高浓度二氧化碳处理对红松幼苗土壤水解酶活性的影响

研究了700和500 μmol·mol^-1高浓度CO₂处理的红松幼苗0～10 cm土层土壤蛋白酶、脲酶、淀粉酶、转化酶和磷酸酶活性的变化.结果表明，土壤蛋白酶(除7月)、脲酶、淀粉酶(除7月)和磷酸酶(除9月)活性在高浓度CO₂条件下极显著增加，而转化酶(除9月)活性却极显著降低.不同高浓度CO₂对酶活性的影响程度不同，500 μmol·mol^-1浓度CO₂处理对蛋白酶和磷酸酶活性的影响较700 μmol·mol^-1处理明显，而700 μmol·mol^-1浓度CO₂处理对脲酶、淀粉酶和转化酶活性的影响较500 μmol·mol^-1显著.

Effects of elevated CO2 on soil hydrolase activities associated with Pinus koraiensis seedlings

In this study, Pinus koraiensis seedlings were grown under elevated CO2 (500 and 700 micromol x mol(-1)), and the hydrolase activities in 0 - 10 cm soil layer were determined. The results showed that compared with those under ambient condition, the activities of soil protease, urease, amylase and phosphatase under elevated CO2 increased significantly, while invertase activity decreased significantly. Different concentration of elevated CO2 had different effects on soil hydrolase activities. 500 micromol CO2 x mol(-1) had more significant effect on soil protease and phosphatase activities, while 700 micromol CO2 x mol(-1) had more significant effect on soil urease, amylase, and invertase activities.