茎

This paper discussed the pathogens, disease regularity and prevention countermeasures of maize stalk rot, and elucidated that the infection mechanism of maize stalk rot is primary infection source of Pythium spp under high temperature.

论述了玉米茎腐病的优势病原菌、发病规律及其防治对策，阐明了玉米茎腐病的侵染机制是腐霉菌在高温条件下主要的初侵染原，而镰刀菌因其超强的定殖能力而进行二次侵染，两种病原菌侵染致病的主要活性物质为糖蛋白毒素。

Root-shoot ratio of ramet population with low herbaceous coverage was significantly higher than that with high herbaceous coverage.

荒草坡积雪草拥有更大的根干重和花果干重，但一级匍匐茎节间长和总匍匐茎节间长较短。

The critical nitrogen content in heading period was used to calculate the biggest accumulation quantity of nitrogen. The latent distribution index of leaf and stem, which was the variety heredity parameter, were used to distinguish the difference in nitrogen assignment in different varieties. The dynamic content of the nitrogen accumulation before anthesis could be described with a Richards model. The dynamic content of the nitrogen remobilization in leaf with leaf area index could be described with a power model, and the nitrogen absorption of grain from soil with dry weight could be described with a power model. The dynamic content of nitrogen density in stem and spike with physiological development time could be described with a nonlinear model.

模型利用抽穗期植株临界含氮量来表达氮素最大积累量，引入叶片潜在分配指数和茎鞘潜在分配指数2个品种遗传参数来区别不同品种在器官间的氮素分配差异，采用Richards方程来描述大麦花前氮素积累动态变化；采用指数函数方程来描述叶片氮的转移量随叶面积指数的动态变化以及籽粒从土壤中吸收的氮量随干物重的动态变化；采用非线性函数方程描述茎鞘和穗部的氮浓度随生理发育时间的动态变化。

Leaf apex rounded, obtuse, or rarely retuse.

植株丛生或者根状茎，匍匐茎无；圆锥花序开阔的的在花后 6

Petiole to 0.4 cm wide; rhizome usually without conspicuous internodes, or plants not rhizomatous.

叶柄到0.4厘米宽；根状茎通常没有明显节间，或植株不根状茎。

Stem soft, few to many branched, rhizomatous.

茎软，少数到多数分枝，根状茎。

Petiole to 0.4 cm wide; apical internodes of rhizome inconspicuous, or plants not rhizomatous.

叶柄到0.4厘米宽；顶端根状茎节间不明显，或植株不根状茎。

Plants forming thick ropelike stolons 1-12 cm with fleshy terminal bud; robust stems 40-120(-200) cm tall; capsules 7-11 cm.

植株形成厚绳状匍匐茎1-12厘米具肉质的顶芽；粗壮的茎40-120(-200)厘米高；蒴果7-11 厘米 14 E。

Stems (8-)10-30 cm; leaves never rosulate; inflorescences shorter than stems.

茎(8-)10-30厘米；从未的叶莲座状；花序短于茎。

Lianas or sarmentose shrubs, stolon bearing when pruned, to 4.5 m tall, glabrous except for corolla, latex clear or yellowish.

藤本植物或者具长匐茎灌木，匍匐茎忍受什么时候给4.5米高，无毛除了花冠，清楚和淡黄的橡胶删节。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。