优势种

The principles of several DNA Molecular markers and their application on assessment of germplasm genetic diversity,fingerprinting construction,classification of heterotic groups and heterosis prediction for maize were reviewed.The present problems and prospective of molecular markers application in germplasm resource we...

介绍几种DNA分子标记的原理，综述了DNA分子标记在玉米种质遗传多样性鉴定、绘制指纹图谱、杂种优势类群划分和杂种优势预测等方面的应用，并探讨了在玉米种质研究中存在的问题和应用前景。

The amount of Ca8-P in soil with CRMP treatments was lower than that of CMP treatments. The changes of the amount of Al-P, O-P, Fe-P and Ca10-P in soil were neglectable during the course of experiment.3. The shoot and root weight of sorghum increased through application of phosphorus, in addition, The increase of sorghum shoot and root weight was greater than that of common monoammonium phosphate due to the slow release of nutrients from CRMP. The accumulative uptake of phosphorus in shoot and root with CRMP treatment was greater than that with CMP treatment in low (75 mg P2O5/kg soil ) and high（150mg P2O5/kg soil）rates, especially on middle stage, and in high phosphorus rate, this advantage was more obvious than that in low phosphorus rate.

磷肥的施入，促进了高粱地上部和根部的生长，而控释肥由于缓慢释放养分，与作物吸收相一致，更能促进高粱的地上部和根部干物质积累；对于高粱地上部及根部的磷素累积，在两种施磷水平下控释处理地上部及根部磷素累积量均大于非控释处理，尤其是在中期，而且高磷水平下优势更加明显，低磷控释处理的磷素累积量能达到高磷非控释的累积量，即减少一半的用量即能达到同样的效果；在氮、钾、钙、镁相同的水平下，控释处理比非控释处理更能促进地上部及根部氮、钾、钙、镁累积量，这种优势在中期表现最明显。4。

The number of autoterophic bacteria were significantly lower than the heterotrophic bacteria. Majority of 21 strains of heterotrophic bacteria that isolated from water body were Pseudomonas. Majority of 25 strains of heterotrophic bacteria isolated from sediment were bacillus, microccus and Pseudomonas.Three genus of autotrophic bacteria were sulphuret bacteria, nitrify bacteria and nitrosobacteria that were capable of oxidizing H2S, S, FeS, oxidizing NH3 to NO2 and NO2 to NO3 respectively.

试验稚鳖池水中共分离出21株异养细菌，其中优势菌为假单胞杆菌属细菌；底泥中共分离出25株异养细菌，其中优势菌为芽胞杆菌属细菌，微球菌属细菌假单胞菌属细菌，三种自养细菌分别为具有氧化硫化氢、元素硫或硫化亚铁的硫细菌；具有氧化氨为亚硝酸的亚硝化细菌和能将亚硝酸进一步转化成硝酸的硝化细菌。

The advantage plant communities were Setaria viridis community, Setaria viridis + Amaranthus spinosus community, Sesamum indicum community and Cynodon dactylon community that mainly distributed within an altitude range of 156-150 m above sea level.

结果］三峡库区消落带植物约16科27种，种类最多的科为禾本科和菊科，优势种群为狗尾草、刺苋、芝麻和狗牙根，优势植物群落为狗尾草草丛、狗尾草＋刺苋草丛、芝麻草丛、狗牙根草丛，主要分布在水位156~150 m消落带。

It is necessary to convert plenty of pine sources into economy advantage, and develop a kind of unprecious metal catalyst substituting for Palladium.

目前，松香歧化反应用最理想的催化剂是Pd/C催化剂，但贵金属Pd在地壳中含量少，价格贵，而我国钯主要依靠进口，要把云南省丰富的松林资源优势转化为经济优势，研究开发一种可以替代Pd的非贵金属催化剂具有重要的意义。

The combined production of vertical and horizontal wells can make horizontal well production rates be 2 to 5 times greater than unstimulated vertical well rates, but the areal sweep efficiency is less than that of vertical well pattern untill when the perforation ratio is greater then a certain value, which depends on the pattern of the combination. Seven spot pattern of the combination of vertical and horizontal wells has some advantages over others.

当水平井和直井联合面积布井时，在同样的压差下，水平井的产量要高于相应直井井网的直井产量的2～5倍，但只有当穿透比达到一定程度，或水平井达到一定长度时，其波及系数才高于相应直井井网的波及系数（五点法井网的穿透比界限为0.521，七点法井网的穿透比界限为0.430），因而在水平井开发油气田时，必须保证水平井一定的长度，这样从长远的观点，水平井才能显示出优势，对比性分析表明，水平井和直井的七点法联合布井和直井井网以及水平井和直井的五点法联合布井井网相比，具有一定的优势，数值模拟表明，在水平井和直井的联合面积布井的各种方式中，改进的九点井网是一种较好可取的布井方式。

Is one of the most important vegetable crops, it shows remarkable heterosis, producing hybrid seed using Cytoplasmic Male Sterile line as female parent is a very important way to utilize the heterosis in radish.

是一种非常重要的蔬菜作物，其具有明显的杂种优势，以细胞质雄性不育系为母本，实行三系配套的制种方式是萝卜杂种优势利用的重要途径。

The unique geography and climatic conditions have accomplished Luzhou liquor unique qualities with unduplicated and irreplaceable advantages ; as a result of being a typical representative Liquor City with rich fragrance like Luzhou Laojiao and Maotai-flavor style liquors such as Lang Liquor.

最具竞争优势和发展潜力的酿酒业独特的地理、气候条件，造就了泸州美酒的独特品质，形成了泸州酒独一无二、不可复制与替代的优势，使泸州成为全国唯一拥有浓香型、酱香型两种白酒典型代表的城市。

The article is being compared, analytic quality function spreads out and experiment design on the foundation of these two kinds of methods, advanced the design idea of will both compositive application, built both compositive model, this utmost ground produces respective advantage, make up for inadequacy, achieved the quality competition advantage of company product thereby.

文章在比较、分析质量功能展开和试验设计这两种方法的基础上，提出了将两者集成应用的设计思想，并建立了两者的集成模型，这最大限度地发挥各自的优势，弥补不足，从而实现了企业产品的质量竞争优势。

With the advantage of its own machinery production, integration technology of mechanism, electrics and hydraulics and its alliance with Materials Science and Engineering Research in authoritative research institutions, Haiyuan successfully developed HF Series Automatic Hydraulic Wall Brick Press and matching production lines in 2003, which breaks through the technology bottleneck in more efficient utilization of solid waste and massive production of high-quality new wall materials, and provides a kind of technology and full sets of equipments with low-investment, high efficiency and ease of a large-scale application for the development of recycling economy and a conservation-oriented society.

它利用自身机械生产及机电液一体化优势技术，联合权威科研院校材料科学与工程研究的优势，于2003年研发成功HF系列墙体砖全自动液压压机及配套生产线，突破了多品种固体废弃物高效利用、规模化生产高品质新型墙体材料的技术瓶颈，为市场提供一种低投入、高效益、便于大规模推广应用的工艺技术与成套装备，为发展循环经济、建设节约型社会奠定基础。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。