摘要： <正>通过盆栽控盐（NaCl）、控水的方法。研究了2个刺槐无性系（W1和L78）生长及体内盐离子吸收和分配对干旱、早盐胁迫的响应。探讨了无性系对两种胁迫响应机理的异同及抗旱与耐盐问的关系。结果表明：（1）两种胁迫均明显抑制了2个无性系的生长，其中旱盐胁迫对生长的抑制较干旱胁迫强；就2个无性系而言。干旱胁迫抑制W1生长的作用强。而旱盐胁迫抑制I。生长的作用强。（2）两种胁迫下。Im根中各离子的相对选择性比率（RSK，Na、RSCa，Na、RSMg，Na）小（与W1相比），而叶的RSK，Na、RSCa，Na、RSMg，Na大。造成根中K+、Ca2+、Mg2+的匮乏。是两种胁迫抑制L78生长的共同原因。L78根控制Na+吸收和向地上部运输的能力差。是旱盐胁迫进一步抑制I。主长（与干旱胁迫相比）的原因之一。（3）旱盐胁迫下。wt能维持相对稳定的矿质营养水平，尤其是K+、Ca2+同时根对Na+的吸收和向地上部的运输有较强的控制能力。表现出较强的抗旱耐盐能力。（4）干旱胁迫下，W1根中离子总量降低幅度大干L78，表明无机离子在渗透调节中所占比重较L78小。说明有机渗调作用加强。加大了植物自身物质和能量的消耗，造成于旱抑制W1生长的作用较L78大。

Abstract: Phyllostachys edulis, Dendrocalamus latiJlorus, Dendrocalamopsis oldhami, Bambusa arundinacea were selected. The dynamic damage process parallel and perpendicular (radial direction)to the axial direction was tested. After the testing, the bulk microstructure and compressive mechanical properties of bamboo were studied. The results show that the strain-stress curve, dynamic damage process and damage cross surface are highly related, and the bamboo species, age and the compressive direction are related to the compressive strength. The bamboo compressive dynamic damage process is critical to understand the bamboo mechanical properties.

中图分类号: 

• S781