<正>以低温吸胀的青钱柳种子为材料，采用酸蚀、GA3浸种或GAs拌沙层积等措施进行处理后，对种子的萌发情况和层积过程中贮藏物质的变化进行研究。结果表明：种子成熟脱落后经历的冬季雨雪作用已部分或完全解除了它的初生休眠，人为地中断冷层积及其他因素综合作用可能导致种子进入次生休眠。酸蚀后在（23土2）℃条件下层积的种子发芽率仅为10.3%，而酸蚀后又经GAs浸种和GA。拌沙低温层积的发芽率可提高到44.7%。结果还显示，层积过程中种子三大贮藏物质呈缓慢下降趋势，但各自的分解酶活性并不完全随着贮藏物质含量的降低而增强，尤其是脂肪酶呈现不断下降的趋势。

The models for in-plane shearing modulus of fast growing poplar veneer were built based on the formal researches, in which not only the density of wood, and splits of veneer back were included, but also glue contents and compression ratios of the veneer were analyzed. The results showed that the average relative errors were 20% (Vg＞Vp)between prediction and trial values. Considering the compression ratios of the veneer and glue contents, the ranges of in-plane Poison’s ratio were analyzed.