| 摘要: |
| 温度场、磁场对脲酶活性影响的试验结果表明，温度场对脲酶活性影响较大，土壤脲酶活性最高时温度为60℃，而纯脲酶溶液则为50℃左右。磁场对土壤脲酶活性影响较复杂，135mT场强下,磁化3min产生较大正效应,比CK提高8. 3%,磁化5min和30min有负效应,且30min负效应最大; 205mT磁化20min酶活性比CK提高7. 3%.不同磁场强度处理土壤, 100和135mT处理30min可显著降低土壤脲酶活性。磁场、温度场共同作用脲酶溶液,当温度为45℃时具有抑制脲酶活性的作用。 |
| 关键词: 温度场，磁场，脲酶活性 |
| DOI： |
| 分类号:S154.2 |
| 基金项目:国家教委博士点基金资助项目(900703) |
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| The Effect of Temperature and Magnetic Field on Urease Activity |
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| Abstract: |
| 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 soilurease 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. 100mT and 135mT treatment of 30 minutes greatly decreased the activity of soilurease.When the uerase solution was treated simultaneously with temperature
and magnetic field, they could inhibit the activity of urease at 45℃. |
| Key words: temperature,magnetic field,urease activity |
