节间的

Five main stalk crops planted in northern China including wheat, corn, broomcorn, soybean, and millet, were chosen to be the samples of the experiments. About seven morphological traits (such as plant height, ear length, ear weight, moisture content and so on) were measured in the crop mature period. The maximum shear force during shearing process, through static test equipment, at the second internode of the basal stalk, was recorded. And shear strength of each crop was calculated to find the differences of shear strength among different crops. The optimal regression models of shear force and morphological traits were obtained by multiple linear regression method with Statistics Analysis System. The equation based on the regression models was constructed.

本文以北方主要茎秆作物（小麦、玉米、高粱、大豆、谷子）为研究对象，试验测定了成熟期茎秆基部第二节间的最大剪切力及株高、穗长、穗重、含水率等七种形态特性指标，获得了静载情况下相关样本的剪切强度；分析比较了不同茎秆作物剪切强度的差异性，并利用SAS软件对茎秆作物剪切力与形态特性指标进行了多元线性回归，得到了剪切强度对形态特性指标的最优回归方程。

Culm sheaths shorter than internodes, to 14 cm, glabrous, apex papery and undulate when dry.

节间的竿箨短于，令14厘米的是，无毛，似纸的顶和干燥时波动。

Young culm internodes thinly white powdery, sparsely deciduously white hairy; culm sheath blade abaxially glabrous.

稀少，稀疏白色敷粉的节间的年轻秆白色有毛；竿箨叶片背面无毛。 58 B。 intermedia 绵竹

Spikelets 3–6, 4–7 cm, glaucous, pedicels hairy; florets 8–13; rachilla internodes 4–5 mm. Glumes 3–5, enlarged upward; lemma ovate-lanceolate; palea longer than lemma, rarely equal in length, ciliate, glaucous and slightly hairy between keels, apex acute.

小穗3-6，4-7厘米，有白霜，花梗有毛；小花8-13；小穗轴节间的4-5毫米颖片3-5，向上扩大；外稃卵状披针形；内稃长于外稃，很少等长，纤毛，有白霜和在龙骨之间的稍有毛，先端锐尖。

Leaf sheaths scabrid; spikelets purple with bronze at apex.

节间的2-6厘米；浓密的叶背面白色短柔毛。

Culm sheath sparsely setose and white tomentellate; leaf sheaths densely setose and glaucous; culm internodes 10–15 cm.

竿箨稀疏刚毛和白色的短绒毛；叶鞘密被刚毛和有白霜；秆节间的10-15 厘米 17 P。 viridula 笔竹

Leaf sheaths loose, villous; leaf blades linear-lanceolate, 5–20 × 0.3–0.9 cm, villous, margins thickened, smooth, base constricted, apex acuminate; ligule 1–3 mm. Racemes terminal, paired, appressed back to back, 5–8 cm, long exserted; rachis internodes and pedicels stoutly cuneate, triquetrous, villous.

叶鞘松散，具长柔毛；叶片线形披针形 5-20 * 0.3-0.9 厘米，具长柔毛，边缘加厚，平滑，基部使收缩，先端渐尖；叶舌1-3毫米总状花序顶生，配对，背靠背贴伏，5-8厘米，长时间外露；节间的轴和略胖楔形，三棱，具长柔毛的花梗。

Mid-culm internodes 22–53 cm; leaf blade 1–2.2 cm wide

中间秆的节间的22-53厘米；叶片1-2.2厘米宽 10

In order to prevent wheat stem lodging and to fertilize precisely, the experiments on the influence of phosphate and potash fertilizers on mechanical properties of wheat stem were performed with Zhengzhou-wheat 9023 as an object. Mechanical properties (such as flexural strength and flexural rigidity) of second base inter-node were measured by six treatments at five growth stages of wheat, which were jointing stage, booting stage, flowering stage, grain-filling stage and maturity stage. Nonmetallic material testing machine was used in the experiments.

为了对小麦精准施肥，提高小麦的抗倒伏能力，该文以郑麦9023为研究对象，磷钾肥配施共6个处理，分别在小麦拔节期、孕穗期、扬花期、灌浆期、成熟期等5个生长期，利用非金属材料万能试验机，对去鞘茎秆作3点弯曲试验，测试茎秆基部第2节间的弯曲强度和抗弯刚度。

Culm internodes without spots; culm sheath oral setae to 2 cm; pseudopetioles villosulous, leaf blade secondary veins (3 or)4- or 5(or 6)-paired, tessellations rectangular.

没有点节间的Culm；竿箨口头的刚毛到2厘米；假梗微柔毛，叶片次脉3或4或5(或6配对，棋盘花纹矩形。 46 Y。 straminea 黄壳竹

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。