种子的

Through the diversity investigation of weed in large area of white clover seed production atMaming （1）In the seed production of white clover in large area, by the growing of white clover, the species and quantity of weed are increasing rapidly;（2） Because the growth speed of white clover is slower than other grass in the seeding year,the early field management is effect to prevent the fast growth of the weeds.

通过对农业部白三叶种子生产项目在云南省马龙县马鸣乡大面积生产中杂草的多样性调查，结果表明：（1）在白三叶种子大面积生产中，随着白三叶的生长，田间杂草的种类和数量逐步增加；（2）由于在白三叶播种当年其生长速度不快，因而在其生长前期应适时除杂，以防止杂草的迅速生长。

On the concept,structure,function and ecological elements of the business environment and the implementation of management of the core ideas and countermeasures of science-technology value chain innovation of crop seed were discussed.

现代种子科技价值链创新管理包含从技术创新源到大规模新品种产业化的全过程，是以种子科技价值链为基础的涉及多学科、多领域、多部门、多节点的典型的企业管理系统工程[1]。

The most significant variance lay in the 1000-seed-weight,followed by flag leaf length and inflorescence shape and then by distance between flag leaf and inflorescence with least in inflorescence length,plant form,leaf width and seed length.Meanwhile,morphological characteristics of D.glomerata have significant relationships: those with upright and constrictive inflorescences hav...

其中，种子千粒重变异最大；旗叶长度、花序形状次之；穗叶距、花药宽度、旗叶宽度等性状变异中等；而花序长度、株型、叶宽、种子长度变异最小。2鸭茅植物形态学特征间存在明显相关性，花序直立、紧缩的鸭茅，叶片窄长，茎秆粗壮，旗叶较长，雄性生殖器官发育良好，结种性能强；而花序下垂、开展的鸭茅则与之相反。3聚类分析表明，不同野生鸭茅种源可划分为3类，其中花序下垂种源聚于一类；而花序直立的种源分居另两类。4从形态学特征及相关农艺性状分析，花序直立的鸭茅更具开发利用潜力。

In the process, however, the thirsty aardvarks also sip up a few pit-like seeds, which they later deposit inside fertilizing manure.

然而在喝水的过程中，口渴的土豚也会吸出一些喜欢窖藏的种子，而这些种子之后会被排在丰饶的肥料里。

Working principle: It can separate seeds from other inclusions according to their different physical and mechanical performance.

工作原理：种子精选机的工作原理是利用种子和其它夹杂物的物理机械性能的不同来进行的。

Botany, a 14th-century lotus seed was recovered from an ancient lakebed in China, becoming the oldest germinated seed on record. Nelumbo

志，&中国一颗十四世纪的荷花种子已经重新获得生命力来自远古的湖底，适当的这古老的种子发芽在报告上&。

BACKGROUND: Research on seed cells is the most important aspect in the filed of tissue-engineering research, and because of their various ad vantages, bone marrow mesenchymal stem cells have been taken as the ideal bone tissue-engineering seed cells.

背景：种子细胞的研究是组织工程众多研究领域中最重要的基础环节，骨髓基质干细胞以其诸多优点，成为理想的骨组织工程的种子细胞。

Sepals 4; stems densely villous-hairy or rarely puberulous; pedicels 1-10 mm; seeds free, with inflated raphe equal in size to body of seed; pollen in tetrads.

萼片4；茎密被长柔毛有毛的或很少被微柔毛；花梗1-10毫米；种子免费，膨大的具大小相等在身体的种子；在四分体里的花粉。

Importantly, ovules that contain developing seeds need to be free of wasp offspring because they eat the seeds.

更重要的是，胚珠包含发展中国家的种子必须免费蜂的后代，因为他们吃的种子。

With the seeds of artificially cultivated 2-year-old A. heterophyllum as tested materials, the cells in metaphase in the seeds were made for observation, statistic and karyotype analysis, and based on the 2 main features of length ratio and arm ratio of chromosome, the karyotypes were classified according to the criteria of Stebbins.

方法］以人工栽培的2年生异叶天南星种子为试材，观察种子中的中期分裂相细胞并对其进行统计和核型分析，其核型分类根据核型中染色体的长度比和臂比2项主要特征，按Stebbins的标准进行划分。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。