供了实施CAD平台软件正版化的解决方案。     

Metabolism of polychaete Neanthes japonica Izuka： relations to temperature, salinity and body weight

Polychaete Neanthes japonica is a species geographically specific in China and Japan with important scientific implication and commercial value. In this study, the relations of body weight, salinity and temperature to oxygen consumption and ammonia excretion of N. japonica were determined. Three different groups in body weight (large: 2.34±0.36 g, middle: 1.50±0.21 g and small: 0.62±0.12 g) were set for all experiments. Results show that the body weight is negatively related to the rates of oxygen consumption and ammonia excretion; and the relationship is significant. The oxygen consumption and ammonia excretion at 24°C decreased at salinity from 5 to 30 and increased above 30, indicating that both lower and higher salinity are adverse and certain degree of salinity stress is necessary for enhancing the energy demand. At salinity 30, rising temperature from 18°C to 30°C, the oxygen consumption increased before 27°C and then decreased. However, the relation of ammonia excretion and temperature seems more complex. Two-way ANOVA shows that salinity, temperature and body weight all have a significant effect on the oxygen consumption and ammonia excretion of the worm. Moreover, interaction between salinity/temperature and body weight is also significant. O:N (oxygen/nitrogen) ratio varies greatly in this case from 5.97 to 463.22, indicating that N. japonica can regulate the type of metabolic substrate against environment changes. Supported by the National Natural Science Foundation of China (No. 30490233) and the Three-Gorge Project and the Estuarine Environment (No. SX2004-018) from the Three Gorges Project Construction Committee     

Are the fish of the upper and lower Mekong interconnected？

The Mekong supports one of the richest inland fisheries in the world, with many of the fish migrating long distance to spawn. Little is known about the fisheries and migration strategies of the Upper Mekong whilst it is supposed that many fish species move between the Lower and Upper Mekong. Most likely, natural fish migration in the river has been altered by dam construction across the mainstream of the Upper Mekong. In this paper, the interconnectivity of fish species between different sections of the Mekong and negative impacts of dams on migratory fish are studied. Of the 162 fish species in the Upper Mekong and the 869 species in the Lower Mekong, 61 species are common. Results show that there is no significant difference at order level between the UM and LM. Similarity coefficients are used to evaluate interconnectivity at species, genus and family levels among four different sections of the Upper Mekong with each other and with the Lower Mekong as a whole. The highest similarity is found between the middle and lower reach of the Upper Mekong at species and genus levels and the middle and upper reach at family level. Of the eight cascade dams, Mengsong Dam in planning is considered as the biggest threat to migratory fish from the Lower Mekong and should be particularly concerned. Supported by National Natural Science Foundation of China (No. 40601096)     

吊坠的配色技巧

吊坠的佩戴尤其要注重同服装相搭配。只要掌握好了配色技巧,就可以自成一家,在中坠的佩戴上达到一个新的更高境界。下面教你几款吊坠的搭配方法：