<正>对5仲不同楸埘（楸树、滇楸、梓树、灰愀和黄金村）花粉萌发率的研究表明：花粉在恒温25℃培养6h时萌发率较好，培蒜基为：10%蔗糖+0.01%硼酸+l%琼脂。在室温水培条件下，花粉在3d内部保持较好的萌发率，第4天至苇7天萌发率快速下降。花粉在液氯和-70%条件下贮藏生活力较好，随贮藏时间延长生活力下降幅度也较小；常温贮藏时花粉萌发率最低，且生4-力丧失快：而0℃和-20℃贮藏花粉生活力居中。超低温保存后花粉的解冻方式对花粉的葫发率影响较大。楸树各树种均以温水浴（35～38℃）下解冻5lnin效果最好。

A triaxial forces sensor was designed to dynamically measure a cutting force, a feeding force and a lateral force of a working saw-chain in real-time. The effects of chip mounting on sensitivity and nonlinearity in the tested forceorientation was analysed. The across sensitivity was discussed in the across tested force-orientation. The across sensitivity was from 3.2 x 10-6N-1 down to 4.27 x 10-7N-1 and the nonlinearity of feeding force was from 7.8%down to 0. 025%, after the chip mounting of the feeding force was adjusted. The test system’ s sensitivity of cutting force, feeding force, lateral force was 5.51 x 10-6N-1, 6.45 x 10-6N-1 and 4.05 x 10-6N-1, respectively.