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The Effect of Temperature and Magnetic Field on Urease Activity

Wei Gehong Sun Benhua He Wenxiang Zhu Minge (Department of Resources and Environmental Science,Northwestern Agricultural University,Yangling,Shaanxi 712100)  
The experiment results of the effects of temperature and magnetic field on urease activity showed as follows:The temperature field had a quite bigger effect on the urease activity.The highest activity of soil urease occured at 60℃,and for urease solution,it was at 50℃.The effect of magnetic field on soil urease was complicated.The magnetic treatment of 135mT for 3 minutes producted significantly positive efficiency with the activity improved by 8.3% than CK. 5 and 30 minutes treatment producted negative efficiency.The magnetic treatment of 205 mT for 20 minutes increased by 7.3% than CK.100 mT and 135 mT treatment of 30 minutes greatly decreased the activity of soil urease.When the uerase solution was treated simultaneously with temperature and magnetic field,they could inhibit the activity of urease at 45℃.
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