<正>研究了不同遮荫条件对假俭草抗氧化酶系统及光合作用的影响，结果表明：遮荫处理后，假俭草叶片的过氧化物酶（POD）、超氧化物歧化酶（SOD）、抗坏血酸过氧化物酶（APX）等保护酶活性、苯丙氨酸解氨酶（PAL）活性以及丙二醛（MDA）含量随遮荫程度的加大逐渐下降，在活性氧产生速率较低的情况下，保护酶活性处于较低状态；可溶性蛋白质及可溶性糖含量随遮荫程度的增加逐渐下降；光合速率（Pn）、蒸腾速率（Tr）、气孔导度（Gs）、水分利用效率（WUE）均随遮荫程度的增加呈下降趋势；胞间隙CO2浓度（Ci）随遮荫程度的增加逐渐上升。遮荫条件下假俭草光合速率降低是非气孔因素所致。对照条件下，假俭草具有很高的光饱和点，意味着该草种具有极高的光能利用能力。随遮荫程度的增加，假俭草光补偿点与光饱和点呈下降趋势，但遮荫处理的表观量子效率（AQY）有不同程度的提高，说明该草对弱光具适应性。因此，假俭草具有良好的应用开发前景。

Through characteristics analysis of the heavy metals (Pb, Cd, Cu, Hg, Cr, Zn, Ni) and metalloid (As,Se) in the soil of four environment cells along the highway. The results showed that there were different heavy mental pollution. The pollution sequence was Qipanjing>Xuejiawan>Shulinzhao>Dongshen. Contrasted with soil of Dongshen there was signif-, icant heavy metal pollution of Cr in soil of Shulinzhao, Hg in soil of Qipanjing and Cr and As in soil of Xuejiawan. Scattering of coals during transportation of trucks and industry waste were the main causes of serious pollution in research sites although motor vehicles by themselves could cause heavy mental pollution in soil along highway. So it should strengthen the management of trucks with coals and control of industry pollution sources in order to provide safeguards for virescence of highway and control of heavy mental pollution in soil along highway.