The test result shows that the focused width of sample flow changes with the different velocity ratios of sheath flow and sample flow.

实验测试发现随着鞘流与样本流流速比不同，得到样本流的聚焦宽度也不同。

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Difference of them prove flow intensity of spike neck not only relate to roots vigor, may have close ties with the leaf, stem sheath and activity of capacity of reservoir.

它们之间的差异说明穗颈节间的伤流强度不但与根系活力有关，可能与叶片、茎鞘及库容活性也有密切联系。

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In the whole grain filling periods, leaf sheath performed function as flow organs which participated in assimilation products transportation from leaves to grains.

在整个灌浆期，叶鞘又作为物质向籽粒运输的通道(流)——转运同化物质。

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