<正>对柞木（案古坏）椒材和红栎板材进行了压力为0.25、0.40和0.55MPa的蒸汽爆破预处理，并测量了板材在爆破以后的横向气涔渗透性。与束爆破板材的横向气体渗透性相比。经过蒸汽爆破预处理后板材的渗透性得到不同程度的提高。而且蒸汽爆破处理的压力越大及处理温度越高。处理后板材的渗透性越大；板材的厚度越薄。蒸汽爆破处理后其渗透性越大。爆破次数对板材的渗透性也有一定的影响。爆破次数越多。其渗透性越大。

Effects of silicon on changes of glutathione peroxidase (GSH--Px) and superoxide dismatase (SOD) and peroxidase (POD) activity of Zizyphus jujuba cv. Jinsi-xiaozao of one-year-grafted seedings under salt stress were studied. The experimental results showed that superoxide dismatase (SOD)and GSH-Px activity increased with increased of salinity under salinity conditions, POD activity increased under 0.25G NaC1 and decreased under 0.4% NaC1. When siliconwas added to soil salt, S()D, POD and GSH--Px activity increased significantly. It was implied that the damage by salt stress on Z. jujuha cv. Jinsi-xiaozao could be alleviated by silicon.